Preparation and Properties of High Performance Bio-based Elastomer Based on Methyl Methacrylate Grafted Natural Rubber

Zhou Gong; Tao Peng; Li-ming Cao; Xiao-dong Cao; Yu-kun Chen

doi:10.11777/j.issn1000-3304.2020.20118

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Preparation and Properties of High Performance Bio-based Elastomer Based on Methyl Methacrylate Grafted Natural Rubber

更新时间：2021-01-26

- Preparation and Properties of High Performance Bio-based Elastomer Based on Methyl Methacrylate Grafted Natural Rubber
- Acta Polymerica Sinica Vol. 51, Issue 8, Pages: 949-958(2020)
- 作者机构：
  
  1.华南理工大学机械与汽车工程学院
  2.South China University of Technology, Guangzhou 510640 School of Materials Science and Engineering,
- 作者简介：
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2020.20118
  CLC：
- Published：2020-8，
  
  Published Online：18 July 2020，
  
  Received：11 May 2020，
  
  Revised：1 June 2020，
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Zhou Gong, Tao Peng, Li-ming Cao, Xiao-dong Cao, Yu-kun Chen. Preparation and Properties of High Performance Bio-based Elastomer Based on Methyl Methacrylate Grafted Natural Rubber. [J]. Acta Polymerica Sinica 51(8):949-958(2020)
DOI：

Zhou Gong, Tao Peng, Li-ming Cao, Xiao-dong Cao, Yu-kun Chen. Preparation and Properties of High Performance Bio-based Elastomer Based on Methyl Methacrylate Grafted Natural Rubber. [J]. Acta Polymerica Sinica 51(8):949-958(2020) DOI： 10.11777/j.issn1000-3304.2020.20118.

摘要

天甲橡胶(MGNR)是生物基高分子材料天然橡胶(NR)的一种改性产品，较高的门尼黏度导致MGNR作为橡胶制品主要成分的研究鲜见报道. 本文将极性的MGNR与非极性的NR并用，NR分子链较高的柔顺性使MGNR的门尼黏度得到有效降低，改善了MGNR的加工性能. 进而添加表面具有硅羟基的气相法白炭黑，一方面，白炭黑与MGNR、NR形成结合胶；另一方面，白炭黑表面的硅羟基与MGNR的侧链甲基丙烯酸甲酯形成较强的相互作用，白炭黑作为“桥梁”改善了MGNR与NR之间的相容性. 随着白炭黑含量的提高，MGNR/NR(40/60)硫化胶的拉伸强度与断裂伸长率均逐渐增大. 当白炭黑的填充量为10 phr时，硫化胶的拉伸强度为31.2 MPa，断裂伸长率为605%. 相比于未填充白炭黑的硫化胶分别提高了42.4%和28.9%，相比于纯MGNR分别提高了55.2%和93.9%.

Abstract

Methyl methacrylate grafted natural rubber (MGNR) is one of the modified products of biology-based natural rubber (NR). The relatively high Mooney viscosity of pure MGNR restrict its applications. Thus

it is rarely reported as the main component of rubber products. In this paper

polar MGNR and non-polar NR were blended. The high flexibility of NR molecular chains effectively reduces the Mooney viscosity of MGNR

improving the processability of MGNR. Besides

fumed silica with Si―OH on its surface was added. On the one hand

silica forms bonded rubber with MGNR and NR chains. On the other hand

Si―OH on the surface of fumed silica interacts strongly with methyl methacrylate grafted on MGNR

and silica acts as a “bridge” to improve the compatibility between MGNR and NR. As the content of fumed silica increased

the tensile strength and elongation at break of MGNR/NR (40/60) blend gradually improved. When the content of fumed silica was 10 phr

the tensile strength of the blend was 31.2 MPa

which improved by 42.4% and 55.2% compared with those of the blend without fumed silica and the pure MGNR

respectively. Meanwhile

the elongation at break of the blend was 605%

raised by 28.9% and 93.9% compared with those of the blend without fumed silica and the pure MGNR.

关键词

天甲橡胶天然橡胶加工性能相容性

Keywords

Methyl methacrylate grafted natural rubberNatural rubberProcessing performanceCompatibility

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State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences

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