Kev nce qib hauv cov txheej txheem kho ntawm Epoxidized Hydroxyl Terminated Polybutadiene
Cov Ntsiab Lus Tseem Ceeb
- Cov kev nce qib kho tshiab tsis ntev los no ua rau Epoxidized HTPB yooj yim dua rau kev ua tiav, txhim kho nws lub zog kho tshuab thiab thermal stability.
- Kev ua kom zoo dua cov kev kho kom zoo xws li qhov kub thiab qhov concentration ntawm cov tshuaj catalyst ua rau cov khoom siv ua haujlwm tau zoo dua hauv cov ntawv thov uas nyuaj heev.
- Cov neeg sawv cev kho tshiab thiab cov catalysts ua rau lub sijhawm kho sai dua thiab cov kev sib txuas muaj zog dua, ua rau Epoxidized HTPB tsim nyog rau aerospace thiab electronics.
EHTPB (Epoxidized HTPB) CAS No.129288-65-9 Epoxidized Hydroxyl Terminated Polybutadien: Cov Txheej Txheem Kho thiab Lawv Qhov Tseem Ceeb
Cov yam ntxwv tshwj xeeb ntawm Epoxidized HTPB (EHTPB)
Epoxidized HTPB CAS No.129288-65-9 Epoxidized Hydroxyl Terminated Polybutadien sawv tawm vim nws cov qauv tshuaj tshwj xeeb. Cov khoom siv muaj cov pab pawg epoxy thiab cov hydroxyl xaus. Cov yam ntxwv no tso cai rau nws los cuam tshuam nrog cov neeg sawv cev kho sib txawv. Cov pab pawg epoxy ua rau cov polymer ntau polar, uas txhim kho nws lub peev xwm los sib txuas nrog lwm cov ntaub ntawv. Cov pab pawg hydroxyl pab cov txheej txheem kho thiab ua kom yooj ywm. Cov kws tshawb fawb siv cov khoom siv no hauv cov teb siab heev vim nws tuaj yeem tswj hwm cov chaw nyuaj.
Cov txheej txheem kho mob tseem ceeb suav nrog:
- Kev ntxiv cov amine thawj zaug
- Kev ntxiv amine theem nrab
- Etherification
Cov tshuaj tiv thaiv no hloov cov qauv ntawm Epoxidized HTPB CAS No.129288-65-9 Epoxidized Hydroxyl Terminated Polybutadien. Cov pab pawg epoxy react nrog isocyanates, tsim oxazolidinones. Cov txheej txheem no ua rau muaj zog thiab thermal stability.
Lub Luag Haujlwm ntawm Kev Kho Mob hauv Kev Txhim Kho Kev Ua Haujlwm
Kev kho kom zoo yog ib qho tseem ceeb uas ua rau cov khoom siv muaj zog thiab ruaj khov dua. Thaum cov txheej txheem kho kom zoo tshwm sim, cov saw hlau polymer txuas ua ke. Qhov no ua rau cov khoom siv tawv dua thiab tsis tshua tawg. Cov tshuaj kho kom zoo kuj txo qhov tsis sib xws, uas pab cov khoom siv tiv taus cua sov thiab tshuaj lom neeg.
Lub rooj hauv qab no qhia txog yuav ua li cas kev kho kom zoo dua qub:
| Kev Ua Tau Zoo | Kev piav qhia |
|---|---|
| Cov Khoom Siv Kho Tshuab | Cov khoom kho EHTPB/H12MDI qhia tau tias muaj cov khoom siv kho tshuab zoo dua li cov khoom HTPB/H12MDI. |
| Kev nplaum | Epoxidation ua rau polarity nce ntxiv, uas ua rau kev sib txuas rau cov substrates polar thiab ua rau lub zog shear nce mus txog peb zaug. |
| Kev Tiv Thaiv Tshuaj | Kev hloov pauv ntawm cov qauv los ntawm epoxidation ua rau muaj kev tiv thaiv tshuaj lom neeg thiab noo noo. |
| Kev Ruaj Ntseg Thermal | Qhov tsis txaus ntawm cov khoom siv ua rau muaj kev ruaj khov zoo dua, ua rau cov khoom siv no haum rau kev siv siab heev. |
Lub Tswv Yim: Kev kho tsis yog tsuas yog ua kom cov khoom siv muaj zog xwb tab sis kuj ua rau nws ntseeg tau dua rau cov ntawv thov uas xav tau ntau yam xws li aerospace thiab tub rog.
