Polyurea-reinforced polyacrylonitrile |
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| Authors: | Byung Kyu Kim Young Se Oh Young Min Lee |
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| Affiliation: | 1. Department of Polymer Science and Engineering , Research Institute of Industrial Technology, Pusan National University , Pusan, 609-735, Korea;2. Research and Development Center , Hanil Synthetic Fiber , Masan, 630-791, Kyungnam, Korea |
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| Abstract: | Polyacrylonitrile (PAN) fibers were reinforced with three different types of polyurea (PU), which were synthesized in the presence of PAN dissolved in dimethyl formamide (DMF) (referred to as an in situ blend). Solution viscosity increased with increasing PU content, with viscosity yield seen at high PU content and an extended Newtonian plateau at low PU content. The reinforcing effect was greater with linear PUs, among which PU prepared from toluene diisocyanate (TDI) and ethylene diamine (EDA) gave the greatest improvement. |
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| Keywords: | In situ blend Mechanical and dynamic mechanical properties Polyacrylonitrile (PAN) Polyurea (PU) SEM |
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