Impact of Poly(Styrene-co-Methyl Acrylate) on the Compatibility of Polylactide/SBS Blends
WANG Bocheng, LIU Wei, TU Zheng, WU Chonggang, SHI Biao, HU Tao, GONG Xinghou
Collaborative Innovation Center of Green Light-weight Materials and Processing, and School of Materials and Chemical Engineering, Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology, Wuhan 430068
Abstract: Taking random copolymer poly(styrene-co-methyl acrylate) (PSMA) (nSt∶nMA=75∶25) as compatibilizer, we conducted the melt blending of the polylactide (PLA) and the triblock copolymer styrene-butadiene-styrene (SBS) on a twin-screw extruder, and explored the impact of PSMA content on the compatibility of PLA/SBS (mPLA∶mSBS=90∶10) blends. Furthermore, the scanning electron microscope, universal tensile testing machine, differential scanning calorimeter and rotary rheometer were employed to characterize the microstructure, mechanical properties, thermal properties and rheological properties of PLA/SBS blends. It could be observed by SEM that adding 1wt% PSMA enabled uniform dispersion of SBS in PLA/SBS blends and enhanced the interfacial adhesion of PLA/SBS blends as well. Meanwhile, the elongation and impact strength of PLA/SBS blends with 1wt% PSMA were 7.1 and 2.3 times of those of pure PLA, respectively. Besides, DSC and rheological results indicated an improved compatibility of PLA and SBS by the addition of PSMA.
王博成, 刘桅, 涂征, 吴崇刚, 石彪, 胡涛, 龚兴厚. 苯乙烯-丙烯酸甲酯共聚物对聚乳酸/SBS共混物相容性的影响[J]. 材料导报, 2019, 33(22): 3833-3836.
WANG Bocheng, LIU Wei, TU Zheng, WU Chonggang, SHI Biao, HU Tao, GONG Xinghou. Impact of Poly(Styrene-co-Methyl Acrylate) on the Compatibility of Polylactide/SBS Blends. Materials Reports, 2019, 33(22): 3833-3836.