Block copolymers of telechelic poly(phenylene sulfide) and semiaromatic thermotropic liquid crystalline polyester segments

Abstract

We report the synthesis and characterization of copolymers comprising poly(phenyl sulfide) (PPS) blocks and semiaromatic thermotropic liquid crystalline polymer (TLCP) blocks. The copolymers, synthesized by melt‐transesterification of dicarboxy‐terminated poly(phenylene sulfide) with poly(ethylene terephthalate‐co‐oxybenzoate) (PET/OB), were characterized using Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), X‐ray diffraction (XRD), and polarized light optical microscopy (PLOM). The crystallizability and liquid crystalline properties of the copolymers are greatly influenced by the extent of interchange reactions, the mole percent of oxybenzoate with respect to the PET, the PPS : PET/OB weight ratio, and the reaction time. © 1998 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 36: 2707–2713, 1998

Synergetic toughening of poly(phenylene sulfide) by poly(phenylsulfone) and poly(ethylene‐ran‐methacrylate‐ran‐glycidyl methacrylate)

“…Examples of the first case include blends of PPS modified by diphenylmethane diisocyanate (MDA) and ethylene copolymer elastomer containing maleic anhydride, 8 dicarboxyl-terminated modified PPS and wholly aromatic thermotropic liquid crystalline polymers. 9,10 The second case is a PPS reactive blend with maleic anhydridemodified styrene-ethylene-styrene block copolymer, 11 poly(ethylene-stat-glycidyl methacrylate)-graft-poly(acrylonitrile-stat-styrene), 12 and polyethylene grafted glycidyl methacrylate. 7 Oyama et al found that the size of the phase structure was reduced and the impact strength increased by reactive blending with a series of ethylenegrafted glycidyl methacrylate such as poly(ethylene-ranmethacrylate-ran-glycidyl methacrylate) (EGMA).…”

“…In the case of PPS, there are two possibilities: One in which a reactive functional group is added to the PPS and reactively blended with another polymer; and the other in which a polymer in a reactive functional group is reactively blended with PPS. Examples of the first case include blends of PPS modified by diphenylmethane diisocyanate (MDA) and ethylene copolymer elastomer containing maleic anhydride, 8 dicarboxyl‐terminated modified PPS and wholly aromatic thermotropic liquid crystalline polymers 9,10 . The second case is a PPS reactive blend with maleic anhydride‐modified styrene‐ethylene‐styrene block copolymer, 11 poly(ethylene‐ stat ‐glycidyl methacrylate)‐ graft ‐poly(acrylonitrile‐ stat ‐styrene), 12 and polyethylene grafted glycidyl methacrylate 7 .…”