Roj hmab (NR)

Cov khoom siv raw ntawm cov roj hmab ntuj yog los ntawm cov roj hmab cog ntoo. Nws qhov zoo yog: zoo elasticity, siab zog, zoo rwb thaiv tsev, me deformation, yooj yim ua. Nws qhov tsis zoo yog: nws tsis yog roj resistant, tsis zoo kub tsis kam, yooj yim rau hnub nyoog, thiab feem ntau yog siv ua ke. Nws feem ntau yog siv los tsim cov tsheb log tsheb thiab qee qhov kev poob siab-absorbing thiab hnav-resistant roj hmab qhov chaw.

Hauv nws daim ntawv qub, latex yog greasy thiab nplaum. Cov roj hmab ntuj yog ib qho elastic polymer, ua rau ntawm isoprene ua nws cov monomer. Ua kom nws siv tau technically, ntev polyisoprene chains ntawm cov roj hmab ntuj yog sib txuas nrog ib leeg los ntawm vulcanization - uas muaj kev sib ntxiv ntawm sulfur nyob rau hauv siab thiab kub. Nyob rau hauv tus txheej txheem, sulfur atoms ntxig lawv tus kheej ntawm ob daim ntawv cog lus ntawm cov saw hlau uas nyob ib sab - feem ntau ntawm ob daim ntawv cog lus tau khaws cia.

Qhov tshwm sim yog qhov peb-dimensional molecule network uas nws qhov chaw tsuas tuaj yeem hloov tawm tsam ib leeg hauv qee qhov txwv. Cov khoom ntawm cov khoom tuaj yeem tswj tau los ntawm kev hloov cov tooj liab atoms hauv ib tus choj. Cov khoom siv hluav taws xob muaj zog feem ntau muaj cov kav hlau txuas ntev dua, thaum teeb tsa tus cwj pwm thiab kev ruaj ntseg ntawm cov cua sov ua kom zoo dua qub nrog cov hlau txuas luv luv. Cov roj hmab ntuj yog cov roj hmab uas ntev tshaj plaws molecule chains, uas muab nws zoo heev dynamic qualities.

Elastomers ua los ntawm cov roj hmab ntshiab muaj zog stretchability, xws li ntawm 700 mus rau 1000 feem pua. Nyob rau tib lub sijhawm, elastomer yog ze li ntawm tsis-compressible - nws tsis tso cai rau nws tus kheej kom compressed - tsuas yog hloov chaw. Cov roj hmab ntuj yog ruaj khov hauv cov kua qaub, cov hauv paus, dej, cawv thiab cua, uas yog, nyob rau hauv polar media. Nws muaj kev sib raug zoo nrog cov xov xwm tsis tshua muaj xws li roj av-raws li cov roj, cov roj ntsha hluavtaws, cov kua dej nres raws li glycol, overheated ya raws, thiab cov roj uas muaj ntxhiab hydrocarbons (gasoline).

Cov roj hmab ntuj nthuav tawm siab elasticity nrog rau qhov txias txias thiab damping tus cwj pwm nyob rau hauv qhov kub ntawm -60 degree txog 80 degree. Cov roj hmab ntuj qhia me ntsis tsis kam mus rau qhov kub siab ua ke nrog oxygen. Cov reactive ob daim ntawv cog lus tseem tshuav tom qab vulcanization tau yooj yim nrog oxygen thiab ua rau cov roj hmab ntuj.

Cov roj hmab ntuj yog tsuas yog siv nyob rau hauv kev co tswj technology raws li ib tug torsion thiab vibration damper, nyob rau hauv lub cav mounts, tshuab bearings, diaphragms thiab damping ntsiab.