热降解法制备喷丝级高熔指聚丙烯及其流变性能研究  

Preparation and Properties of Melt-blown Polypropylene Manufactured by Thermal Degradation

作　　者：彭威 江太君[2,3] PENG Wei;JIANG Taijun(Zhuhai Dynamic Technology Optical Industry Co.,Ltd.,Zhuhai 519050,China;Hunan University of Technology,Zhuzhou 412007,China;Dongguan Mingfeng Packaging Co.,Ltd.,Dongguan 523049,China)

机构地区：[1]珠海市能动科技光学产业有限公司,广东珠海519050 [2]湖南工业大学,湖南株洲421007 [3]东莞铭丰包装股份有限公司,广东东莞523049

出　　处：《化工技术与开发》2020年第11期15-17,共3页Technology & Development of Chemical Industry

摘　　要：以均聚聚丙烯为原料,DTBP为引发剂,抗氧剂为稳定剂,通过平行双螺杆挤出机混炼挤出,制备了喷丝级高熔指改性聚丙烯,评估了引发剂、抗氧剂用量、挤出温度对熔融指数的影响。结果表明:1)引发剂对聚丙烯的降解作用,随着DTBP含量的增加呈线性增加;2)抗氧剂可有效抑制引发剂的作用,起到稳定熔质的效果;3)挤出温度对引发剂的促进作用明显;4)在较低产量下,聚丙烯颗粒的下线含水率较低且稳定,随着挤出速度增加,含水率迅速增加。The melt-blown grade polypropylene was prepared by melt blending homo-polypropylene with DTBP and anti-oxidant in a twin screw extruder.The variation of melt flow index as a function of the concentration of initiator DTBP,anti-oxidant and screw temperature were investigated.The experimental results showed that:1)the thermal degradation of polypropylene increased linearly with the increase of DTBP concentration;2)the anti-oxidant could inhabit the degradation of polypropylene initiated by DTBP and stabilized the melt flow index of the melt-blown polypropylene;3)screw temperature could promote the degradation of polypropylene;4)the moisture content of the pellets stabilized at lower production capacity and increased dramatically at higher production capacity.

关 键 词：聚丙烯 引发剂 热降解 熔融指数 熔喷 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]