Superior low-temperature mechanical toughness of the PP-based blown micro/nano layer films

编号 020036601

推送时间 20221024

研究领域 林产化工 

年份 2022 

类型 期刊 

语种 英语

标题 Superior low-temperature mechanical toughness of the PP-based blown micro/nano layer films

来源期刊 Polymer

期 第366期

发表时间 20220826

关键词 Micro;  nano layer films;  Low -temperature toughening;  Polypropylene;  Nanolayer blown molding; 

摘要 The poor low-temperature mechanical properties of polypropylene (PP) film strongly restrict its applications in low-temperature service conditions like frozen packaging, or cold countries and regions. Here the PP-based films including 8-, 128-and 512-layer, were successfully produced by the self-developed nanolayered blown film technology. The 128-layer film exhibited exceptionally enhancement in the low-temperature mechanical prop-erties, outperforming the commercialized 2-layer film with increments of 389%, 141%, and 126% in tensile impact strength, elongation at break, and tear strength, respectively. The DSC, WAXD, and SAXS results disclosed that the crystalline structure of PP in different micro/nano layer films was nearly identical. So, the ultrathin micro/nano layer structure should be responsible for the robust low-temperature mechanical properties, which dissipated energy during the mechanical break by promoting the large plastic deformation. Briefly, the PP-based micro/nano layer films fabricated by the self-developed nanolayer blown film technology show robust low -temperature mechanical properties, so this work may attract some attention in the polymer film industry.

服务人员 尚玮姣

服务院士 宋湛谦

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