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http://dx.doi.org/10.7317/pk.2015.39.1.64

Physical Properties of Polypropylene Foam Blended with Thermally Expandable Microcapsules  

Ha, Jin Uk (Lightweight & Convergent Materials R&D Center, Korea Automotive Technology Institute)
Jeoung, Sun Kyung (Lightweight & Convergent Materials R&D Center, Korea Automotive Technology Institute)
Lee, Pyoung-Chan (Lightweight & Convergent Materials R&D Center, Korea Automotive Technology Institute)
Hwang, Ye Jin (Lightweight & Convergent Materials R&D Center, Korea Automotive Technology Institute)
Nam, Byung Kook (The 3rd Research Team, Lotte Chemical)
Han, In-Soo (Polymeric Materials Research Team, Hyundai Motors)
Kwak, Sung Bok (Advanced Engineering Team, Duckyang Ind. Co., Ltd.)
Lee, Jae Yong (Advanced Engineering Team, Duckyang Ind. Co., Ltd.)
Publication Information
Polymer(Korea) / v.39, no.1, 2015 , pp. 64-70 More about this Journal
Abstract
Thermally expandable microcapsules (TEMs) can be expanded upon heating since the activation energy of liquid hydrocarbon at the core of the TEMs increased at high temperature. Due to this property, TEMs are widely used in the industry as blowing agents or light-weight fillers. In this article, chemical blowing agent and TEM were used for making polypropylene (PP) foams, and their mechanical properties were compared. Physical properties (tensile strength, impact strength etc.) of PP foams decreased with increasing the amount of blowing agents while weight of specimen decreased. However, PP foam produced with TEMs showed higher impact strength than the one with a chemical blowing agent. In order to figure out the difference of impact strength, the morphology of PP foamed was investigated. Expanding properties of TEM can be controlled by changing core back distance.
Keywords
polypropylene; thermally expandable microcapsule; foaming; chemical blowing agent; mechanical properties; core back;
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Times Cited By KSCI : 3  (Citation Analysis)
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