中国塑料2023，Vol.37Issue(12)：1-6,6.DOI:10.19491/j.issn.1001-9278.2023.12.001
等规聚丁烯-1扩链改性及其超临界CO2发泡行为研究
Chain-extended modification of isotactic polybutene-1 and its supercritical CO2 foaming behavior
摘要
Abstract
Isotactic polybutene-1(iPB-1)with a long-chain branching and cross-linking structure was prepared by using di-cumyl peroxide as an initiator and zinc dimethyldithiocarbamate(ZDMC)and pentaerythritol triacrylate as dual mono-mers.Then,iPB-1 foams were prepared through supercritical CO2 foaming.The effects of chain-extended modification on the melting,crystallization,rheological,and foaming behaviors of iPB-1 were investigated.The results indicated that the long-chain branching structure resulted in an increase in the crystallization temperature of iPB-1 but a decrease in its crystallinity.The modified iPB-1 obtained an improvement in the melt viscoelasticity and relaxation time,resulting in more remarkable shear thinning along with a significant strain-hardening phenomenon.The modified iPB-1 with a long-chain branching structure exhibited a wider foaming temperature window and a more uniform cellular structure.关键词
等规聚丁烯-1/长链支化/流变性能/超临界二氧化碳/发泡Key words
isotactic polybutene-1/long chain branching/rheological property/supercritical carbon dioxide/foaming分类
化学化工引用本文复制引用
宫政,李为杰,赵玲,胡冬冬..等规聚丁烯-1扩链改性及其超临界CO2发泡行为研究[J].中国塑料,2023,37(12):1-6,6.基金项目
上海市自然科学基金面上项目(20ZR1413700) （20ZR1413700）
化学工程联合国家重点实验室开放课题(SKL-ChE-22C02) （SKL-ChE-22C02）
