SBS粉体预辐射接枝丙烯酸研究  

Pre-irradiation-induced grafting of acrylic acid onto SBS powder

作　　者：李建喜[1] 李林繁[2] 杨性坤[1] 李吉豪[2] 虞鸣[2] 邓波[2] 李景烨[2] 

机构地区：[1]信阳师范学院化学化工学院,信阳464000 [2]中国科学院上海应用物理研究所,上海201800

出　　处：《辐射研究与辐射工艺学报》2012年第3期148-152,共5页Journal of Radiation Research and Radiation Processing

基　　金：国家自然科学基金(10805070;11175234;11105210)资助

摘　　要：以60Coγ射线为辐射源,对SBS粉体在空气中进行预辐照,然后将一定量粉体置于丙烯酸水溶液体系中进行接枝反应。研究了反应时间、反应温度、单体浓度和吸收剂量对接枝率的影响。傅里叶变换红外光谱(FTIR)分析结果证明了羧酸基团的成功引入,并对接枝后粉体的热重分析,结晶度和表面形貌进行了研究。In this paper acrylic acid was grafted onto SBS powder using pre-irradiation method to produce SBS-g-PAA. The effects of monomer concentration, absorbed dose, reaction time and temperature on degree of grafting were discussed in detail. The FTIR spectra of SBS-g-PAA proved that the polyacrylic acid ha been grafted onto SBS powder successfully. Moreover, the thermogravimetry, X-rays diffraction and the scanning electron microscope were also investigated. Compared with pristine SBS powder, the SBS-g-PAA powder analysis indicated that the ther- mal degradation exhibited a two-step degradation pattern meanwhile the crystallinity declined and the surface became smoother because of the introduction of polyacrylic acid.

关 键 词：SBS(苯乙烯-丁二烯-苯乙烯三嵌段共聚物) 预辐射接枝 粉体 丙烯酸 

分 类 号：O631.31[理学—高分子化学] O631.34[理学—化学]