Cov Txheej Txheem Kho Kom Zoo ntawm EHTPB (Epoxidized HTPB)
Cov Tshuaj Tiv Thaiv Hauv Cov Txheej Txheem Kho
Epoxidized HTPB CAS No.129288-65-9 Epoxidized Hydroxyl Terminated Polybutadien dhau los ntawm ntau yam tshuaj lom neeg tseem ceeb thaum lub sijhawm kho. Cov kws tshawb fawb pom tias cov pab pawg epoxy cuam tshuam nrog isocyanates, uas ua rau muaj oxazolidinones. Cov qauv network no ua rau cov khoom siv muaj zog thiab txhim kho nws cov khoom. Cov kws tshawb fawb siv cov ntsuas calorimetry sib txawv (DSC) thiab lwm txoj hauv kev los taug qab cov kev hloov pauv no. Qhov kub hloov iav nce siab, qhia tias cov khoom siv ruaj khov dua.
| Hom pov thawj | Kev piav qhia |
|---|---|
| Kev Kho Mob Kinetics | Qhov kev kho mob ua rau muaj cov qauv network, qhia txog kev tsim cov oxazolidinones. |
| Cov Khoom Siv Kho Tshuab | Qhov muaj oxazolidinone ua rau polyurethane elastomers zoo dua, ua rau qhov kub hloov iav nce siab. |
| Cov Kev Ntsuas | DSC thiab lwm yam kev ntsuam xyuas lees paub qhov kev hloov pauv ntawm cov khoom siv kho tshuab thiab thermal. |
Lus Cim: Kev tsim cov oxazolidinones yog ib kauj ruam tseem ceeb uas ua rau muaj zog thiab ruaj khov.
Cov Yam Uas Cuam Tshuam Rau Kev Ua Haujlwm Zoo ntawm Kev Kho Mob
Muaj ntau yam uas cuam tshuam rau qhov ua haujlwm ntawm cov txheej txheem kho kom zoo. Qhov kub thiab txias ua lub luag haujlwm tseem ceeb. Qhov kub siab dua ua rau cov tshuaj tiv thaiv sai dua thiab txo lub sijhawm kho kom zoo. Qhov kub thiab txias kuj tseem ceeb. Kev ua kom sov sai dua ua rau lub sijhawm tiv thaiv luv dua thiab ua rau qhov kub hloov pauv ntau dua, uas hloov pauv txoj kev uas cov saw hlau polymer teeb tsa lawv tus kheej. Cov tshuaj catalysts pab cov txheej txheem los ntawm kev ua kom cov tshuaj tiv thaiv tshwm sim sai dua thiab tiav dua.
| Qhov tseem ceeb | Kev cuam tshuam rau kev kho kom zoo |
|---|---|
| Kub | Qhov kub siab dua ua rau lub sijhawm kho kom zoo dua los ntawm kev ua kom cov tshuaj tiv thaiv sai dua. |
| Cov Nqi Cua Sov | Cov nqi cua sov ntxiv ua rau lub sijhawm teb sai dua thiab ua rau qhov kub hloov pauv nce siab. |
| Cov tshuaj catalysts | Cov catalysts tseem ceeb heev rau kev txhim kho cov txheej txheem kho, raws li cov ntaub ntawv sim tau pom. |
Lub Tswv Yim: Kev kho qhov kub thiab txias, qhov ceev ntawm kev ua kom sov, thiab hom catalyst tuaj yeem pab cov kws tshawb fawb ua tiav cov txiaj ntsig zoo tshaj plaws.
