- Volume 51 Issue 1
DOI QR Code
The Investigation of Rheological Properties Development for Polymer Matrix Including Foaming Agent
- Lee, Seung Hak (School of Chemical and Biomolecular Engineering, Pusan National University) ;
- Kim, Dong Gun (Korea Institute of Footwear & Leather Technology) ;
- Lim, Sung Wook (Korea Institute of Footwear & Leather Technology) ;
- Park, Eun Young (Korea Institute of Footwear & Leather Technology) ;
- Park, Tae Sun (Korea Institute of Footwear & Leather Technology) ;
- Hyun, Kyu (School of Chemical and Biomolecular Engineering, Pusan National University)
- Received : 2015.11.13
- Accepted : 2016.01.06
- Published : 2016.03.31
Sole in the footwear usually modified with foaming agent on the polymer resin to improve the lightweightness and crush-cushion effect. In this study, we investigated rheological properties for polymer resin filled with the different type and concentration of foaming agent, capsule type foaming agent and organo-chemical foaming agent, under the time sweep test. Curing times of each polymer resin with different kind of foaming agent are delayed than reference material (epoxy resin with curing agent). In case of adding capsule type foaming agent, however, there is appropriate concentration to reduce the curing time, relatively. When foaming agent is activated, foaming force inflates the sample in contrast to condensation force of curing and then axial normal force develop to the (+) direction. Interestingly, by increase concentration of foaming agent, there is a specific point to break down the axial normal force development. The reason for this phenomenon is that coalescence of foams induce the blocking of axial normal force development.
Supported by : 산업통상자원부
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