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Study on molecular structure and property of highly purified natural rubber
Journal of Analytical and Applied Pyrolysis ( IF 6 ) Pub Date : 2018-09-01 , DOI: 10.1016/j.jaap.2018.05.018
Bei L. Zhang , Hong H. Huang , Yong Z. Wang , Li Ding , Yue Liang

Abstract The molecular structure, mechanical property and dynamic mechanics performance of highly purified natural rubber (highly purified NR) were studied. The FTIR results showed that there was no stretching vibration absorption peak of N H group on 3280 cm−1 and vibration compound peak of C N group and N H group in amide group on 1540 cm−1 in highly purified NR compared to natural rubber (NR). The pyrolytic products of highly purified NR are less than that of NR. The main pyrolytic products of highly purified NR are limonene, 1,3-pentadiene and 4-ethenyl-1,4-dimethyl-cyclohexene, which contained 58.98% of the total pyrolytic products by mass fraction. Curing time t90 of highly purified NR prolonged, and crosslinking density and tensile strength decreased. Elongation at break increased and anti-aging performance significantly decreased compared to NR. Dynamic mechanics performance of highly purified NR is rather different from that of NR.

中文翻译:

高纯天然橡胶的分子结构与性能研究

摘要 研究了高纯天然橡胶(高纯NR)的分子结构、力学性能和动态力学性能。FTIR结果表明,与天然橡胶(NR)相比,高纯度NR在3280 cm-1处没有NH基团的伸缩振动吸收峰,在酰胺基团中的CN和NH基团在1540 cm-1处没有振动复合峰。高纯NR的热解产物比NR少。高纯NR的主要热解产物为柠檬烯、1,3-戊二烯和4-乙烯基-1,4-二甲基环己烯,按质量分数计占热解产物总量的58.98%。高纯NR的固化时间t90延长,交联密度和拉伸强度降低。与NR相比,断裂伸长率增加,抗老化性能显着下降。高纯 NR 的动态力学性能与 NR 有很大不同。
更新日期:2018-09-01
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