The Relationship between Bulk Property and Property Distribution in Thin-Wall Injection Molded PP at Different Molecular Weight and Molecular Weight Distribution
The Relationship between Bulk Property and Property Distribution in Thin-Wall Injection Molded PP at Different Molecular Weight and Molecular Weight Distribution作者机构：Department of Advanced Fibro Science Kyoto Institute of Technology Kyoto Japan Osaka Municipal Technical Research Institute Osaka Japan Center for Fiber and Textile Science Kyoto Institute of Technology Kyoto Japan Kaneka US Material Research Center Kaneka Americas Holding Inc. TX USA
出 版 物：《Advances in Materials Physics and Chemistry》 (材料物理与化学进展（英文）)
年 卷 期：2016年第6卷第1期
页 面：1-8页
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
主 题：Molecular Weight Molecular Weight Distribution Fracture Toughness Property Distribution Thin-Wall Injection Molding
摘 要：Thin-wall injection molded parts have been paid much attention to the lightweight saving from viewpoints of natural resources saving. In the injection molding, skin-core structure can be found in the parts. This skin-core structure affects the property of completed injection molding parts (bulk property) even if in thin-wall injection molding. However, there is a few research about the relationship between bulk property and internal property distribution in the injection molding specimen. In this study, thin-wall injection molded parts of polypropylene (PP) were prepared by 4 different molecular weight and molecular weight distribution to reveal the relationship between bulk property and property distribution. These characteristics were investigated by using tensile test, fracture toughness characterized by Essential Work of Fracture (EWF) method for bulk property and film tensile test by sliced sample for tensile property distribution. The property distribution test results revealed that the highly bulk property sample had thicker highly mechanical property layer on its surface.
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