利用凝胶渗透色谱(GPC)、差示扫描量热法(DSC)、J积分法和动态力学分析(DMA)等研究了聚乙烯管材专用料的分子量分布和共聚单体对其结晶行为、断裂韧性和耐蠕变性能的影响.结果表明,相对于单峰分子量分布的共聚聚乙烯而言,双峰分子量分布的均聚聚乙烯结晶度从54.5%增加到60.9%,断裂韧性从5.85 kJ/m2提高到6.67 kJ/m2.此外,拉伸性能和耐蠕变性能也得到提高.
参考文献
| [1] | Rajendra K.Krishnaswamy .Analysis of ductile and brittle failures from creep rupture testing of high-density polyethylene (HDPE) pipes[J].Polymer: The International Journal for the Science and Technology of Polymers,2005(25):11664-11672. |
| [2] | L.Hubert;L.David;R.Seguela;G.Vigier;C.Degoulet;Y.Germain .Physical and mechanical properties of polyethylene for pipes in relation to molecular architecture. I. Microstructure and crystallisation kinetics[J].Polymer: The International Journal for the Science and Technology of Polymers,2001(20):8425-8434. |
| [3] | Christopher J.G. Plummer;Anne Goldberg;Antoine Ghanem .Micromechanisms of slow crack growth in polyethylene under constant tensile loading[J].Polymer: The International Journal for the Science and Technology of Polymers,2001(23):9551-9564. |
| [4] | Ritchie SJK.;Leevers PS.;Davis P. .Brittle-tough transition of rapid crack propagation in polyethylene[J].Polymer: The International Journal for the Science and Technology of Polymers,1998(25):6657-6663. |
| [5] | B.Fayolle;J.Verdu .EWF Method to Study Long Term Fracture Properties of Cross-linked Polyethylene[J].Polymer engineering and science,2005(3):424-431. |
| [6] | Benavente R.;Perez E.;Yazdani-Pedram M.;Quijada R. .Viscoelastic relaxations in poly(ethylene-co-1-octadecene) synthesized by a metallocene catalyst[J].Polymer: The International Journal for the Science and Technology of Polymers,2002(25):6821-6828. |
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