The Influence of Acrylic Acid Groups on the Microstructure of HDPE/PS/clay System Studied by Positron Annihilation
Two types of composites-an immiscible blend, high density polyethylene/ polystyrene (HDPE/PS) with clay, and a compatibilized blend, high density polyethylene grafted with acrylic acid/PS (PEAA/PS) with clay-were prepared via melt compounding. X-ray diffraction (XRD) results revealed that the dispersion of clay in compatibilized blends was better than immiscible blends. Positron annihilation lifetime spectroscopy (PALS) has been utilized to investigate the microstructure of two types of composites. The ortho-positronium (o-Ps) intensity for PEAA/PS was lower than that for HDPE/PS. With the increase of clay content, the o-Ps intensity increased for PEAA/PS/clay composites and the o-Ps intensity decreased for HDPE/PS/clay composites. It was found that the carboxyl group of Acrylic acid played a significant chemical inhibition on positronium formation. The results provided an evidence for that the chain segments with carboxyl group would be easier to intercalate the gallery of silicates.
grafting high density polyethylene polystyrene microstructure positron annihilation
Hongmei Wang Zhe Chen Pengfei Fang Shaojie Wang
Jiaxing University,Jiaxing 314001,P.R.China Department of Physics,Wuhan University,Wuhan 430072,P.R.China
国际会议
第九届国际正电子与正电子素国际会议(9th International Workshop on Positron and Positronium Chemistry)(PPC–9)
武汉
英文
78
2008-05-11（万方平台首次上网日期，不代表论文的发表时间）