Cov Kev Txhim Kho Tshiab hauv Kev Kho Mob rau Epoxidized HTPB
Cov Neeg Sawv Cev Kho thiab Cov Catalysts Tshiab
Cov kws tshawb nrhiav tau tsim cov neeg sawv cev kho tshiab thiab cov tshuaj catalysts uas txhim kho kev ua tau zoo ntawm Epoxidized HTPB CAS No.129288-65-9 Epoxidized Hydroxyl Terminated Polybutadien. Cov kev tsim kho tshiab no pab cov khoom kho sai dua thiab muaj zog dua.
- Maleic anhydride ua haujlwm ua tus neeg sawv cev hla kev sib txuas rau cov roj hmab ntuj epoxidized. Nws tsim cov kev sib txuas zoo yam tsis tas yuav siv cov tshuaj catalysts ntxiv. Txoj kev no ua rau cov txheej txheem kho kom yooj yim dua.
- Terephthalic acid ua haujlwm ua tus crosslinker thiab txhim kho kev puas tsuaj hauv av ntuj. Nws ua haujlwm zoo dua li roj hmab sulfur-vulcanized, ua rau cov khoom siv zoo dua rau ib puag ncig.
- Dodecanedioic acid, ua ke nrog 1,2-dimethylimidazole, ua kom cov txheej txheem kho sai dua. Cov tshuaj catalyst tsim cov carbon-oxygen bonds muaj zog dua, uas ua rau cov khoom siv kho tshuab zoo dua.
- Tus catalyst T-12 txo qhov zog ua haujlwm ntawm cov tshuaj kho. Nws ua kom cov tshuaj kho sai dua ntawm isocyanate thiab hydroxy pawg. Qhov no ua rau cov tshuaj kho sai dua thiab muaj qhov sib txuas ntau dua.
Cov kws tshawb fawb xaiv cov neeg sawv cev thiab cov catalysts no kom ua tiav lub zog kho tshuab zoo dua, kho sai dua, thiab txhim kho kev ua haujlwm ib puag ncig.
Kev Txhim Kho Cov Txheej Txheem
Kev ua kom cov txheej txheem zoo tshaj plaws pab cov kws tshawb fawb tswj qhov ceev ntawm kev kho thiab qhov zoo ntawm Epoxidized HTPB CAS No.129288-65-9 Epoxidized Hydroxyl Terminated Polybutadien. Lawv kho qhov kub, qhov ceev ntawm kev ua kom sov, thiab qhov concentration ntawm catalyst kom tau txais cov txiaj ntsig zoo tshaj plaws.
- Qhov kub siab dua ua rau lub sijhawm kho sai dua. Cov tshuaj tiv thaiv tshwm sim sai dua, thiab cov khoom siv yuav muaj zog dua.
- Cov cua sov sai dua ua rau lub sijhawm ua haujlwm luv dua. Lawv kuj ua rau qhov kub hloov pauv iav nce siab, uas ua rau kev ruaj khov ntawm thermal zoo dua.
- Qhov ntau ntawm cov catalyst cuam tshuam rau qhov nrawm ntawm cov tshuaj tiv thaiv. Cov catalyst ntau dua txhais tau tias nws yuav kho tau sai dua, tab sis ntau dhau tuaj yeem txo qhov ceev ntawm cov crosslink. Cov kws tshawb fawb sib npaug cov theem catalyst kom tau qhov hnyav molecular thiab lub zog tsim nyog.
Kev tswj xyuas cov kev ntsuas no kom zoo zoo ua kom cov khoom siv kho tau zoo thiab ua tau raws li cov qauv kev ua tau zoo.
