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Thermodynamic probe of intermolecular coupling in the interphase region of glass fiber reinforced polymer composites
Author(s) -
Karian Harutun G.
Publication year - 1995
Publication title -
journal of vinyl and additive technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 1083-5601
DOI - 10.1002/vnl.730010414
Subject(s) - interphase , materials science , composite material , ultimate tensile strength , intermolecular force , polymer , coupling (piping) , glass fiber , fiber , polypropylene , molecule , chemistry , genetics , organic chemistry , biology
Mechanical properties of polymer composites are enhanced by an interphase having a brush‐like structure, due to the entanglement of stretched compatibilizer chains and neighboring polymer molecules. Lipatov's model provides a calorimetric method for characterizing the fiber‐matrix interactions and determining the interfacial thickness, i.e., the heat capacity jump at T g is sensitive to the combined effects of fiber glass content and intermolecular coupling in the interphase region. By a correlation between computed interfacial thickness from DSC methodology and measured tensile strength, we have a quantitative means to develop polypropylene composites having “mega coupled” tensile behavior.