摘要
为验证ASTM D4020–2011和GB/T 1632.3–2010是否适合测定我国常用超高分子量聚乙烯(PE-UHMW)的黏均分子量以及探讨奥氏黏度计能否代替乌氏黏度计测定PE-UHMW的黏均分子量,研究了黏度法测定PE-UHMW分子量的影响因素,包括黏度计与毛细管内径的选择、溶液浓度与溶剂的选择、抗氧剂的作用、实验温度的控制以及数据处理方法等。实验结果表明,十氢萘是配制PE-UHMW溶液的较佳溶剂,PE-UHMW溶液的浓度与毛细管流出时间分别控制在0.008～0.050 g/(100 mL)与80.0～140.0 s较为合适,加抗氧剂能有效防止PE-UHMW的氧化降解,选用毛细管内径为0.55 mm的奥氏黏度计可满足使用要求。
In order to verify whether ASTM D4020-2011 and GB / T 1632.3-2010 are suitable for determination of the viscosity average molecular weight of ultra high molecular weight polyethylene （PE-UHMW） commonly used at home and investigate whether Ubbelohde viscometer can be replaced with Ostwald viscometer to determine the viscosity average molecular weight of PE-UHMW, the influencing factors of determining the viscosity average molecular weight of PE-UHMW were studied, including the selection of viscometer and the capillary diameter, the selection of the solvent and the concentration of PE-UHMW solution, the antioxidant effect, the measurement temperature control and data processing method. The results indicate that decahydronaphthalene is the better solvent for preparation of PE-UHMW solution, the concentration of PE-UHMW solution and the flow time through capillary should be controlled in 0.008 - 0.050 g/（100 mL） and 80.0 - 140.0 s respectively, adding antioxidant is helpful to avoid the oxidative degradation of PE-UHMW. Furthermore, the Ostwald viscometer with the capillary diameter being 0.55 mm can satisfy the determination requirements of viscosity average molecular weight of PE-UHMW by viscometry.
出处
《工程塑料应用》
CAS
CSCD
北大核心
2013年第2期66-69,共4页
Engineering Plastics Application
基金
重庆理工大学实验创新基金项目(SC201227)
关键词
黏度法
超高分子量聚乙烯
黏均分子量
测定
viscometry
ultra high molecular weight polyethylene
viscosity average molecular weight
determination
作者简介
联系人：周冕，副教授，主要研究方向为高分子材料加工流变学、结构与性能表征
