Premium
The effect of the side chain of acrylate comonomers on the orientation, pore‐size distribution, and properties of polyacrylonitrile precursor and resulting carbon fiber
Author(s) -
Tsai JinShy,
Lin ChungHua
Publication year - 1991
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.1991.070421123
Subject(s) - comonomer , polyacrylonitrile , materials science , fiber , acrylate , polymer chemistry , side chain , methyl acrylate , crystallinity , carbonization , composite material , polymer , copolymer , scanning electron microscope
Abstract The side‐chain size of acrylate comonomer in polyacrylonitrile (PAN) precursor markedly influences the microstructure of PAN fiber and its resulting carbon fiber. In this paper, we propose that the model of the crystal orientation of PAN precursor and its resulting carbon fiber can explain the effect of the side‐chain size of acrylate comonomer on the orientation of PAN fiber and carbon fiber. When PAN precursor contains a larger side chain of comonomer, PAN precursor has the preferred crystal orientation and higher crystallinity and the orientation of its resulting carbon fiber unexpectedly decreases. This is because the larger the side chain is, the lower is the orientation of the amorphous region of PAN fiber; as a result, the average orientation after carbonization decreases. In the same mole fraction of comonomer, the carbon fiber based on PAN precursor with a smaller side chain of acrylate comonomer has better mechanical properties and higher yield.