CLC number: O631.1
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Received: 1999-01-12
Revision Accepted: 1999-10-21
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BAO Yong-zhong, WENG Zhi-xue, HUANG Zhi-ming, PAN Zu-ren. EFFECTS OF PHYSICAL CROSSLINKING ON PROPERTIES OF PLASTICIZED HIGH MOLECULAR WEIGHT PVC[J]. Journal of Zhejiang University Science A, 2000, 1(2): 171-177.
@article{title="EFFECTS OF PHYSICAL CROSSLINKING ON PROPERTIES OF PLASTICIZED HIGH MOLECULAR WEIGHT PVC",
author="BAO Yong-zhong, WENG Zhi-xue, HUANG Zhi-ming, PAN Zu-ren",
journal="Journal of Zhejiang University Science A",
volume="1",
number="2",
pages="171-177",
year="2000",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.2000.0171"
}
%0 Journal Article
%T EFFECTS OF PHYSICAL CROSSLINKING ON PROPERTIES OF PLASTICIZED HIGH MOLECULAR WEIGHT PVC
%A BAO Yong-zhong
%A WENG Zhi-xue
%A HUANG Zhi-ming
%A PAN Zu-ren
%J Journal of Zhejiang University SCIENCE A
%V 1
%N 2
%P 171-177
%@ 1869-1951
%D 2000
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2000.0171
TY - JOUR
T1 - EFFECTS OF PHYSICAL CROSSLINKING ON PROPERTIES OF PLASTICIZED HIGH MOLECULAR WEIGHT PVC
A1 - BAO Yong-zhong
A1 - WENG Zhi-xue
A1 - HUANG Zhi-ming
A1 - PAN Zu-ren
J0 - Journal of Zhejiang University Science A
VL - 1
IS - 2
SP - 171
EP - 177
%@ 1869-1951
Y1 - 2000
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.2000.0171
Abstract: A series of high molecular weight PVC (HMW-PVC) resin was synthesized by suspension process at various temperatures and compounded to prepare plasticized HMW-PVC. Plasticized HMW-PVC is physically crosslinked by microcrystallites and chain entanglements. The molecular weight and degree of crystallinity of PVC resin increase with decrease of polymeri-zation temperature. More dense physical crosslinking networks are formed in plasticized PVC with the decrease of polymerization temperature of PVC resin. Plasticized HMW-PVC exhibits thermal reversible processability, but the gelation temperature and melt viscosity increase with increasing physical crosslinking density. physical crosslinking also has great effects on the mechanical properties of plasticized HMW-PVC. The compression set and deformation decrease as molecular weight and crystallinity of PVC resin increase, but the softening temperature and tensile strength increase. The crosslinking network of plasticized HMW-PVC is more similar to the dissociable network of gels than to the permanent network of crosslinked rubber and is not stable under stretching at high stress.
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