| Study on Activation Mechanism of Blowing Agent H and Its Effects on Foaming of NR |
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| DOI： |
| Key Words: blowing agent；urea；NR；decomposition characteristics；foaming property |
| Author Name | Affiliation | | ZHOU Yang | Shanghai Jiaotong University | | PENG Zong-lin | Shanghai Jiaotong University | | JIANG Shu-qin | Shanghai Jiaotong University |
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| Abstract: |
| The mechanism of the interaction between blowing agent H and urea，and their effects on the vulcanization and foaming property of NR were investigated.The results showed that，the decomposition course of blowing agent H/urea blend was different from their own decomposition reactions.The reaction temperature range was from 130 ℃ to 180 ℃，and the decomposition peak temperature was about 150 ℃.With equivalent blending ratio or with slightly higher urea level，the foaming effect was the best，and both blowing agent H and urea had significant accelerating effects on the vulcanization of NR.The dispersion of urea had significant effect on the pore uniformity of NR foam. |
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