Proceedings of the KSME Conference (대한기계학회:학술대회논문집)
- 2003.11a
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- Pages.1828-1833
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- 2003
The Foaming Characteristics of Microcellular Processing with Polypropylene in Semicrystalline States
결정성 수지의 발포특성
- Published : 2003.11.05
Abstract
In a foaming process of microcellular plastics (MCPs) with a batch process, amorphous plastics and crystalline plastics have different characteristics for a foaming temperature. It is known that a foaming of amorphous plastics occurs at the temperature above a glass transition temperature, however, it is discovered that crystalline plastics do not take place above a glass transition temperature without exception, and even though the foaming occurs, it does not in all the range. In this research, to measure foaming temperature of crystalline polymer, a foaming experiment was performed using one of the typical crystalline polymer, polypropylene. To analyze whether the foaming occurs both at amorphous and crystalline fields, SEM was applied