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Suppressing shrinkage/warpage of PBT injection molded parts with fillers
Author(s) -
Xie Zhouhao,
Wu Xianghong,
Giacomin A. Jeffrey,
Zhao Guoqun,
Wang Weihua
Publication year - 2018
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.24218
Subject(s) - materials science , shrinkage , composite material , polybutylene terephthalate , filler (materials) , crystallinity , differential scanning calorimetry , scanning electron microscope , polyester , physics , thermodynamics
Polybutylene terephthalate (PBT) was chosen as the model polymer for studying the method of polymer modification in purpose of suppressing shrinkage and warpage with fillers. With high crystallinity, injection molded PBT products would easily be distorted by anisotropic shrinkage or residual stress. In this article, glass fiber, talcum, calcium carbonate, wollastonite powder were filled into PBT to make composites, and the roles of filler types, filler compositions, and feeding methods for filler incorporation were explored by studying the performance of the resulted composites. The samples were also investigated with differential scanning calorimetry and scanning electronic microscopy. It is shown that uniform shrinkage and enhanced mechanical performance can be obtained. POLYM. COMPOS., 39:2377–2384, 2018. © 2016 Society of Plastics Engineers