塑料科技2026，Vol.54Issue(2)：9-15,7.DOI:10.15925/j.cnki.issn1005-3360.2026.02.002
苯乙烯接枝改性对聚丙烯发泡质量的影响
Effect of Styrene Graft Modification on Foam Quality of Polypropylene
摘要
Abstract
The melt strength of polypropylene(PP)had a significant influence on foaming quality,and substantially improving its melt strength through simple methods was of great importance.In the study,styrene(St)was employed as the grafting monomer,and high melt strength polypropylene(HMSPP)was prepared via melt blending.The effects of St monomer on the melt flow rate,rheological properties,crystallization behavior,and foaming quality of PP were investigated.The results indicated that higher grafting degrees of St monomer led to lower melt flow rates of the products.The melt flow rate decreased from 103.6 g/10 min to 83.4 g/10 min upon the addition of St monomer,and the St monomer significantly enhanced the melt strength of PP.Furthermore,the products added St monomer exhibited higher complex viscosity and storage modulus,along with a smaller loss angle.Scanning electron microscopy results revealed that St monomer could markedly improve the foaming quality of PP.HMSPP3,which possessed the highest St monomer grafting degree,maintained excellent cell morphology with high uniformity and high density even at 200℃.The cell density increased from 8.14×106 cells/cm3 to 1.59×107 cells/cm3,while the average cell size decreased from 80 μm to 59 μm.Compared with PP,HMSPP3 with the highest grafting degree demonstrated superior foaming performance.关键词
聚丙烯/苯乙烯/接枝/熔体强度/发泡质量Key words
PP/Styrene/Graft/Melt strength/Foam quality分类
化学化工引用本文复制引用
魏自鹏,幸锦福,朱能贵,蒋团辉,龚维..苯乙烯接枝改性对聚丙烯发泡质量的影响[J].塑料科技,2026,54(2):9-15,7.基金项目
国基后补助项目(黔师新苗[2021]27号) （黔师新苗[2021]27号）
中央引导地方资金项目([2024]036) （[2024]036）