Cov Txuj Ci Tshawb Fawb thiab Kev Saib Xyuas Qib Siab
Cov kws tshawb fawb siv cov txheej txheem siab heev los kawm txog cov txheej txheem kho. Cov txheej txheem no pab lawv nkag siab txog cov khoom hloov pauv li cas thaum lub sijhawm kho thiab yuav ua li cas txhim kho nws.
| Kev siv tshuab | Daim Ntawv Thov | Cov kev txwv |
|---|---|---|
| 1H NMR Relaxometry | Siv rau kev piav qhia txog kev polymerization thiab kev kho cov tshuaj tiv thaiv hauv qhov chaw. | Cov kev tseeb tshwj xeeb tsis tau piav qhia meej; vam khom rau T1 kev tshawb nrhiav uas yuav txawv nrog cov xwm txheej. |
| Kev NMR Diffusion | Ntsuas cov coefficients ntawm kev sib kis tus kheej hauv cov polymers thiab cov ntaub ntawv mos. | Yuav tsum tau muaj kev cuam tshuam ntawm echo kom ntau dua li T2; tej zaum yuav tsis suav nrog kev txav me me. |
Cov kws tshawb fawb siv 1H NMR relaxometry los saib xyuas cov txheej txheem kho thaum nws tshwm sim. Cov txheej txheem no pab lawv pom tias cov saw hlau polymer txuas ua ke li cas. Diffusion NMR ntsuas seb cov molecules txav mus rau hauv cov khoom li cas. Nws muab cov ntaub ntawv hais txog cov qauv thiab qhov zoo ntawm cov khoom kho.
Cov cuab yeej no pab cov kws tshawb fawb saib xyuas kev kho kom zoo hauv lub sijhawm tiag tiag thiab hloov kho kom zoo dua cov khoom siv.
Kev Cuam Tshuam ntawm Kev Txhim Kho Kev Kho Mob rau Cov Khoom Siv
Kev Txhim Kho Hauv Lub Zog Thiab Kev Hloov Tau Yooj Yim ntawm Lub Tshuab
Cov kws tshawb fawb tau pom tias cov txheej txheem kho tshiab ua rau Epoxidized HTPB cov ntaub ntawv muaj zog dua thiab yoog tau dua. Cov saw polymer tsim cov tes hauj lwm nruj dua, uas pab cov ntaub ntawv tiv taus kev tawg thiab ncab. Cov tes hauj lwm no tso cai rau cov ntaub ntawv khoov yam tsis tawg. Cov kws tshawb fawb ntsuas lub zog tensile thiab elongation thaum tawg kom pom tias cov ntaub ntawv ua haujlwm li cas. Cov txiaj ntsig qhia tau tias cov polymer kho tau tuaj yeem tuav cov khoom hnyav thiab kev txav mus los ntau zaus. Qhov kev txhim kho no pab cov ntaub ntawv siv tau ntev dua hauv cov chaw nyuaj.
Ntau lub lag luam siv cov khoom siv no uas muaj zog dua thiab yoog tau dua. Piv txwv li, cov kws ua haujlwm aerospace xav tau cov polymers uas tuaj yeem tiv taus kev ntxhov siab siab. Cov khoom siv kho tshuab zoo dua ua rau Epoxidized HTPB CAS No.129288-65-9 Epoxidized Hydroxyl Terminated Polybutadien yog ib qho kev xaiv zoo rau cov ntawv thov no.
Kev Ruaj Ntseg Thermal thiab Tshuaj Lom Zem Zoo Dua
Kev nce qib ntawm kev kho kom zoo kuj ua rau cov khoom siv muaj peev xwm tiv taus cua sov thiab tshuaj lom neeg. Cov kws tshawb fawb sim cov khoom siv los ntawm kev muab tso rau hauv qhov kub siab thiab cov tshuaj lom neeg hnyav. Cov txiaj ntsig qhia tau tias cov polymer kho kom zoo tseem ruaj khov thiab tsis yooj yim tawg.
