Largely Improved Mechanical Properties of a Poly(styrene-b-isoprene-b-styrene) Thermoplastic Elastomer Prepared under Dynamic-Packing Injection Molding
作者： Yongsheng Zhao , Bin Su , Licai Zhong , Feng Chen , Qiang Fu
DOI: 10.1021/IE5022514
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摘要: In this work, a poly(styrene-b-isoprene-b-styrene) thermoplastic elastomer was processed via novel processing technique, dynamic-packing injection molding (DPIM). The shear cessation time is variable during DPIM, and conventional injection-molded sample (C-sample) prepared for comparison. For the (D-sample) with short time, high Young’s modulus obtained but no significant enhancement of break strength relative to C-sample. However, improvement achieved D-sample longer time. mechanical performance both C-sample D-samples interpreted from contribution polyisoprene (PI, as matrix) polystyrene (PS, dispersed phase) segments. It proposed that (strong shear) can induce formation stretched PI network, while prolonged (more relaxation) could result in segregation PS microd...
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