作　　者： ; ;

机构地区： 华南热带作物产品加工设计研究所设计室

出　　处： 《橡胶工业》 1998年第8期494-498,共5页

摘　　要： 用傅立叶转换红外光谱（ＦＴＩＲ）研究了ＮＲ、环氧化天然橡胶（ＥＮＲ）和氯化天然橡胶（ＣＮＲ）的热老化行为。以老化前后的差减光谱表征橡胶老化过程中分子结构的动态变化，提高了灵敏度和准确性。ＮＲ与ＥＮＲ的热老化同属自动催化氧化反应，产物均为羧酸、醛、酮、醚和酯等；ＣＮＲ在８０℃时开始脱ＨＣｌ，并随老化温度的提高脱ＨＣｌ的程度增大。 The thermal aging behaviour of NR,ENR and CNR was studied by using Fourier Transform Infrared Spectroscopy(FTIR).The differrence of the spectra before aging from those after aging was used to characterize the dynamic changes of rubber molecule structure during the thermal aging.The thermal aging of NR and ENR was a selfcatalyzed reaction,and their products were carboxylic acid,aldehyde,ketone,ether and ester;CNR started to dehydrochlorinate at 80 ℃ and it dehydrochlorinated faster as the temperature increased.

关 键 词： 红外光谱 热老化 橡胶 老化

领　　域： [化学工程]