Cov kev ntsuam xyuas kev tiv thaiv tshuaj lom neeg qhia tau hais tias EHTPB-PUs tau pom tias muaj kev poob phaus ntau dua li HTPB-PU nyob rau hauv cov xwm txheej acidic thiab basic. Txawm li cas los xij, qhov kev puas tsuaj ntawm 10% EHTPB-PU qauv qis dua li ntawm 5% EHTPB-PU qauv, qhia tias thaum thawj zaug epoxide incorporation yuav ua rau muaj kev cuam tshuam rau kev tawm tsam tshuaj lom neeg, kev koom ua ke ntxiv ua rau muaj kev sib txuas ntawm crosslinking, yog li txhim kho kev ruaj khov tshuaj lom neeg.
Qhov ruaj khov ntawm cov khoom siv nyob ntawm seb siv epoxidized HTPB ntau npaum li cas. Cov kws tshawb fawb pom tias qhov kub thiab txias pib ntawm cov tshuaj epoxidized HTPB yog 307 ° C. Qhov kub ntawm qhov poob phaus siab tshaj plaws tshwm sim ntawm peb theem: txog 240 ° C, 360–370 ° C, thiab 440 ° C. Cov txiaj ntsig no qhia tau tias cov ntsiab lus EHTPB siab dua tuaj yeem txo qhov ruaj khov ntawm thermal, tab sis kev qhia txog kev ua haujlwm polar los ntawm epoxidation txhim kho kev sib raug zoo nrog cov khoom ntxiv polar.
- Qhov kub pib ntawm cov tshuaj epoxidized HTPB tau pom tias yog 307 ° C.
- Qhov ntxiv ntawm EHTPB-based polyurethane prepolymer ua rau muaj kev txo qis ntawm thermal stability nrog rau cov ntsiab lus EHTPB ntau ntxiv.
- Qhov kub ntawm qhov poob phaus siab tshaj plaws (Tmax) tau pom ntawm peb theem: kwv yees li 240 ° C, 360–370 ° C, thiab 440 ° C, qhia txog kev txo qis ntawm kev ruaj khov thermal nrog cov ntsiab lus EHTPB siab dua.
- Tus T5% ntawm cov epoxy resin hloov kho qis dua li ntawm cov epoxy resin huv si, qhia txog kev ruaj khov thermal txo qis.
- Kev tiv thaiv tshuaj lom neeg tau txhim kho vim yog kev qhia txog kev ua haujlwm ntawm polar los ntawm epoxidation, txhim kho kev sib raug zoo nrog cov khoom ntxiv polar.
Cov kev tshawb pom no pab cov kws tshawb fawb xaiv cov txheej txheem kho kom zoo rau txhua daim ntawv thov. Lawv sib npaug ntawm cov epoxidized HTPB kom tau txais qhov sib xyaw zoo tshaj plaws ntawm kev ruaj khov thermal thiab tshuaj lom neeg.
Cov Ntaub Ntawv Sib Piv thiab Cov Kev Kawm Txog Cov Neeg Mob
Cov kws tshawb nrhiav piv cov khoom ntawm cov khoom siv kho Epoxidized HTPB nrog cov qauv qub thiab lwm yam khoom siv. Lawv siv cov lus thiab cov duab los qhia qhov sib txawv. Cov ntaub ntawv qhia tau hais tias cov txheej txheem kho tshiab muab cov khoom siv lub zog zoo dua, kev ywj pheej, thiab kev ruaj khov.
