| 反应挤出制备的接枝LLDPE流变性 |
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| 引用本文： | 慕晶霞,张娜,李鹏,吴其晔,姚占海,殷敬华. 反应挤出制备的接枝LLDPE流变性[J]. 现代塑料加工应用, 2007, 19(1): 4-7 |
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| 作者姓名： | 慕晶霞 张娜 李鹏 吴其晔 姚占海 殷敬华 |
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| 作者单位： | 1. 青岛科技大学橡塑材料与工程教育部重点实验室,山东,青岛,266042
2. 中科院长春应化所,吉林,长春,130022 |
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| 摘 要： | 采用恒速型双毛细管流变仪定量研究了线型低密度聚乙烯(LLDPE)及其反应挤出接枝料的流变行为,研究了接枝改性对反应接枝料熔体的粘弹性、挤出压力振荡及挤出物外观影响。结果表明,反应接枝使LLDPE的平均相对分子质量增加,粘流活化能增大。高速挤出时,LLDPE的挤出压力出现振荡现象,挤出物表观出现鲨鱼皮畸变;相对而言,反应接枝料的挤出过程更加稳定,挤出物表观得到改善。
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| 关 键 词： | 线型低密度聚乙烯 反应挤出 接枝 粘弹性 |
| 修稿时间： | 2006-07-11 |
Rheology of Graft LLDPE Prepared by Reactive Extrusion |
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| Mu Jingxia,Zhang Na,Li Peng,Wu Qiye,Yao Zhanhai,Yin Jinghua. Rheology of Graft LLDPE Prepared by Reactive Extrusion[J]. Modern Plastics Processing and Applications, 2007, 19(1): 4-7 |
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| Authors: | Mu Jingxia Zhang Na Li Peng Wu Qiye Yao Zhanhai Yin Jinghua |
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| Affiliation: | 1. Key Laboratory of Rubber-Plastics, Ministry of Education, Qingdao University of Science and Technology, Qingdao, Shandong,266042; 2. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun ,Jilin, 130022 |
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| Abstract: | The rheological properties of LLDPE and its graft product prepared by reac- tive extrusion were studied with a double-capillary rheometer RH2000.The effect of graft modification on the viscoelasticity,pressure oscillation and extrusion appearance of the graft LLDPE was studied.The results indicate that the molecular weight and viscosity flow activa- tion energy of the graft LLDPE are higher than those of raw resin.When the extrusion rate is high,the pressure oscillation and the sharkskin distortion of LLDPE occur.But the extru- sion process of the graft one is more stable and its appearance of the extrusion is better. |
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| Keywords: | linear low density polyethylene reactive extrusion graft viscoelasitcity |
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