| Effect of Preparation Processes on Properties of NR |
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| DOI： |
| Key Words: NR；preparation process；physical property；dynamic property |
| Author Name | Affiliation | | ZENG Zong-qiang | Agricultural Product Processing Research Institute,Chinese Academy of Tropical Agriculture Science；National Technology and Engineering Center of Key Tropical Product | | HUANG Mao-fang | Agricultural Product Processing Research Institute,Chinese Academy of Tropical Agriculture Science；National Technology and Engineering Center of Key Tropical Product | | ZHANG Bei-long | Agricultural Product Processing Research Institute,Chinese Academy of Tropical Agriculture Science | | LIANG Yue | Agricultural Product Processing Research Institute,Chinese Academy of Tropical Agriculture Science |
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| Abstract: |
| Four kinds of NRs were obtained by coagulating the fresh NR latex(NRL) with different processes:NRL coagulated by acetic acid(NR-1),NRL coagulated by microorganism(NR-2),ethanolamine-blended NRL coagulated by microorganism(NR-3)，and protease-blended NRL coagulated naturally（NR-4）.The effect of preparation processes on the properties of NR was investigated.The results showed that，the raw NR-1 and NR-2 possessed better thermal aging property and thermal stability than the raw NR-3 and NR-4.The MHof NR-4 compound was the highest，and its t90 was the shortest.The MH of NR-3 compound was lower，and its t90 was the longest.The NR-4 vulcanizate possessed higher modulus and tensile strength，lower elongation at break.The NR-1 vulcanizate possessed lower modulus and tensile strength.The raw rubber,compound and vulcanizate of NR-4 exhibited the highest elastic torques(S′) and shear storage modulus（G′） and the lowest loss factors,whereas the lowest S′and G′ and the highest loss factors were observed from those of NR-1. |
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