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Miscibility, morphology and tensile properties of vinyl chloride polymer and poly(ε‐caprolactone) blends
Author(s) -
Chiu FangChyou,
Min Kyonsuku
Publication year - 2000
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/(sici)1097-0126(200002)49:2<223::aid-pi345>3.0.co;2-u
Subject(s) - miscibility , materials science , ultimate tensile strength , vinyl chloride , caprolactone , melting point depression , polyvinyl chloride , morphology (biology) , polymer blend , glass transition , chlorine , polymer chemistry , polymer , composite material , melting point , chemical engineering , copolymer , biology , engineering , genetics , metallurgy
The miscibility, morphology and tensile properties of three blend systems of poly(ε‐caprolactone) (PCL) with poly(vinyl chloride) (PVC) and with two chlorinated PVCs (CPVCs) with different chlorine contents (63 wt% and 67 wt% of Cl) have been studied. Based on the shifts of single glass transition temperature, the Gordon–Taylor K parameter is calculated as a measurement of interaction strength between PCL and (C)PVCs. Higher K values are found for blends of (C)PVCs with higher chlorine content, together with the interaction χ parameters estimated from the melting point depression results. The morphology observed with polarized light microscopy shows that spherulites exist in blends rich in PCL (≥50 wt%) only. Wide angle X‐ray diffraction studies indicate that the crystal structure of PCL is independent of the Cl content of (C)PVCs. The tensile properties of various blends exhibit a minimum as the PCL content increases. The elongation at break increases with increasing PCL content. © 2000 Society of Chemical Industry