Comparative Study on Properties of NBR and BNBR

Huai-guo TANG; Fang-zheng DING

doi:10.14028/j.cnki.1003-3726.2020.05.003

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Comparative Study on Properties of NBR and BNBR

更新时间：2022-08-31

- Comparative Study on Properties of NBR and BNBR
- Polymer Bulletin Vol. 33, Issue 5, Pages: 24-30(2020)
- 作者机构：
  
  1.中国航发北京航空材料研究院,北京 100095
  2.空装装备部驻北京地区军事代表局驻北京地区第六军事代表室,北京 100013
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2020.05.003
  CLC：
- Published：20 May 2020，
  
  Received：10 October 2019，
  
  Revised：15 March 2020，
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Huai-guo TANG, Fang-zheng DING. Comparative Study on Properties of NBR and BNBR. [J]. Polymer Bulletin 33(5):24-30(2020)
DOI：

Huai-guo TANG, Fang-zheng DING. Comparative Study on Properties of NBR and BNBR. [J]. Polymer Bulletin 33(5):24-30(2020) DOI： 10.14028/j.cnki.1003-3726.2020.05.003.

摘要

对丁腈橡胶和丁腈酯橡胶的物理机械性能和动态力学性能进行对比研究

讨论了分子结构对材料热氧老化和动态力学性能的影响。结果表明

丁腈橡胶和丁腈酯橡胶物理机械性能相当

热氧老化试验后丁腈酯表现出更优异的力学性能。在动态力学性能试验中

腈基极性强于酯基

侧基极性愈强

其相互间作用力愈大

单键内旋转愈困难

链的柔顺性愈差

同时丁腈酯的酯基具有柔性

可起到增塑剂的作用

综合因素导致丁腈酯橡胶在低温下的动态力学性能优于丁腈橡胶。热氧老化后

丁腈橡胶和丁腈酯橡胶交联度进一步提高

分子链之间的相互作用力变大导致剪切模量增大。丁腈橡胶的损耗因子偏大是由于丁腈橡胶有极性较强的侧腈基

链段运动时内摩擦阻力大内耗高

热氧老化后损耗因子进一步提高。

Abstract

The physical mechanical properties and dynamic mechanical properties of NBR and BNBR during thermaloxidative aging were compared

The effects of molecular structure on thermal-oxidative aging and dynamic mechanical properties were discussed. The results showed that the physical mechanical properties of NBR and BNBR were similar

and BNBR exhibited better mechanical properties after thermal oxidative aging test. In the dynamic mechanical properties test

the polarity of NBR is stronger than BNBR

the interaction force is greater

the rotation of single bond is more difficult

and the flexibility of chain is worse. At the same time

the BNBR has flexibility. The dynamic mechanical properties of BNBR at low temperature are better than that of NBR due to these two factors. The degree of crosslinking of the NBR and BNBR is further improved after thermal aging resulting in an increase in the shear modulus. The larger loss factor of NBR is due to the fact that the NBR has a more polar side nitrile group

The internal friction is further increased and the loss factor is further improved after thermal aging.

关键词

丁腈酯橡胶玻璃化转变温度热氧老化动态力学性能

Keywords

BNBRGlass transition temperatureThermo-oxidative agingDynamic mechanical properties

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