Qhov zoo thiab qhov tsis zoo ntawm cov thermoplastic resins
Ua ntej: Tej yam ua tau zoo. Thermoplastics nrog kev ua tau zoo heev tej zaum yuav muaj txog li 10 npaug ntau dua li tiv thermoset plastics.
Thib ob: muaj zog heev. Piv txwv, cov thermoplastic hauv thooj sov hauv chav sov yog nyob hauv ib qho khoom hauv lub cev. Thaum muaj cua sov los yog kev ywj pheej, cov thermoplastic yas hloov cev nqaij daim tawv thiab lub fiber ntau zog. Lub hnab yas thermosetting yuav tsum tau chem kom haum qhov kev hloov no.
Ntawm cov khoom txhua hnub, tej zaum yuav muaj ntau lub ntiaj teb ntawm cov thermoplastics. Lub reversibility ntawm nws lub cev hloov tau txiav txim xyuas qhov tsim kho ntawm cov ntaub ntawv no. Piv txwv, lub pas nqaim tha plab thim ncaj nraim tuaj yeem raug muab rov los ua ib tus pas nrig ntawm cua sov. Rau cov thermoset plastics, nws yeej ua tsis tau. Qhov zoo ntawm cov thermoplastics pub lawv cov khoom pov tseg kom rov siv.
Nyob rau hauv tej yam ntuj tso, thermoplastics yog solid thiab nws yog qhov nyuaj rau cov tsim muaj zog reinforced. Yog tias cov thermoplastic resin yog los tsim cov khoom siv fais fab, nws yuav tsum tau ua kom sov so rau ntawm qhov chaw txias thaum nyob hauv ib qho kev mob siab thiab txias txias hauv qab lub siab. Cov txheej txheem no yog cov nyuab nyuab heev thiab tsis yooj yim dua cov pa tshuaj thermosetting. Lub zog reinforcement ntawm thermoplastics yuav tsum tau siv cov cuab yeej tshwj xeeb, cov cuab yeej kim tshuab thiab cov khoom kom ua tau zoo, yog li cov kev pabcuam nyiaj txiag tsis zoo.
Thawv tawm qhov ntxa khoom thiab qhov zoo thiab qhov tsis zoo
Tam sim no, feem ntau siv cov thermosetting resin yog polyester resins, raws li cov vinyl esters thiab epoxy resins.
Ua ntej, ib daim duab uas yog kua hauv tsev sov yog qhov yooj yim ua. Hauv cov txheej txheem ntau lawm, nws yog ib qho yooj yim uas muab cov cua tso rau hauv lub thawv tshuaj thermosetting los ntawm kev siv lub tshuab tshuab raj. Nyob rau tib lub sijhawm, lub thawv tshuaj thermosetting ua rau kev siv lub tshuab nqus tsev twj los yog lub tshuab fais fab kom zoo, ua kom zoo dua qub.
Ntxiv rau qhov zoo ntawm kev ua tau yooj yim, thermosetting resins yog dav siv nyob rau hauv lub chaw ua khoom ntawm ntau yam pwm kaw vim lawv cov nqi raw khoom raw thiab kev ua tau zoo heev.
Ntxiv mus, thermosetting reagents yuav siv tau los tsim cov fiberglass reinforcing, nrog rau cov khoom siv loj (piv txwv li, composit-based composites) ua cov ntaub ntawv sib xyaw. Ntau cov khoom siv yas thermosetting siv fiber ntau reinforcements xws li iav fiber, carbon fiber, phom basalt los yog aramid los txhim kho lawv txoj kev kho. Cov khoom no muaj qhov zoo ntawm lub cev nyhav thiab siab zog. Lawv tau ua tus thawj coj los ua kom cov kev sib tw ua tiav hauv peb qho khoom sib txawv hauv cov voj voog, thiab maj mam tsim lawv cov ntawv hauv cov aviation, tsheb thiab kev lag luam.
Nyob rau hauv xyoo tas los no, muaj qee cov qauv hauv cov thermoplastic reins thiab cov fibers uas nruam siv los tsim cov khoom ua ke tshiab. Cov thermoplastics muaj ib co kev pom zoo rau cov thermosetting plastics, tiam sis muaj ntau yam tsis tuaj yeem tsis quav ntsej.
Txawm li cas los xij, thaum cov tshuaj thim rov hla thim rov qab los thiab kho, nws tsis tuaj yeem ua thim rov qab thiab tsis tuaj yeem rov qab tuaj yeem ntxiv. Yog li, lub thawv tshuaj thermosetting yog ib cov khoom uas siv tau thiab tsis yooj yim dua qub thiab rov qab siv dua. Txawm li cas los xij, ntau lub tuam txhab tau tshaj tawm tau hais tias lawv tau ua tiav cov khoom pov tseg ntawm cov khoom pov tseg los ntawm kev kub ntxhov siab thiab ua kom tiav rov qab fibers.
Tam sim no, kev siv tshuab thermosetting plastics thiab thermoplastics ntau lawm. Hauv kev tsim khoom thiab lub neej, ob qho tib si muaj lawv qhov chaw thiab ua lawv txoj haujlwm. Kuv ntseeg tias yav tom ntej ntawm cov ntaub ntawv, ob leeg yog qhov tseem ceeb.
