| 制备工艺对NR性能的影响 |
| Effect of Preparation Processes on Properties of NR |
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| DOI： |
| 中文关键词: NR 制备工艺 物理性能 动态性能 |
| 英文关键词: NR preparation process physical property dynamic property |
| 基金项目:国家自然科学基金资助项目（50963006）；现代农业产业技术体系建设专项资金资助项目（nycytx-34-GW3）；海南省自然科学基金资助项目（807047） |
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| 中文摘要: |
| 采用新鲜天然胶乳分别制备乙酸凝固NR（NR-1）、微生物凝固NR（NR-2）、乙醇胺混合微生物凝固NR（NR-3）和蛋白酶混合自然凝固NR（NR-4），研究制备工艺对NR性能的影响。结果表明：NR-1和NR-2生胶的耐热老化性能和热稳定性好于NR-3和NR-4生胶；NR-4胶料的MH最大,t90最短，NR-3胶料的MH较小，t90最长；NR-4硫化胶的定伸应力和拉伸强度较大，拉断伸长率较小，NR-1硫化胶的定伸应力和拉伸强度较小；NR-4生胶、混炼胶和硫化胶的弹性转矩(S′)和剪切储能模量（G′）最大，损耗因子（tanδ）最小，NR-1生胶、混炼胶和硫化胶的S′和G′最小，tanδ值最大。 |
| 英文摘要: |
| 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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