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A study of the synergism of poly(vinyl chloride)/polyether‐ester blends
Author(s) -
Ellis Candace L.,
Barry Carol M. F.
Publication year - 1996
Publication title -
journal of vinyl and additive technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 1083-5601
DOI - 10.1002/vnl.10149
Subject(s) - materials science , izod impact strength test , melt flow index , composite material , differential scanning calorimetry , vinyl chloride , shear rate , polymer blend , elastomer , rheometer , elongation , polymer , rheology , copolymer , ultimate tensile strength , thermodynamics , physics
The synergism between blends of poly(vinyl chloride), PVC, and a polyether‐ester elastomer, COPE, was investigated. Previous research indicated that blends of these two polymers produced synergistic results in the melt index and Izod impact properties of the system. This research confirmed the increased flow properties of the blends using melt index, capillary rheometer, and dynamic mechanical analysis. The synergism was found to be shear rate dependent and an additive relationship was approached at high shear rates. Differential scanning calorimetry showed that the blends were immiscible. This suggested that phase separation was the cause of the synergism in the flow properties and that elongation of the COPE domains most likely produced the shear rate dependency of the blend synergism. The phase separation would also have produced the improvement in the Izod impact properties of the blends.