Mechanical, Rheological, and Heat Seal Properties of 1-Octene Grafted Low Density Polyethylene Films

IF 1.8 4区工程技术 Q3 ENGINEERING, CHEMICAL

Macromolecular Reaction Engineering Pub Date : 2023-12-26 DOI:10.1002/mren.202300060

Fatemeh Salmani, Rasoul Shemshadi, Issa Mousazadeh Moghaddampour, Shervin Ahmadi, Ghasem Naderi, Razi Sahraeian, Seyed Mohamad Reza Paran

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Abstract

Heat seal and mechanical properties of 1-octene grafted low density polyethylene films containing various concentrations of Dicumyl peroxide as the initiator and 1-octene grafting agent is investigated through using experimental measurements. The results of differential scanning calorimeter (DSC) measurements revealed that the melting temperature shifts to higher values and the peak of the DSC curve becomes wider with the increase of 1-octene concentrations. Thermogravimetric analysis (TGA) revealed a higher thermal stability up to 20 °C for 1-octene grafted PE compared with neat LDPE alloy. The results of stress–strain measurements revealed that the 1-octene grafted PE alloys has higher tensile strength in comparison with neat PE alloy and samples containing only DCP initiator. The results of heat seal analysis indicated that both DCP initiator and 1-octene tended to offer a moderate increase peel strength of PE alloy. DMTA measurements for various grafted PE alloys show a higher damping factor in comparison with neat LDPE alloy. Rheological measurements indicated a higher storage modulus up to 25% and higher complex viscosity for grafted PE samples containing 1-octene comonomer.

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1 辛烯接枝低密度聚乙烯薄膜的机械、流变和热封性能

通过实验测量研究了以不同浓度的过氧化二异丙苯为引发剂和 1-辛烯接枝剂的 1-辛烯接枝低密度聚乙烯（LDPE）薄膜的热封和机械性能。1- 辛烯接枝低密度聚乙烯薄膜的衰减全反射傅立叶变换红外光谱（ATR-FTIR）表明接枝过程已经完成。差示扫描量热仪（DSC）测量结果表明，随着 1-辛烯浓度的增加，熔化温度升高，DSC 曲线的峰值变宽。热重分析（TGA）显示，与含有低密度聚乙烯（LDPE）和线性低密度聚乙烯（LLDPE）的纯聚乙烯合金相比，1-辛烯接枝聚乙烯在 20°C 以下具有更高的热稳定性。应力-应变测量结果表明，1-辛烯接枝聚乙烯合金与纯聚乙烯合金和仅含二氯丙烯基引发剂的样品相比，具有更高的拉伸强度。热封分析结果表明，DCP 引发剂和 1-辛烯都能适度提高聚乙烯合金的剥离强度。各种接枝聚乙烯合金的动态机械热分析（DMTA）测量结果表明，与纯低密度聚乙烯合金相比，其阻尼系数更高。流变学测量结果表明，含有 1-辛烯单体的接枝聚乙烯样品的储存模量最高可提高 25%，复合粘度也更高。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Macromolecular Reaction Engineering 工程技术-高分子科学

CiteScore

2.60

自引率

20.00%

发文量

审稿时长

3 months

期刊介绍： Macromolecular Reaction Engineering is the established high-quality journal dedicated exclusively to academic and industrial research in the field of polymer reaction engineering.