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Poly(ethylene terephthalate)/polypropylene reactive blends through isocyanate functional group
Author(s) -
Bae TaekYoon,
Park KangYeol,
Kim DongHyun,
Suh KyungDo
Publication year - 2001
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.1527
Subject(s) - compatibilization , materials science , polypropylene , polymer chemistry , ethylene , absorption of water , ultimate tensile strength , isocyanate , polymer blend , isophorone diisocyanate , copolymer , chemical engineering , composite material , polyurethane , chemistry , organic chemistry , polymer , catalysis , engineering
To evaluate the compatibilization effects of an isocyanate group on poly(ethylene terephthalate)/polypropylene (PET/PP) blends through a reactive blend, PP grafted with 2‐hydroxyethyl methacrylate‐isophorone diisocyanate (PP‐ g ‐HI) was prepared and blended with PET. In view of the blend morphology, the presence of PP‐ g ‐HI reduced the particle size of the dispersed phase by the reduced interfacial tension between the PP and PET phases, indicating the in situ copolymer (PP‐ g ‐PET) generated during the melt blending. The DSC thermograms for the cooling run indicated that the PET crystallization in the PP‐ g ‐HI rich phase was affected by the chemical reactions of PET and PP‐ g ‐HI. The improved mechanical properties for the PET/PP‐ g ‐HI blends were shown in the measurement of the tensile and flexural properties. In addition, the water absorption test indicated that the PET/PP‐ g ‐HI blend was more effective than the PET/PP blend in improving the water resistance of PET. The positive properties of PET/PP‐ g ‐HI blends stemmed from the improved compatibilization of the PET/PP blend. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 81: 1056–1062, 2001