TSIAJ yog milky dawb los yog lub teeb daj siab heev crystalline polymer nrog tus du thiab ci nto. Creep tsis kam, qaug zog tsis kam, abrasion tsis kam, zoo ruaj ntseg seem, tsis tshua muaj abrasion thiab siab hardness, nrog cov tawv zoo tshaj plaws ntawm cov thermoplastics: cov hluav taws xob zoo hluav taws xob, tsis tshua muaj kev kub hloov, tab sis tsis zoo corona tsis kam. Cov mob tsis muaj tshuaj lom, huab cua tsis kam, zoo tshuaj lom neeg ruaj khov, tsis tshua muaj dej, ua kom cov kua qaub qaug zog thiab cov kuab tshuaj organic, tab sis tsis raus rau hauv dej kub thiab alkali.
PET resin muaj lub iav hloov pauv kub, qeeb qeeb crystallization ceev, ntev molding voj voos, ntev lub voj voog moulding, loj molding shrinkage, tsis zoo ntau qhov ruaj khov, crystallization molding yog nkig, thiab tsis kub tsis kam.
Los ntawm kev txhim kho ntawm tus neeg sawv cev nucleating, crystallization tus neeg sawv cev thiab tsom iav fiber ntau, PET muaj cov yam ntxwv hauv qab no ntxiv rau cov yam ntxwv ntawm PBT.
1. Cov cua sov ua kom sov tsis sib txawv thiab siv ntev hauv qhov kub thiab txias yog qhov ntau tshaj ntawm cov thermoplastic general engineering plastics.
2. Vim tias nws cov cua sov ua haujlwm siab, qhov PET reinforced yog nqus dej rau hauv lub dab da dej kub ntawm 250 ° C li 10 vib nas this. Nws yuav tsis yog deforms lossis discolors. Nws yog qhov tshwj xeeb tshaj yog kev npaj rau hauv cov khoom siv hluav taws xob thiab hluav taws xob rau kev ua lag luam soldering.
3. Lub zog khoov yog 200MPa, cov txheej txheem elastic ncav cuag 4000MPa, nkag thiab qaug zog tiv thaiv kuj tseem zoo, lub ntsej muag hardness yog siab, thiab cov cuab yeej zoo yog zoo li thermosetting plastics.
4. Txij li thaum tus nqi ntawm ethylene glycol siv nyob rau hauv kev tsim cov PET yog yuav luag ib nrab tus nqi ntawm butylene glycol siv nyob rau hauv kev tsim khoom ntawm PBT, PET resin thiab reinforced PET yog qhov pheej yig tshaj plaws ntawm engineering plastics thiab muaj tus nqi ua haujlwm siab.
Txhawm rau txhim kho cov yam ntxwv ntawm PET, PET tuaj yeem ua alloys nrog PC, elastomers, PBT, PS, ABS, thiab PA.
Tus tsiaj (txhim kho PET) feem ntau ua tiav los ntawm kev txhaj tshuaj molding. Lwm txoj hauv kev suav nrog kev ua cov theem nrab xws li extrusion, tshuab moulding, txheej thiab vuam, sib khi, ua haujlwm, thiab lub tshuab nqus tsev txheej. Nws yuav tsum tau tag nrho kom qhuav ua ntej kev txhaj tshuaj.
Polyethylene terephthalate yog muab tso ua ke los ntawm transesterification ntawm dimethyl terephthalate thiab ethylene glycol lossis esterification ntawm terephthalic acid thiab ethylene glycol los coj los ua ke bishydroxyethyl terephthalate ua ntej kev ua. Npaj los ntawm polycondensation cov tshuaj tiv thaiv. Nws yog lub ntsej muag crystalline sat polyester nrog qhov nruab nrab molecular phaus (2-3) × 104, thiab qhov ntsuas ntawm qhov hnyav nruab nrab rau cov lej nruab nrab molecular phaus yog 1.5-1.8. Lub khob hloov kub yog 80 ° C, Martin tiv thaiv tshav kub yog 80 ° C, qhov kub hloov hluav taws xob kub yog 98 ° C (1.82MPa), thiab qhov ua rau kub decomposition yog 353 ° C. Nws muaj cov cuab yeej zoo tshaj plaws, cov khoom siv ruaj khov, lub hardness siab, nqus dej tsawg thiab ua kom zoo seem ntev. Zoo toughness, cuam tshuam ua hauj, txhuam tsis kam thiab nkag siab. Tshuaj lom neeg tsis zoo, soluble hauv cresol, concentrated sulfuric acid, nitrobenzene, trichloroacetic acid, chlorophenol, insoluble hauv methanol, ethanol, acetone, thiab alkanes. Kev khiav hauj lwm muaj kub -100～120℃, khoov zog 148-310MPa.
Kev nqus dej: 0.06% -0.129%
Qhov cuam tshuam rau lub zog: 64.1-128J / m
Rockwell hardness: M 90-95
Elongation: 1.8% -2.7%