SYNTHESIS AND PROPERTIES OF SULFUR-HETEROCYCLIC-BRIDGEDPOLYIMIDES WITH HIGH REFRACTIVE INDEX

LIU Jingang; LI Zhuo; GAO Zhiqi; YANG Haixia; YANG Shiyong

doi:10.3724/SP.J.1105.2009.00011

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SYNTHESIS AND PROPERTIES OF SULFUR-HETEROCYCLIC-BRIDGEDPOLYIMIDES WITH HIGH REFRACTIVE INDEX

Research Article | 更新时间：2021-03-19

- SYNTHESIS AND PROPERTIES OF SULFUR-HETEROCYCLIC-BRIDGEDPOLYIMIDES WITH HIGH REFRACTIVE INDEX
- Acta Polymerica Sinica Issue 1, Pages: 11-16(2009)
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- DOI：10.3724/SP.J.1105.2009.00011
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- Published：20 January 2009，
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LIU Jingang, LI Zhuo, GAO Zhiqi, YANG Haixia, YANG Shiyong. SYNTHESIS AND PROPERTIES OF SULFUR-HETEROCYCLIC-BRIDGEDPOLYIMIDES WITH HIGH REFRACTIVE INDEX. [J]. Acta Polymerica Sinica (1):11-16(2009)
DOI：

LIU Jingang, LI Zhuo, GAO Zhiqi, YANG Haixia, YANG Shiyong. SYNTHESIS AND PROPERTIES OF SULFUR-HETEROCYCLIC-BRIDGEDPOLYIMIDES WITH HIGH REFRACTIVE INDEX. [J]. Acta Polymerica Sinica (1):11-16(2009) DOI： 10.3724/SP.J.1105.2009.00011.

摘要

合成了两种含硫杂环桥联的芳香族二胺单体，2

5-双(4-氨基苯硫基)噻吩（APST）以及2

5-双(4-氨基苯硫基)-1

4-噻二唑 (BATT).分别采用这两种二胺单体与含硫二酐单体4

4′-双(3

4-二羧基苯硫基)二苯硫醚二酐（3SDEA）通过两步聚合法制备了两种聚酰亚胺（PI）， PI-1(3SDEA-APST)与PI-2(3SDEA-BATT).系统研究了含硫杂环对PI耐热性能以及光学性能的影响.研究结果表明，与苯环相比，含硫杂环的引入在一定程度上降低了PI薄膜在可见光区（400～700 nm）的光学透明性以及耐热稳定性.PI1与PI2薄膜的起始热分解温度（T5％）分别为418℃与466℃.PI薄膜在450 nm处的透光率低于50％.但是含硫杂环的引入可以显著提高PI薄膜的折射率.PI-1与PI-2的折射率分别为1.7527和1.7490.两种材料的双折射均小于0.01.

Abstract

A series of modified polyimides (PIs) exhibiting refractive indices higher than 1.74 were developed by the introduction of sulfur-containing moieties.First

two sulfurheterocyclic-bridged diamines

5-bis(4-aminophenylenesulfanyl)thiophene (APST) and 2

5-bis(4-aminophenylenesulfanyl)-1

4-thiadiazole (BATT) were synthesized.The two diamines were polymerized with a sulfurcontaining dianhydride 4

4′-［p-thiobis(phenylenesulfanyl)］ diphthalic anhydride (3SDEA) respectively via a two-step polymerization procedure to afford two polyimides (PIs)

PI-1 (3SDEA-APST) and PI-2 (3SDEA-BATT).The effects of the sulfur-heterocyclic structure on the properties of the PIs are investigated.It was found that the introduction of the heterocyclic structure decreased the thermal stability and the optical transparency of the PI films to some extent.The initial thermal decomposition temperatures of the PIs are 418℃ for PI-1 and 466℃ for PI-2.The transmittance of the PI films at 450 nm is lower than 50%.However

the sulfur-heterocyclic structure apparently increases the refractive indices of the PI films.The PIs show refractive index of 1.7527 for PI-1 and 1.7490 for PI-2.In addition

the PIs have birefringences lower than 0.01.

关键词

聚酰亚胺高折射率噻吩噻二唑热稳定性光学透明性

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1Department of Polymeric Materials and Engineering,College of Material and Energy,Guangdong University of Technology

汕头大学理学院化学系

汕头大学理学院化学系广州510006汕头大学理学院化学系汕头

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