Semi-aromatic Polyamides Containing Siloxane Unit toward High Performance

Jia-wei Long; Xiao-hui Shi; Bo-wen Liu; Peng Lu; Li Chen; Yu-zhong Wang

doi:10.11777/j.issn1000-3304.2020.20125

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Semi-aromatic Polyamides Containing Siloxane Unit toward High Performance

更新时间：2021-01-26

- Semi-aromatic Polyamides Containing Siloxane Unit toward High Performance
- Acta Polymerica Sinica Vol. 51, Issue 7, Pages: 681-686(2020)
- 作者机构：
  
  四川大学化学学院环境与火安全高分子材料协同创新中心环保型高分子材料国家地方联合工程实验室高分子材料工程国家重点实验室　成都 610064
- 作者简介：
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2020.20125
  CLC：
- Published：2020-7，
  
  Published Online：15 June 2020，
  
  Received：15 May 2020，
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Jia-wei Long, Xiao-hui Shi, Bo-wen Liu, Peng Lu, Li Chen, Yu-zhong Wang. Semi-aromatic Polyamides Containing Siloxane Unit toward High Performance. [J]. Acta Polymerica Sinica 51(7):681-686(2020)
DOI：

Jia-wei Long, Xiao-hui Shi, Bo-wen Liu, Peng Lu, Li Chen, Yu-zhong Wang. Semi-aromatic Polyamides Containing Siloxane Unit toward High Performance. [J]. Acta Polymerica Sinica 51(7):681-686(2020) DOI： 10.11777/j.issn1000-3304.2020.20125.

摘要

通过芳香族亲核取代反应合成了一系列含硅氧烷基元主链结构的半芳香族共聚酰胺. 研究发现，共聚酰胺具有较高的分子量和较窄的分子量分布. 硅氧烷结构的引入不仅赋予了共聚酰胺低的吸水率，而且使其能保持良好的力学性能，当硅氧烷结构含量为10 mol%时，拉伸强度达到80.0 MPa，缺口冲击强度为4.8 kJ/m

，可与商品化HTN产品相媲美. 阻燃性能测试结果可知，在不添加磷、卤等传统阻燃剂的情况下，随着硅氧烷结构含量的增加，共聚酰胺表现出良好的阻燃抗熔滴效果. 当共聚酰胺中硅氧烷结构含量为10 mol%时，极限氧指数可达33.5%，可通过UL-94垂直燃烧V-0级.

Abstract

Semi-aromatic polyamides (SaPAs) and their derivatives combining each advantage of aromatic and aliphatic polyamides receive ever-increasing interest in both academic and industrial fields. However

severe challenges

such as processibility and flammability of SaPAs still remain which limit their versatile applications. In order to endow satistied processibility of SaPAs either in melt or in solution

tremendous efforts have been explored to weaken the interchain cohesive energy by chemical modification of the SaPAs’ backbones or side groups. Unfortunately

their flame retardancy got even worse. In this work

a novel series of SaPAs containing flexible siloxane spacers and rigid fluorenyl pendent

termed P-FPH

100−

were designed and synthesized through the aromatic nucleophilic substitution (S

Ar) polycondensation. The effects of both the fluorenyl pendent and siloxane spacers on the comprehensive properties of the semi-aromatic polyamides were comprehensively investigated. On the one hand

the presence of the rigid fluorenyl pendent endowed the resulting P-FPH

100−

with enhanced thermal stability and mechanical properties

compared with the commercially available HTN. On the other hand

with increasing content of the siloxane spacers

their tensile strength and impact strength gradually decreased. Most importantly

by introducing the silaxane spacers

P-FPH

100−

displayed intrinsic flame retardancy and anti-dripping performance despite the absence of conventional P-/N-containing flame retardants. When the content of the siloxane spacers was 10 mol%

the P-FPH

did not only achieve the V-0 rating in UL-94 burning test with limiting oxygen index (LOI) as high as 33.5%

but also maintain 80.0 MPa of tensile strength and 4.8 kJ/m

of the notched Izod impact strength. Taking the aforementioned advantages

this kind of novel SaPAs hold potential in a wide range of applications.

关键词

共聚酰胺硅氧烷间隔基元力学性能阻燃

Keywords

CopolyamideSiloxane spacerMechanical propertiesFlame retardancy

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Related Institution

College of Materials Science and Engineering, Qingdao University

Department of Polymer Science and Engineering, Zhejiang University

State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University

Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University

Zheda Institute of Advanced Materials and Chemical Engineering

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