羟基官能化ACR的制备及其在PBT改性中的应用研究  

Preparation of hydroxyl functionalized ACR and its application in PBT modification

作　　者：马建心 王国梁 杜中杰 王武聪 金华 邹威 王洪 张晨[1] MA Jianxin;WANG Guoliang;DU Zhongjie;WANG Wucong;JIN Hua;ZOU Wei;WANG Hong;ZHANG Chen(College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China;Sinochem Petrochemical Distribution Co,Ltd,Shanghai 200051,China)

机构地区：[1]北京化工大学材料科学与工程学院,北京100029 [2]中化石化销售有限公司,上海200051

出　　处：《中国塑料》2024年第9期14-19,共6页China Plastics

摘　　要：采用种子乳液法合成了以微交联聚丙烯酸丁酯(PBA)为橡胶核层,聚甲基丙烯酸甲酯(PMMA)和功能单体丙烯酸羟乙酯(HEA)为壳层的羟基官能化聚丙烯酸酯橡胶粒子(ACR-OH)。将ACR-OH与异氰尿酸三缩水甘油酯(TGIC)混合后加入聚对苯二甲酸丁二酯(PBT),利用在熔融共混过程中ACR粒子表面羟基与TGIC中环氧基团的反应以及TGIC与PBT端羟基反应的协同作用,得到ACR与PBT具有良好相容性的改性PBT树脂(PBT/TGIC/ACR-OH)。考察了ACR-OH和TGIC添加量对PBT的冲击强度和拉伸强度的影响。结果表明,由于良好的相容性,羟基官能化ACR的加入可以有效改善PBT的韧性。以100份PBT树脂为基准,当ACR-OH和TGIC的添加量分别为20份和2份时,共混物的冲击强度达到20.45 kJ/m2,是纯PBT(2.43 kJ/m2)的8.4倍;同时,在多官能度TGIC的辅助作用下,当ACR-OH和TGIC的添加量分别为8份和2份时,改性PBT表现出较好的刚韧平衡,其冲击强度、拉伸强度分别为10.87 kJ/m2和42.1 MPa。Hydroxy-functionalized polyacrylate rubber particles(ACR-OH)were synthesized with micro-crosslinked poly-butyl acrylate(PBA)as a rubber core and methyl methacrylate-hydroxyethyl acrylate copolymer(HEA)as a shell through seed emulsion polymerization.ACR-OH was mixed with triglycidyl isocyanurate(TGIC)and then added into polybutylene terylene phthalate(PBT).Owing to the reactions occurring between the hydroxyl groups on the surface of ACR particles and epoxy groups in TGIC and between the epoxy groups in TGIC and hydroxyl end-group of PBT in the melt blending process,the modified PBT(PBT/TGIC/ACR-OH)gained the good compatibility between ACR and PBT.The effect of the addition of ACR-OH and TGIC on the impact strength and tensile strength of the modified PBT were investigated.The results indicated that the addition of ACR-OH effectively improved the toughness of PBT due to good compatibility.When the addition amounts of ACR-OH and TGIC were 20 and 2 phr,respectively,the impact strength of the modified PBT reached 20.45 kJ/m2,which was 8.4 times as high as that of pure PBT(2.43 kJ/m2).Moreover,with the help of multi-functional TGIC,the modified PBT exhibited both good toughness and good strength at addition amounts of ACR-OH and TGIC of 8 and 2 phr,respectively.Its impact strength and tensile strength reached 10.87 kJ/m2 and 42.1 MPa,respectively.

关 键 词：乳液聚合 羟基官能化聚丙烯酸酯橡胶粒子 聚对苯二甲酸丁二酯 相容性 冲击强度 拉伸强度 

分 类 号：TQ323.41[化学工程—合成树脂塑料工业]