改性炭黑与有机紫外吸收剂复配对SBS紫外吸收性能的影响

Effect of Modified Carbon Black and Organic UV Absorber on the UV-Absorption Behavior of SBS Composites

摘要: 将炭黑经过氧化和羟甲基化反应得到改性炭黑（MCB），以苯乙烯-丁二烯-苯乙烯嵌段共聚物（SBS）为基体，用溶剂浇铸法制备了MCB-有机紫外吸收剂（UA）-SBS复合物，研究了复合物的紫外吸收性能以及MCB与UA之间的协同作用。结果表明：纯SBS膜的紫外吸收区域只有200~300 nm，而同时加入MCB与UA的SBS复合物，其紫外吸收区域发生了红移。产生红移的原因是MCB与UA之间形成了氢键从而导致协同效应，利用傅里叶变换红外光谱仪（FT-IR）和差示扫描量热仪（DSC）证实了氢键的存在。此外，当加入UA质

Abstract: Modified carbon black (MCB) was obtained by the oxidization and hydroxymethylation reaction.The styrene-butadiene-styrene copolymer(SBS) composites were prepared by solvent casting, and the UV absorption behavior of SBS composites with MCB and organic UV absorber A (UA) was studied. Synergism between MCB and UA in the composites was explored. UV-absorption range of the composites shifted toward red light direction after UA and MCB were both added. This is attributed to the formation of hydrogen bond between UA and MCB, which was confirmed by FTIR and DSC. Finally, the optimized composition of the composite with perfect UV-absorption was determined, about 30 nm red shift occurred when 0.2% MCB and 2% UA were doped in the SBS composites.