pagh be melting lang, tuj QIt softening, pa' 130 ¡æ ~ 140 ¡æ wabmeyvetlh softened, chaq NR ~ 150 ℃ ℃ viscosity SoHvaD jeD fluids, ghor tagh 200 ¡æ, ghor tagh 270 [taH. ghanjaq let boghaj'a' pa' Hat, NR elastic, Hat nup, laghlu'DI' je 0 ° [taH flexible ghaHmo' reduce-70 ℃ below moj brittle. tuj taD natural rubber elasticity laH SabHa' pa' Hat
1 elastic
elastic modulus 3 ghot tu'lu'. mej NR ~ 6mpa, elongated 1000 vatlhvI' HurDaq breaking.
2 hardness
NR crystal external tension crystalline, HoS bopummeH SoHDaq-complementary; NR tIn molecular ngI', jen HoS mechanical. nIt gum vulcanizate fracture HoS 16.7 ~ 28.4mpa, qIj carbon, porghDaj moH 24.5 reinforced ~ 34.3mpa qaSpu'DI'. NR multiple deformation 'ej 'eS tuj pobIQ. ghaH tlhejmeH QaQ resistance Flex fatigue.
3 qantaHvIS
chonaDmo', cha'logh vaj bonds, ngeD yInSIp, absorb NR laH decompose ultraviolet chep, 'ej pe'vIl vaj pumDI' qoghlIj.
4 media
polar ghom, QI'yaH-polar rubber, neH 'op polar solvents wej ngaS NR. Qo'noS insoluble ethyl acetate, ethanol 'ej acetone. pa' such as gasoline QI'yaH-polar solvents, swelling benzene. maj, 'ach wej resistant qIm HoS pey solvent resistance oil resistance vIvup, alkaline resistance.
5 mIw
NR ngI' molecular broad distribution, QaQ processing bang je. QaQ dispersibility 'ej NR 'ej compounding solubility. HablI', yuQmeyDaq plasticity 'ej viscosity, Dov'agh vIrur calender roller ghaj.
Dunmo' breathability, bIQ resistance, bIr resistance electrical insulation je 6nr. pov flexibility 'ej tolerance.
