PVC cob yog cov khoom siv tawv thiab nkig nrog lub zog tsis zoo, feem ntau tsuas yog 3-5kJ / m.Qhov laj thawj tseem ceeb ntawm qhov xav tau los txhim kho qhov cuam tshuam rau lub zog yog nws qhov rhiab heev rau qhov sib txawv, tab sis kuj los txhim kho qhov qis. Tam sim no, los ntawm PVC polymer sib tov tiv thaiv kev hloov kho tshuab, tuaj yeem ua kom tawv tawv tawv tawv PVC, hom kev hloov kho no yog ib qho kev sib raug zoo nrog PVC polymer elastomer, nws tuaj yeem ua rau kev sib xyaw ua ke tuaj yeem tswj tau UPVC siab modulus. , siab rigidity, thiab tuaj yeem txhim kho qhov sib txawv ntawm qhov sib txawv, pom tseeb txhim kho qhov kub tsis tshua muaj kev cuam tshuam kev siv zog.Tam sim no, cov khoom siv PVC feem ntau yog chlorinated polyethylene (CPE)
CPE, chloride polyethylene, los ntawm ib feem ntawm HDPE chloride vim muaj cov tshuaj chlorine atoms, CPE muaj softness thiab ib co roj hmab zog, thiab ua rau CPB los ua ib tug polar polymer thiab muaj tib lub polar pawg nrog PVC, ua rau muaj kev sib raug zoo nrog PVC, yog li cov polymer. Cov saw muaj peev xwm tuav tau lub zog loj txaus van der Waals los txhim kho qhov cuam tshuam ntawm PVC, ua si lub luag haujlwm toughening.Ntxiv mus, CPE muaj cov haujlwm ntawm kev txhawb nqa PVC melting thiab nrawm plasticizing, thiab nrog kev nce ntawm CPE ntau npaum, lub sij hawm yas shortens cov yas. torque, qhov sib npaug torque nce, thiab viscosity ntawm cov yas yaj nce. Chlorinated polyethylene (CPE) yog cov hmoov khoom siv HDPE hauv cov dej theem. Nrog rau qhov nce ntawm chlorination degree, lub hauv paus crystalline HDPE maj mam dhau los ua ib qho tsis-crystalline elastomer.Rau CPE siv los ua ib qho tougher, cov ntsiab lus C1 feem ntau yog 25-45 feem pua .CPE muaj ntau qhov chaw thiab cov nqi qis. Ntxiv nrog rau nws cov nyhuv toughening, nws kuj muaj kev tiv thaiv txias, huab cua tsis kam, nplaim hluav taws thiab tshuaj tiv thaiv.Tam sim no, CPE yog qhov tseem ceeb ntawm kev hloov pauv hauv Suav teb, tshwj xeeb tshaj yog hauv kev tsim cov kav dej PVC thiab cov profiles, thiab feem ntau cov chaw tsim khoom siv CPE. Tus nqi ntxiv yog feem ntau yog 5- -15 daim ntawv luam.CPE tuaj yeem siv nrog rau lwm cov tshuaj tawv tawv, xws li roj hmab thiab EVA, nrog cov txiaj ntsig zoo dua, tab sis cov khoom siv roj hmab tsis tiv thaiv kev laus.
