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Phase morphology evolution and thermally conductive networks of immiscible polymer blends
Author(s) -
Zhang Yang,
Xie Hao,
Zhang Xuan,
Zhang Xianlong,
Guo Shaoyun
Publication year - 2021
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.49969
Subject(s) - materials science , composite material , phase (matter) , thermal conductivity , polymer blend , compatibilization , polymer , morphology (biology) , thermal , filler (materials) , copolymer , chemistry , thermodynamics , organic chemistry , physics , biology , genetics
The selective distribution of fillers in multi‐phase polymer blends was dramatically studied to deal with thermal management fields issues. Concerning thermodynamic and kinetic effects of fillers on immiscible polymer blends, the compatibilization of fillers on phase morphology evolution and final construction of thermal conductive pathways were rarely discussed. In this work, BN fillers and polar dispersed phase were introduced into PE through various processing methods. The result showed that filler‐coated shell was formed around the larger‐sized dispersed phase, thereby forming more thermal conductivity network with other fillers in the two‐step processing composites. When the BN content was 20 phr, the thermal conductivity was 0.8271 W/(m·K) for PE/PA6/BN‐two steps composites, which was 95.48% higher than that of PE/PA6 composites. From the perspective of the regulation of the morphological structure of the dispersed phase, this study can provide methods and basic data for improving the thermal conductivity of incompatible polymer blends.