|本期目录/Table of Contents|

[1]张桂梅,姜士宽,岩 利,等.氮含量对木瓜蛋白酶凝固天然橡胶性能的影响[J].合成橡胶工业,2023,1:19-22.
 ZHANG Gui-mei,JIANG Shi-kuan,YAN Li,et al.Effect of nitrogen content on properties of natural rubber coagulated by papain[J].China synthetic rubber industy,2023,1:19-22.
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氮含量对木瓜蛋白酶凝固天然橡胶性能的影响(PDF)

《合成橡胶工业》[ISSN:1000-1255/CN:62-1036/TQ]

期数:
2023年1期
页码:
19-22
栏目:
出版日期:
2023-01-15

文章信息/Info

Title:
Effect of nitrogen content on properties of natural rubber coagulated by papain
文章编号:
1000-1255(2023)01-0019-04
作者:
张桂梅姜士宽岩 利祝 翱邹建云?鄢
云南省热带作物科学研究所,云南 景洪 666100
Author(s):
ZHANG Gui-mei JIANG Shi-kuan YAN Li ZHU Ao ZOU Jian-yun
Yunnan Institute of Tropical Crops, Jinghong 666100, China
关键词:
天然橡胶木瓜蛋白酶氮含量硫化特性物理机械性能压缩疲劳生热动态力学性能
Keywords:
natural rubber papain nitrogen content curing characteristics physical and mechanical property compression fatigue heat build-up dynamic mechanical property
分类号:
TQ 332.1
DOI:
DOI:10.19908/j.cnki.ISSN1000-1255.2023.01.0019
文献标识码:
A
摘要:
利用木瓜蛋白酶凝固天然胶乳制备了不同氮含量的天然橡胶(NR-P),研究了NR-P的生胶理化性能和混炼胶硫化特性,以及硫化胶的物理机械性能、压缩疲劳生热和动态力学性能,并与酸凝天然橡胶(NR-A)进行了对比。结果表明,随着氮含量的降低,NR-P的塑性初值先降低再趋于稳定,塑性保持率则稍有下降;混炼胶的硫化速率增大;硫化胶的300%定伸应力和拉伸强度均呈现先增大后稍有减小的趋势,压缩温升和滚动阻力都基本呈现减小趋势。与NR-A相比,NR-P的氮含量较低,但其塑性初值较高而塑性保持率稍低,硫化速率及拉伸强度也优于NR-A。当含氮质量分数处于0.18%~0.23%时,NR-P具有较快的硫化速率,较好的物理机械性能、压缩疲劳生热性能和动态力学性能。
Abstract:
Natural rubber with different nitrogen content (NR-P) was prepared by coagulation from fresh hevea latex with papain as granulation agent. The physical and chemical properties, curing cha-racteristics, physical and mechanical properties, compression fatigue heat build-up and dynamic mechanical properties of NR-P were studied and compared with that of acid-coagulated natural rubber (NR-A).The results showed that with decrease of nitrogen content, the initial plasticity of NR-P decreased first and then leveled off, while the plasticity retention index decreased slightly. The curing rate of the rubber compound with NR-P became faster, the modulus at 300%, tensile strength first increased and then decreased slightly. Besides, the heat build-up and rolling resistance of natural rubber vulcanizate also showed a decreasing trend. Compared with NR-A, the nitrogen content of NR-P was lower, but the initial plasticity was higher and plasticity retention index was slightly lower, and the curing rate and tensile strength were also better than that of NR-A. When the mass fraction of nitrogen of natural rubber was in the range of 0.18% to 0.23%, NR-P compounds exhibited faster curing rate, better mechanical properties, lower compression fatigue heat build-up and dynamic mechanical properties.

参考文献/References

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备注/Memo

备注/Memo:
云南省热带作物科技创新体系建设项目(RF 2021);云南省现代农业橡胶产业技术体系建设专项(2021 KJTX 008)
更新日期/Last Update: 2023-01-15