纤维诱发聚醚醚酮界面结晶效应的研究

Investigations on Interfacial Crystallization Effects of PEEK Nucleated by Fibers

用彩色偏光显微镜研究了各种纤维诱发聚醚醚酮界面结晶效应。结果表明结晶性纤维诱发聚醚醚酮界面横晶的能力大于非结晶性纤维,温度对纤维诱发聚醚醚酮形成界面横晶有重要影响。考察了应力诱发结晶特征。

By using colour polarized microscopic technique,the effects of graphite fiber (M40GrF),surfacial-oxidized M40GrF(S-M40GrF),high strength carbon fiber (T300CF),middle strength carbon fiber(MSCF),Kevlar-49 fiber,SiC fiber(SiC- F)and glass fiber(GF)on the crystallization of polyetheretherketone(PEEK)have been studied.It has been found that PEEK can be nucleated and form transcrystal- linity around these fibers,and the nucleating abilities of these fibers depend on their structures.The nucleating ability of M40GrF is the highest,and those of SiC-F and GF are the lowest.Dependence of the transcrystalline structure around these fibers on crystallization temperature has also been found.In this paper,the inter- facial stress is considered to be an important factor affecting the nucleation.With the discovery of transcrystallinity in absence of fibers but in presence of some ditches,the stress and its effect in such system has been discussed.