Thermal oxidation process of SBS-g-MAH by γ-ray irradiation

LI Yintao LI Linfan ZHANG Yan YAO Side XIE Leidong

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Thermal oxidation process of SBS-g-MAH by γ-ray irradiation

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- Thermal oxidation process of SBS-g-MAH by γ-ray irradiation
- NUCLEAR TECHNIQUES Vol. 32, Issue 5, (2009)
- 作者机构：
  
  中国科学院上海应用物理研究所
- 作者简介：
- 基金信息：
  
  中国科学院知识创新工程青年人才领域前沿项目(55120701)资助
- DOI：
  CLC： O631.3
- Published：01 May 2009
- 稿件说明：
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[1]李银涛,李林繁,张艳,姚思德,谢雷东.辐射接枝改性SBS-g-MAH热氧老化研究[J].核技术,2009,32(05):351-355.

LI Yintao LI Linfan ZHANG Yan YAO Side XIE Leidong. Thermal oxidation process of SBS-g-MAH by γ-ray irradiation[J]. Nuclear techniques, 2009, 32(5): 351-355.
[1]李银涛,李林繁,张艳,姚思德,谢雷东.辐射接枝改性SBS-g-MAH热氧老化研究[J].核技术,2009,32(05):351-355. DOI：

LI Yintao LI Linfan ZHANG Yan YAO Side XIE Leidong. Thermal oxidation process of SBS-g-MAH by γ-ray irradiation[J]. Nuclear techniques, 2009, 32(5): 351-355. DOI：

摘要

采用DSC程序和红外分析等方法

研究了辐射接枝改性SBS-g-MAH与原始苯乙烯-丁二烯-苯乙烯嵌段共聚物（Styrene-butadiene-styrene block copolymer

SBS）的热氧化过程。结果表明

SBS热氧化属于自由基自催化反应

同时伴随高分子链的断裂和交联

但以热降解为主。通过SBS氧化机理的探讨

推测其热氧化产物为醇、醛、酸、酸酐等。辐射接枝改性SBS与原始SBS相比

碳碳双键及与双键相邻的活泼α-H密度降低

是造成其起始氧化温度升高、氧化诱导期增加的主要因素

预计在改性沥青应用中其热氧稳定性优于原始SBS。

Abstract

Thermal oxidation processes of styrene-butadiene-styrene(SBS) copolymer grafted by γ-rays with maleic anhydride(MAH)

and pure SBS

were studied using FT-IR and DSC analysis.The results show that the thermal oxidation process of SBS is a free radical self-catalyzed reaction with both crosslinking and scission and the latter is the main process.The thermal oxidation productions may be alcohol

aldehyde

acid

anhydride

etc.Comparing with pure SBS

the inducing temperature and oxidation time involved in oxidation process of SBS-g-MAH increase due to the reduction of double bond and α-H in PB segment.It can be predicated that the thermo-oxidative stability of SBS-g-MAH would be better than that of SBS in application for polymer modified asphalt.

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