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Impact modification of poly(vinyl chloride) with chlorinated polyethylene II. Irreversible deformation
Author(s) -
Siegmann A.,
English L. K.,
Baer E.,
Hiltner A.
Publication year - 1984
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760241107
Subject(s) - materials science , crazing , composite material , vinyl chloride , polyethylene , environmental stress cracking , polyvinyl chloride , natural rubber , void (composites) , polymer , copolymer , corrosion , stress corrosion cracking
The mechanical behavior of chlorinated polyethylene (CPE)‐modified poly(vinyl chloride) (PVC) has been determined. The nature of the irreversible deformation processes which are responsible for mechanical energy absorption has been investigated by optical and electron microscopic techniques. Addition of CPE results in a decrease in the shear band initiation stress and an increase in void density and stability. The crazing to shear banding transition is observed at a blend composition between 2 and 7 percent CPE at the strain rate employed. It has been established that voiding occurs in the CPE rubber phase. Voiding accounts for at least part of the increased energy absorption of the blend. The stability of the voids to coalescence and fracture is attributed to strong adherence of the CPE to the primary PVC particles.