硅胶接枝1,3-2,4-二(对甲基亚苄基)山梨醇成核剂的制备  

Preparation of nucleating agents of SiO_2-grafted 1,3-2,4-bis (p-methyl benzylidene) sorbitol

作　　者：杨雪芹[1] 葛志华[1] 韩捷 史建公 Yang Xueqin;Ge Zhihua;Han Jie;Shi Jiangong(Cangzhou Technical College,Cangzhou 061001,China;Engineering Technology Research Institute,SINOPEC Catalyst Beijing Co.,Ltd.,Beijing 101111,China)

机构地区：[1]沧州职业技术学院,河北省沧州市061001 [2]中国石化催化剂有限公司工程技术研究院,北京市101111

出　　处：《合成树脂及塑料》2019年第1期38-42,共5页China Synthetic Resin and Plastics

摘　　要：以山梨醇与对甲基苯甲醛为原料,对甲基苯磺酸为催化剂,硅酸四乙酯为硅源,原位合成了硅胶接枝1,3-2,4-二(对甲基亚苄基)山梨醇成核剂,表征了成核剂的结构,并用于聚丙烯改性。结果表明:硅胶与1,3-2,4-二(对甲基亚苄基)山梨醇发生了化学接枝;硅胶接枝成核剂的熔程较宽;硅胶接枝成核剂对聚丙烯不仅具有良好的增透作用,而且具有明显的增刚作用,改性聚丙烯的弯曲模量最高可增加23%。SiO2-grafted 1,3-2,4-bis(p-methyl benzylidene)sorbitol nucleating agents were synthesized in situ with sorbitol and p-methyl benzaldehyde as raw materials,p-tolunensulfonate as catalyst,and tetraethyl silicate as silicon source.The structures of nucleating agents that were used for polypropylene modification were characterized.The results show that SiO2 is grafted to 1,3-2,4-bis(p-methyl benzylidene)sorbitol.The melting point range of SiO2-grafted nucleating agents is wider.This SiO2-grated nucleating agent not only improves the transparency of polypropylene,but also enhances the rigidity of polypropylene.The bending modulus of modified polypropylene is increased by 23%.

关 键 词：成核剂 硅胶接枝 聚丙烯 山梨醇缩醛 山梨醇 对甲基苯甲醛 

分 类 号：TQ314.24[化学工程—高聚物工业] O631.1[理学—高分子化学]