期刊文献+

分子结构对双峰管材专用树脂流变性能的影响 被引量:3

Influence of Molecular Structure on Rheological Properties of Bimodal Pipe Special Resins
下载PDF
导出
摘要 对3种双峰聚乙烯管材专用树脂进行了结构性能及毛细管流变行为、拉伸流变行为的研究。结果表明:双峰管材专用树脂熔体流动速率低(0.23~0.25 g/10 min),结晶性能好(熔点128℃以上,结晶温度115℃以上,结晶度大于65%),相对分子质量分布宽。不同管材专用树脂的结构差异决定了其流变加工性能。少量低相对分子质量尾端组分对挤出流变行为的影响显著,可以降低低剪切速率下的黏度和压力。提高高相对分子质量组分所占比例,比增大高相对分子质量组分的相对分子质量大小对提高熔体强度的效果更明显。 The structural properties,capillary rheological behavior and extensional rheological behavior of three kinds of bimodal pipe resins were studied.The results show that the bimodal pipe resins have low melt flow rate(0.23~0.25 g/10 min),good crystallization performance(melting point above 128℃,crystallization temperature above 115℃,crystallinity above 65%),broad molecular weight distribution.The structural differences of different pipe resins determine their rheological properties.A small number of low molecular weight tail components have a significant effect on extrusion rheological behavior and can reduce viscosity and pressure at low shear rates.It is more effective to increase the proportion than to increase the molecular weight of high molecular weight components to increase the melt strength.
作者 李朋朋 李国新 马国平 伍剑 Li Pengpeng;Li Guoxin;Ma Guoping;Wu Jian(Lanzhou Petrochemical Research Center,PetroChina,Lanzhou,Gansu,730060;Petrochemical Plant of Lanzhou Petrochemical Company,PetroChina,Lanzhou,Gansu,730060;Southwest Chemicals Marketing Company,PetroChina,Chongqing,401333)
出处 《现代塑料加工应用》 CAS 北大核心 2019年第4期39-42,共4页 Modern Plastics Processing and Applications
关键词 双峰聚乙烯 结构与性能 毛细管流变 拉伸流变 bimodal polyethylene structure and property capillary rheology extensional rheology
  • 相关文献

参考文献4

二级参考文献26

  • 1唐岩,王群涛,石志俭,谢建玲,戚思清,毕丽景.PE100级管材专用树脂的开发[J].合成树脂及塑料,2005,22(5):5-8. 被引量:15
  • 2KRISHNASWAMY R K. Analysis of ductile and brittle failures from creep rupture testing of high-density polyethylene (HDPE) pipes[J]. Polymer, 2005, 46(25): 11664-11672.
  • 3HUBERT L, DAVID L, SEGUELA R, et al. Physical and mechanical properties of polyethylene for pipes in relation to molecular architecture I. Microstructure and erystallisation kinetics [ J ]. Polymer, 2001, 42(20) : 8425-8434.
  • 4PLUMMEr C J G, GOLDBERG A, GHANEM A. Micromech- anisms of slow crack growth in polyethylene under constant tensile loading[J]. Polymer, 2001, 42(23): 9551-9564.
  • 5RITCHI S J K, DAVIS P, LEEVERS P S. Brittle-tough transition of rapid crack propagation in polyethylene[J]. Polymer, 1998, 39 (25) : 6657-6663.
  • 6FAYOLLE B, VERDU J. EWF method to study long term fracture properties of cross-linked polyethylene[J]. Polymer Engineering and Science, 2005, 45(3): 424-431.
  • 7陈南勋.理论分析测试指南[M].北京:国防工业出版社,1988:627.
  • 8BENAVENTE R, P EREZ E, YAZDANI-PEDRAM M, et al. Viscoelastic relaxations in poly(ethylene-co-1 -octadecene) synthesized by a metallocene catalyst[J]. Polymer, 2002, 43(25) : 6821-6828.
  • 9[2]Darras O, Seguela R. Polymer, 1993, 34: 2946~2950.
  • 10[3]Hoffman J D. Polymer, 1997,38 (13): 3151~3212.

共引文献29

同被引文献21

引证文献3

二级引证文献5

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部