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Measurement of Thermal Shrinkage/Expansion Force of Filled Rubber  

Park, Sang-Min (Center for Functional Nano Fine Chemicals (BK 21) School of Applied Chemical Engineering, Chonnam National University)
Hong, Chang-Kook (Center for Functional Nano Fine Chemicals (BK 21) School of Applied Chemical Engineering, Chonnam National University)
Cho, Dong-Lyun (Center for Functional Nano Fine Chemicals (BK 21) School of Applied Chemical Engineering, Chonnam National University)
Kaang, Shin-Young (Center for Functional Nano Fine Chemicals (BK 21) School of Applied Chemical Engineering, Chonnam National University)
Publication Information
Elastomers and Composites / v.42, no.4, 2007 , pp. 201-208 More about this Journal
Abstract
In this study, the thermal shrinkage and expansion stresses of filled NR and SBR vulcanizates were measured to investigate the dimensional stability at an elevated temperature. When a rubber sample was held at constant pre-strain, a thermal stress developed upon heating due to the entropic consideration. The peak shrinkage stress of carbon black or silica filled NR decreased with increasing filler content. In SBR compounds, however, the peak shrinkage stress of SBR with 30 phr filler content was higher than that of unfilled compounds. The expansion stress of carbon black filled NR was changed little, but that of filled SBR increased with increasing the filler content. The peak expansion stress of silica filled NR and SBR vulcanizates increased with increasing silica content.
Keywords
thermal; filled rubber; dimensional stability; shrinkage; expansion;
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