氟弹性体对双峰型HDPE熔体质量流动速率测试的影响  

EFFECT OF FLUOROCARBON ELASTOMER ON MELT MASS-FLOW RATE OF BIMODAL HDPE

作　　者：张仲明 张强[1] 王力 Zhang Zhongming;Zhang Qiang;Wang Li(Petrochina Sichuan Petrochimical Co., Ltd., Chengdu 611930, Sichuan, China)

机构地区：[1]中国石油四川石化有限责任公司生产监测部,四川成都611930

出　　处：《精细石油化工》2021年第6期35-38,共4页Speciality Petrochemicals

摘　　要：双峰型HDPE树脂常添加氟弹性体用于改善其加工性能,在对其进行熔体质量流动速率(MFR)测试时常会出现测试结果随着测试次数的增加而增大的情况。通过对HDPE树脂粉料添加不同比例的氟弹性体进行造粒,并连续测试其熔体质量流动速率,发现氟弹性体会吸附、聚集在熔融指数仪口模内表面形成一种微观的润滑膜,从而导致随着测试次数的增加,熔体质量流动速率不断增大,且氟弹性体含量越大,这种效应越明显。使用未添加任何润滑剂的HDPE可以清洗在口模内表面积累的氟弹性体,确保测试准确。Bimodal HDPE resin is often added with Fluorine elastomer to improve its processing properties,and the results of MFR tests often increase with the number of tests.By adding different proportions of Fluorine elastomer to the HDPE resin powder,and continuous testing the MFR,found that the Fluorine elastomer adsorption and gathered in the mouth model inner surface of the fusion index instrument,would form a kind of micro lubrication membrane,resulting in increased with the increase of test times,the MFR increasing,the higher the Fluorine elastomer content is,the more obvious the effect is.The use of the HDPE without adding any lubricant can clear the machine surface’s accumulation of the Fluorine elastomer,and can also ensure the test’s accuracy.

关 键 词：熔体质量流动速率 氟弹性体 润滑膜 双峰 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业]