文献类型：期刊文献

英文题名：Effects of the blending time on the properties and non-isothermal crystallization behavior of PA6/EVOH blends

作者：Lu, Weixin[1];Lu, Chong[1];Hu, Jing[1];Wu, Jingjing[1];Zhou, Qinpeng[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2021

卷号：61

期号：6

起止页码：1719

外文期刊名：POLYMER ENGINEERING AND SCIENCE

收录：;EI(收录号：20211410167757);WOS:【SCI-EXPANDED(收录号:WOS:000636331000001)】；

语种：英文

外文关键词：blending time; ethylene vinyl alcohol copolymer; non-isothermal crystallization behavior; polyamide 6; properties

摘要：Both polyamide 6 (PA6) and ethylene vinyl alcohol copolymer (EVOH) have high fractional crystallinity. Non-isothermal crystallization kinetics is highly important for the design of processing operations. Furthermore, PA6 and EVOH undergo a chemical reaction to form copolymer when melt blended for a sufficiently long time. Therefore, the effects of the blending time on the mechanical properties, rheological properties, and non-isothermal crystallization kinetics of PA6/EVOH blends were investigated. Non-isothermal crystallization kinetics were analyzed through the Jeziorny and Mo's equations, and the Mo's equation more appropriately described the crystallization behavior of the blends. Mechanical properties, melt viscosity, and storage modulus gradually enhanced with an increase in the blending time, and the elongation at break first increased and then decreased with an increase in the blending time because when the blending time increased, the degree of the reaction between PA6 and EVOH increased, causing adhesion at interfaces and intermolecular interaction to enhance and causing a decrease in molecular chain fluidity. The former leads to an increase in the mechanical properties of the blend, and the latter renders the regular arrangement of chains for crystallization highly difficulty; hence, crystallization fractions in the blend gradually decrease.