不同辛烯含量的POE对PPR结晶动力学和性能的影响
Effect of POE with Different Octene Content on Crystallization Kinetics and Properties of PPR
周芷伊 1邵文君 2史颖 3李先亮 1宋立新1
作者信息
- 1. 沈阳化工大学高分子产业高端制造研究院,辽宁 沈阳 110142
- 2. 沈阳化工大学高分子产业高端制造研究院,辽宁 沈阳 110142;沈阳工业大学材料科学与工程学院,辽宁 沈阳 110870
- 3. 沈阳化工大学高分子产业高端制造研究院,辽宁 沈阳 110142;东莞海丽控股集团有限公司,广东 东莞 523106
- 折叠
摘要
乙烯-辛烯共聚物(POE)可以增韧无规共聚聚丙烯(PPR),但是POE种类和辛烯含量对PPR增韧效果具有明显影响.文章以3种不同辛烯含量的POE与PPR共混,通过PPR/POE共混物的DSC非等温结晶动力学分析揭示PPR和POE中的乙烯链段会形成共晶结构,导致结晶温度升高.通过熔体流动速率可知,辛烯含量高的POE会增大PPR/POE共混物的结晶温度,原因可能是高辛烯含量的POE流动性强,更容易分散在PPR/POE共混物中,因此对PPR起到更好的增韧效果.力学性能测试进一步证实了加入POE会使PPR强度略有降低,其中辛烯含量低的POE对强度影响较小.因此,在实际应用中需要综合考虑PPR在领域的应用,从而选择合适的POE.
Abstract
Ethylene-octene copolymer(POE)can toughen polypropylene random(PPR).However,the type of POE and the octene concentration have a significant impact on the toughening effect of PPR.In this paper,three types of POE with different octene concentrations were blended with PPR.Through non-isothermal crystallization kinetics DSC analysis of PPR/POE blends,it was revealed that the ethylene segments in PPR and POE form a eutectic structure,leading to an increase in crystallization temperature.It can be inferred from the melt flow rate that POE with a high concentration of octene will increase the crystallization temperature of the PPR/POE blend.The reason may be that POE with a high octene concentration has strong fluidity and is more easily dispersed in the PPR/POE blend,thereby providing a better toughening effect on PPR.The mechanical property tests further confirm that the addition of POE can slightly reduce the strength of PPR,with POE containing lower octene concentration having a smaller impact on strength.Therefore,in practical applications,it is necessary to comprehensively consider the application of PPR in different directions and choose the appropriate POE.
关键词
无规共聚聚丙烯/乙烯-辛烯共聚物/共混体系/增韧Key words
Polypropylene random/Ethylene-octene copolymer/Blending system/Toughening引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据