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Miscibility in cyclic poly(butylene terephthalate) and styrene maleimide blends prepared by solid‐dispersion and in situ polymerization of cyclic butylene terephthalate oligomers within styrene maleimide
Author(s) -
Samsudin Sani A.,
Kukureka Stephen N.,
Jenkins Mike J.
Publication year - 2012
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.36918
Subject(s) - miscibility , maleimide , materials science , differential scanning calorimetry , polymer chemistry , styrene , crystallization , polymerization , copolymer , glass transition , in situ polymerization , chemical engineering , composite material , polymer , thermodynamics , physics , engineering
Blends of cyclic butylene terephthalate oligomers (CBT) and styrene maleimide (SMI) were prepared by a solid dispersion technique in various compositions ranging from 90 to 10 wt % of CBT. In situ polymerization of the oligomers in the blend at 190°C produced a blend of cyclic poly(butylene terephthalate) (c‐PBT) and SMI. The blends were characterized by a variety of techniques including differential scanning calorimetry (DSC) and scanning electron microscopy (SEM). It was found that the presence of 30 wt % and above of SMI impeded the crystallization of c‐PBT to such an extent that crystallization could not be detected under the conditions of the DSC experiment. The blend system exhibited a single composition‐dependent glass transition temperature ( T g ), which indicated the presence of miscibility. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012