紫外光辐照钕系聚丁二烯的谱学研究  

Spectrum Study of 1,4-Polybutadiene Under UV Irradiation

作　　者：马燕[1] 孙万赋[1] 王强[1] 丁成丽[1] 王传贝[1] 赵新[1,2] 

机构地区：[1]新疆大学理化测试中心,新疆乌鲁木齐830046 [2]中国科学院武汉物理与数学研究所波谱与原子分子物理国家重点实验室,湖北武汉430071

出　　处：《新疆大学学报（自然科学版）》2009年第2期212-216,共5页Journal of Xinjiang University(Natural Science Edition)

基　　金：波谱与原子分子物理国家重点实验室资助课题

摘　　要：用1HNMR谱,13CNMR谱,二维谱,X-射线衍射等方法研究了钕系高顺式聚丁二烯橡胶(NdBR)在强UV光辐照前后的分子微观结构的变化情况.结果表明NdBR随着UV光辐照时间的增加,侧链乙烯基端基双键比主链端基双键更易发生氧化反应.并且NdBR样品的半峰宽值逐渐增加,表明NdBR在UV辐照过程中发生了部分交联反应.样品的X-射线衍射谱图中结晶峰强度随UV光辐照时间的增加逐渐降低,表明样品的晶形无序程度增加了.The radiation effects of high cis-1,4-Polybutadiene（NdBR） under UV irradiation were studied by 1D and 2D NMR spectroscopy and X-ray diffraction. The results indicated that the oxidation reaction taken place more easily at the doble bond terminated in the main chain than in the side vinyl group terminated of polybutadiene with the increase of UV irradiation time. Moreover, the sample halfwidth increased, it indicated that the sample occurs crosslinking reaction in the processing of irradiation. The data from X-ray diffraction showed that the crystallization peak intensity of the sample was decreased with UV irradiation time increase. This indicated that the crystal content of the sample are down after UV irradiation.

关 键 词：NMR X-衍射 釹系高顺式聚丁二烯橡胶 紫外光 

分 类 号：O631.34[理学—高分子化学]