ACR抗冲击改性剂的合成及其在聚乳酸改性中的应用研究

Synthesis of ACR Impact Modifier and Its Application in Poly(lactic acid)

通过对粒子形态及结构设计,合成了以适度交联的聚有机硅橡胶和丙烯酸丁酯共聚物的复合橡胶相为核,以甲基丙烯酸甲酯和甲基丙烯酸缩水甘油酯共聚物为壳,具有核/壳结构的丙烯酸酯类共聚物(ACR)抗冲击改性剂。用红外光谱和透射电子显微镜对其组成和结构进行了表征,并对其在聚乳酸(PLA)中的应用进行了研究。结果表明,当ACR的平均粒径为280 nm时,添加10%的ACR,PLA/ACR共混物的缺口冲击强度可达39.6 kJ/m^2,雾度小于20%,熔融塑化时间降低9 min,平衡扭矩提高3.3 N·m,最大扭矩提高2 N·m。

An impact modifier was synthesized with a mixture of moderately crosslinked poly silicone rubber and butylacrylate copolymer as the core and methyl methacrylate and glycidyl methacrylate copolymer as the shell.The composition and structure were characterized with infrared spectroscopy and transmission electron microscope.The impact modifier was applied in the poly(actic acid)(PLA) with a loading of 10%and an average particle size of 280 nm.The notched impact strength of PLA reached 39.6 kJ/m^2,the haze was below 20%,melting time was reduced by 9 min,the balance torque increased by 3.3 N·m,and maximum torque increased by 2 N·m.