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Influence of molecular weight on some properties of poly(vinyl chloride)
Author(s) -
Pezzin Giovanni,
Zinelli Giuseppe
Publication year - 1968
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1968.070120511
Subject(s) - vinyl chloride , polymer , creep , materials science , ultimate tensile strength , modulus , fractionation , polymer chemistry , composite material , stress (linguistics) , strain (injury) , polyvinyl chloride , chemical engineering , chemistry , organic chemistry , copolymer , medicine , linguistics , philosophy , engineering
Several fractions obtained from a large‐scale fractionation and several unfractionated PVC polymers and blends have been processed both as rigid and plasticized compounds. The latter have been studied by stress–strain, creep, and recovery tests. The recoverable character of the creep results show that a relatively stable network must be present in the samples. The crosslink density is little influenced by molecular weight, as shown by the modulus and compliance results. On the contrary, the ultimate tensile properties depend strongly on molecular weight, which is interpreted as evidence that the stability of the crosslinks increases with increasing chain length of the polymers.