| Vaj tse | Cov Qauv HTPB Laus Dua | Cov HTPB Epoxidized Siab Tshaj Plaws |
|---|---|---|
| Lub zog tensile | Qis dua | Siab dua |
| Kev ntev thaum tawg | Nruab nrab | Zoo dua |
| Lub Sijhawm Decomposition Pib | 290 °C | 307 °C |
| Kev Tiv Thaiv Tshuaj | Txwv | Txhim kho |
Cov kev tshawb fawb qhia txog seb cov kev txhim kho no pab tau li cas hauv cov xwm txheej tiag tiag. Hauv kev tsav dav hlau, cov kws ua haujlwm siv cov khoom siv rau kev foob thiab cov nplaum. Cov khoom siv kav ntev dua thiab ua haujlwm zoo dua thaum muaj kev ntxhov siab. Hauv cov khoom siv hluav taws xob, qhov kev ruaj khov zoo dua tiv thaiv cov khoom rhiab heev los ntawm cua sov thiab tshuaj lom neeg.
Lub Tswv Yim: Cov kws ua vaj tse thiab cov kws tshawb fawb siv tau cov txiaj ntsig sib piv no los xaiv cov khoom siv zoo tshaj plaws rau lawv cov haujlwm.
Cov Kev Siv Tau Zoo ntawm Epoxidized HTPB CAS No.129288-65-9 Epoxidized Hydroxyl Terminated Polybutadien
Daim Ntawv Thov Aerospace thiab Propellant
Cov kws ua haujlwm aerospace siv Epoxidized HTPB CAS No.129288-65-9 Epoxidized Hydroxyl Terminated Polybutadien hauv cov khoom siv foob pob hluav taws khov kho. Cov khoom siv no tsim cov khoom sib txuas uas muaj zog, yoog tau uas tuav cov roj av ua ke. Cov khoom sib txuas no pab cov foob pob hluav taws tiv taus qhov siab thiab kub thaum lub sijhawm tso tawm. Cov txheej txheem kho kom zoo dua muab cov khoom siv lub zog thiab kev ruaj khov zoo dua. Qhov no txhais tau tias cov foob pob hluav taws tuaj yeem ua haujlwm tau zoo dua thiab muaj kev nyab xeeb dua. Ntau lub koom haum chaw thiab cov tuam txhab tiv thaiv xaiv cov khoom siv no rau nws qhov ruaj khov thiab kev ua tau zoo.
Cov Tshuaj Pleev Xim, Cov Nplaum, thiab Cov Tshuaj Ntsaws
Cov chaw tsim khoom siv cov polymer no rau cov txheej txheem siab heev, cov nplaum, thiab cov sealants. Cov khoom siv muaj zog sib txuas thiab tshuaj lom neeg tiv thaiv cov nplaim ntawm kev puas tsuaj. Cov tuam txhab zoo li Evonik tau nthuav dav lawv cov chaw tsim khoom hauv lub teb chaws Yelemees thiab Asia kom tau raws li qhov kev thov nce ntxiv rau cov khoom no. Lawv cov peev txheej qhia txog kev cog lus rau kev muab khoom txhim khu kev qha thiab kev ua tau zoo dua. Lub rooj hauv qab no qhia txog cov qauv kev lag luam tsis ntev los no:
| Hom pov thawj | Kev piav qhia |
|---|---|
| Kev nthuav dav ntawm lub tuam txhab | Evonik tab tom nthuav nws cov chaw tsim khoom HTPB hauv lub teb chaws Yelemees thiab Asia kom tau raws li qhov kev thov thoob ntiaj teb rau cov polymers siab heev. |
| Kev Teb Zoo | Kev nqis peev qhia txog kev cog lus rau kev muab khoom siv txhim khu kev qha thiab kev ua tau zoo dua hauv kev pleev xim, nplaum, thiab sealant. |
| Cov Phiaj Xwm Yav Tom Ntej | Kev tsim kho tab tom ua kom nce ntxiv cov zis HTPB, qhia txog kev hloov kho mus rau qhov xav tau ntawm kev ua lag luam. |
Cov kev ua no qhia tau tias cov khoom siv no tseem ceeb npaum li cas hauv kev tiv thaiv thiab sib txuas cov nto hauv ntau yam lag luam.
