摘要
利用反应挤出机通过反应挤出微交联的方法制备出高熔体强度聚丙烯(PP)。考察了反应单体用量、过氧化物用量、反应温度以及螺杆转速对产物熔体强度、熔体流动速率和凝胶含量的影响。结果表明,在100.00份PP中加入1.00份的反应单体二乙烯基苯,以0.04份的过氧化二异丙苯作为引发剂,机筒反应段温度为190℃、螺杆转速为40 r/min时,得到产物的熔体强度最佳,比原料PP的提高10倍,产物中有微量的交联,产物的熔融峰温略有提高,仍然可用普通PP相同的成型方法。
High melt strength polypropylene was produced with reactive extrusion mini cross method in special designed reactive extruder. The effect of reactive monomer content, peroxide content, reactive temperature and screw rotation speed of the reactive extruder on melt strength, melt flow rate and gel content of the products was studied carefully. The results showed that the best melt strength of the product could be got at 100.00 phr polypro pylene, 1.00 phr reaction monomer divinylbenzine, 0.04 phr DCP, reactive zone tempera ture of 190 ℃, screw rotation speed of 40 r/min. The melt strength of the best product was 10 times of that of raw material polypropylene. There was mini-cross gel in the product that could be processed in the same model method as common polypropylene.
出处
《现代塑料加工应用》
CAS
北大核心
2006年第2期1-4,共4页
Modern Plastics Processing and Applications
关键词
反应挤出
聚丙烯
改性熔体强度
二乙烯基苯
交联
reactive extrusion
polypropylene
modification
melt strength
divinylbenzine
crosslinking
