| 高熔体强度聚丙烯/低密度聚乙烯共混体系的挤出发泡行为研究 |
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| 引用本文： | 刘伟,王向东. 高熔体强度聚丙烯/低密度聚乙烯共混体系的挤出发泡行为研究[J]. 工程塑料应用, 2011, 39(10): 78-83 |
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| 作者姓名： | 刘伟 王向东 |
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| 作者单位： | 北京工商大学材料与机械工程学院,北京,100048 |
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| 基金项目： | 科技部科研院所技术开发研究专项资金项目 |
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| 摘 要： | 利用熔体流动速率测试仪和转矩流变仪对不同比例的高熔体强度聚丙烯(HMSPP)/低密度聚乙烯(PELD)共混体系的流变行为进行研究,并对共混体系的流变数据进行分析.随后采用超临界CO2作为发泡剂进行了HMSPP/PE-LD共混体系的挤出发泡研究,并通过真密度计和扫描电子显微镜表征了发泡材料的表观密度和泡体结构参数.结果表...
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| 关 键 词： | 高熔体强度聚丙烯 低密度聚乙烯 共混体系 挤出发泡 流变行为 泡孔密度 |
STUDY ON HIGH MELT STRENGTH POLYPROPYLENE/LOW DENSITY POLYETHYLENE BLENDS EXTRUSION FOAMING BEHAVIOR |
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| Liu Wei,Wang Xiangdong. STUDY ON HIGH MELT STRENGTH POLYPROPYLENE/LOW DENSITY POLYETHYLENE BLENDS EXTRUSION FOAMING BEHAVIOR[J]. Engineering Plastics Application, 2011, 39(10): 78-83 |
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| Authors: | Liu Wei Wang Xiangdong |
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| Affiliation: | (School of Materials and Mechanical Engineering,Beijing Technology and Business University,Beijing 100048,China) |
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| Abstract: | High melt strength polypropylene was blended with low density polyethylene,and the rheology behavior was studied by melt flow rate instrument/torque rheometer,and rheological data was analysed.Then the blends were extrusion foamed with supercritical CO2 as vesicant,foam density and morphology of HMSPP/PE-LD blends were tested by using densimeter and SEM.The result showed that melt elastic of HMSPP was better than that of PE-LD.However,melt elastic of blends were slightly affected when PE-LD content was lower than 50%,blends possessed excellent foamability.Adding PE-LD within certain content to blends would increase cell density of blends.When PE-LD exceed certain content,foaming rate and cell density of foam samples would greatly decrease. |
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| Keywords: | high melt strength polypropylene low density polyethylene blend extrusion foaming rheology behavior cell density |
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