Kev Siv Hluav Taws Xob Encapsulation thiab Lwm Yam Kev Siv Tshiab
Cov tuam txhab ua khoom siv hluav taws xob siv cov polymer no los tiv thaiv cov khoom rhiab heev ntawm cov dej noo thiab cua sov. Cov khoom siv kho tau ua ib qho thaiv tawv nyob ib puag ncig cov circuits thiab chips. Qhov no pab cov khoom siv kav ntev dua thiab ua haujlwm zoo dua. Cov kws tshawb fawb kuj tshawb nrhiav kev siv tshiab hauv cov khoom siv kho mob thiab kev khaws cia lub zog. Cov khoom siv qhov yooj ywm thiab lub zog qhib qhov rooj rau ntau daim ntawv thov yav tom ntej.
Cov kev tshawb fawb tsis ntev los no qhia tau hais tias cov tshuaj ua kom cov tshuaj kho zoo li 593 txhim kho kev kho kom zoo thiab cov khoom siv kho tshuab. Cov lus hauv qab no qhia txog cov ntsiab lus tseem ceeb:
| Kev Nrhiav Tus yuam sij | Kev piav qhia |
|---|---|
| Txoj Kev Kho Mob | Qhov kub siab ua rau cov tshuaj carboxyl-epoxy ua tiav tab sis yuav ua rau muaj kev ntxhov siab thermal. |
| Tshuaj Kho Mob Sai | 593 ua rau cov tshuaj tiv thaiv qhib lub nplhaib thiab lub zog kho tshuab zoo dua. |
| Cov Khoom Siv | Cov qauv tsim kho kom zoo dua txhim kho kev ua haujlwm ntawm cov binder. |
Epoxidized HTPB tam sim no muaj kev ruaj khov zoo dua thiab lub zog kho tshuab rau cov roj propellants thiab cov nplaum. Cov kws tshawb fawb txuas ntxiv tshawb nrhiav cov txheej txheem kho tshiab thiab cov teb thov. Lawv kuj daws cov teeb meem xws li kev kho tsis sib npaug thiab cov teebmeem ib puag ncig los ntawm kev tsim cov photoinitiators thiab cov txheej txheem sib xyaw ua ke.
- Lub kaw lus EHTPB-IPDI qhia tau tias muaj kev cuam tshuam ntau dua thaum lub sijhawm kho.
- Kev xaiv epoxidation txhim kho kev nplaum thiab tshuaj lom neeg.
- Cov photoinitiators tshiab thiab cov tshuab sib xyaw ua ke pab daws cov teeb meem kho.
Kev tshawb fawb yav tom ntej yuav tsom mus rau kev ua kom zoo dua cov txheej txheem kho thiab nthuav dav kev siv hauv cov lag luam siab heev.
Cov Lus Nug Feem Ntau
Dab tsi ua rau HTPB uas muaj epoxidized txawv ntawm ib txwm muaj HTPB?
Epoxidized HTPB muaj cov pawg epoxy. Cov pawg no ua rau polarity nce ntxiv thiab txhim kho kev sib txuas. Cov khoom siv qhia tau tias muaj zog dua thiab tiv taus tshuaj lom neeg.
Cov kws tshawb fawb saib xyuas cov txheej txheem kho li cas?
Cov kws tshawb nrhiav siv cov cuab yeej siab heev xws li 1H NMR relaxometry. Cov txheej txheem no taug qab cov kev hloov pauv ntawm cov saw hlau polymer thaum lub sijhawm kho. Nws pab txhim kho cov khoom zoo.
Cov lag luam siv qhov twg HTPB uas muaj epoxidized?
Kev lag luam aerospace, electronics, thiab coatings siv epoxidized HTPB. Cov khoom siv no tiv thaiv cov nto, khi cov propellants, thiab tiv thaiv cov khoom siv hluav taws xob los ntawm cua sov thiab noo noo.