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Polycarbonate/phenoxy blends: Physical behavior and development of interchange reactions in melt‐processing conditions
Author(s) -
Mondragón I.,
Gaztelumendi M.,
Nazábal J.
Publication year - 1986
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.760262103
Subject(s) - polycarbonate , materials science , miscibility , differential scanning calorimetry , glass transition , branching (polymer chemistry) , copolymer , composite material , polymer , polymer chemistry , thermodynamics , physics
Abstract The miscibility of the polycarbonate of bisphenol A with the polyhydroxyether of bisphenol A was analyzed using differential scanning calorimetry and the, results are compared with the torque data obtained using a Brabender Plasticorder. The possibility of interchange reactions was analyzed by means of the observation of the melt‐viscosity variation versus processing time in the mixer‐bowl. These reactions form graft‐copolymers that develop into crosslinked copolymers at higher residence times. It was also shown that the speed of these reactions depends on the processing temperature. The variation produced on the glass‐transition temperature because of branching was also analyzed.