Mechanical properties and morphology of polymer blends of poly(ethylene terephthalate) and semiflexible thermotropic liquid crystalline polyesters
1992; Wiley; Volume: 32; Issue: 1 Linguagem: Inglês
10.1002/pen.760320112
ISSN1548-2634
AutoresBoo Young Shin, Sang Hee Jang, In Jae Chung, Bong Shik Kim,
Tópico(s)Synthesis and properties of polymers
ResumoAbstract Two thermotropic liquid crystalline polyesters (TLCPs) with long flexible spacer groups in the main chain were prepared by melt polymerization: one was a homopolymer with only decane groups (LCPHO) and the other was a copolymer with hexane or decane groups (LCPCO) between mesogen units. These polyesters were blended with a matrix polymer of poly(ethylene terephthalate) (PET). Scanning electron microscopy (SEM) revealed the excellent interfacial adhesion between polyester and PET, and the large aspect ratio of polyester microfibrils in the blend fiber made by extruding and drawing the blend through a die. The aspect ratio was estimated by using the modified Halpin‐Tsai equation. The fiber with LCPHO showed more extensive fibril formation than that with LCPCO.
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