Litšebeliso tsa HTPB Lefapheng la Lifofane

HTPB (Hydroxyl-Terminated Polybutadiene) ke rabara le binder tsa maiketsetso tse sebetsang hantle haholo tse sebelisoang haholo sefofaneng ka lebaka la thepa ea eona e ntle ea mechini, khanyetso ea mocheso o tlase, botsitso ba lik'hemik'hale le bokhoni ba ho khomarela. Ka tlase ke lits'ebetso tsa bohlokoa le litšobotsi tsa HTTPB ka sefofaneng.

**1. Binder bakeng sa Li-propellant tsa Rokete tse Tiileng**

HTTPB ke matrix ea binder e sebelisoang haholo ho li-propellant tsa li-rocket motor tse tiileng, e sebeletsang mesebetsi e latelang:

- Ho tlama likarolo tse tiileng: E kopanya di-oxidizer ka ho lekana (mohlala, Ammonium perchlorate, AP), mafura a tšepe (mohlala, Phofo ea Aluminium),HTTPB/AP/Al foromo, le lintho tse ling tse eketsang ho etsa propellant e tsitsitseng e kopaneng.

- Ho fana ka thepa ea mechini: HTTPBLi-propellant tse thehiloeng holim'a tsona li bontša ho tenyetseha ho hoholo, ho hanyetsa mapetso, le ts'ebetso e ntle haholo mochesong o tlase (e loketse maemo a feteletseng a sebaka).

- Ho fetola tshebetso ya ho tuka ha molloSekhahla sa ho tuka ha mollo le tlhahiso ea matla li ka laoloa ka moralo oa sebopeho (mohlala, ho eketsa li-plasticizer kapa liakhente tse hokahanyang).

- Likopo tsa baemeli: Li-booster tsa Space Shuttle (SRB), Lirokete, Sefutho sa mafura bakeng sa koloi e qalang sathelaete

**2. Thepa ea ho kenya lintho tse sireletsang mocheso le ea ho kenya liner**

HTTPB e sebelisoa lienjeneng tsa rokete e le li-insulation layers kapa li-liner ho sireletsa likheo tsa tšepe/composite khahlanong le khoholeho ea khase ea mosi e chesang haholo:

- Khanyetso ea mocheso o phahameng:Ka li-additives tse hanelang mocheso (mohlala, silica, likhoele tsa khabone), HTTPBHo thibela mocheso ho thehiloeng hodima khase ho ka mamella mocheso o fetang 3000°C.

- Ho khomarela: E theha maqhama a matla le thepa ea casing (mohlala, tšepe, metsoako), e thibelang karohano.

**3. Resin ea Matrix bakeng sa Lihlopha tse Kopantsoeng**

HTTPB e sebetsa e le matrix ea polymer ka har'a metsoako ea lifofane:

- Meaho e bobebe: Ha e kopantsoe le likhoele tsa khabone kapa khalase, e sebelisoa ho li-fairing tsa rokete, likarolo tsa sathelaete, jj.

- Khanyetso ea tšusumetso: E loketse ho mamella ho thothomela ha ho qala le meroalo ea mechini.

**4. Litiiso le Liaparo**

- Lisebelisoa tsa ho tiisa: HTTPBLi-sealant tse thehiloeng holim'a li-rocket fuel li sebelisoa litankeng tsa mafura le manonyeletsong ho thibela ho lutla ha metsi.

- Liaparo tse sireletsang: Khanyetso ea eona ea lik'hemik'hale le mahlaseli e etsa hore e lokele tšireletso ea kantle ea sathelaete.

**5. Melemo ea HTTPB**

- Tlhahiso e phahameng ea matla: Bond e phahameng ea CH e fana ka mocheso o moholo oa ho tuka.

- Ho ikamahanya le maemo mochesong o moholo: E boloka tshebetso e tsitsitseng ho tloha ho -40°C ho isa ho 60°C.

- Ts'ebetso ea batho ba baholo: Ho bonolo ho e lahla le ho e bopa, e loketse tlhahiso e kgolo.

**6. Qetello**

Ka lebaka la thepa ea eona e leka-lekaneng, HTTPB ke thepa ea bohlokoa bakeng sa li-propellant tse tiileng tsa rokete le lits'ebetso tsa lifofane, e tšehetsang likoloi tsa sejoale-joale tsa ho qala, limisaele le mahlale a sathelaete. Tsoelo-pele ea nakong e tlang liroketeng tse ka sebelisoang hape le lipatlisiso tsa sebaka se tebileng e tla tsamaisa ntlafatso e eketsehileng ea HTTPB metsoako (mohlala, matla a mangata kapa botsoalle ba tikoloho).

Khamphani ea rona e fana ka HTTPB ka mekhahlelo e fapaneng mme e fana ka tlhahiso e ikhethileng ho latela litlhaloso tse hlokahalang tsa bareki. Ho sa le joalo, re na le tumello ea ho fana ka laesense ea ho romela thepa kantle ho naha bakeng sa HTTPB.