双键侧含苯基硒醚的马来酰亚胺聚合物的光响应和光降解

Photoresponse and Photodegradation Behaviors of Maleimide Polymers with Phenyl Selenide in the Side of Double Bond

马来酰亚胺聚合物是潜在的优异的光学材料,但如果这些聚合物不能降解,势必存在环境污染等问题。文中在笔者之前报道的双键侧含苯基硒醚的马来酰亚胺聚合物的基础上,在常规的结构表征后,利用凝胶渗透色谱(GPC)、紫外可见(UV-vis)光谱和电子自旋共振谱(ESR)进一步研究了聚合物的光响应和光降解。结果表明,所制备的聚合物用紫外光照射1 h,相对分子质量减小1倍,且随着光照时间的延长,相对分子质量继续下降,但外加相应的硒醚化合物到侧链不含苯基硒醚的马来酰亚胺聚合物中,紫外光照后并不能引起降解行为。另外,还研究了硒醚换成硫醚后马来酰亚胺聚合物的降解行为,发现硫醚的引入并不能使聚合物降解。

Maleimide polymers are used as potentially excellent optical materials,but if these polymers cannot be degraded,them will bring environmental pollution and other problems.Based on our previous work about maleimide polymer with phenyl selenide in the side of double bond,gel permeation chromatography(GPC),ultraviolet-visible(UV-vis)spectrum and electron spin resonance(ESR)spectroscopy were utilized to study the photoresponse and photodegradation behaviors of these polymers.The results show when the prepared polymers are irradiated 1 h by UV light,their number molecular weight(M_(n))will reduce to be half.With the extension of irradiation time,the molecular weight of these polymers will reduce in continue.However,selenide compound is added into the maleimide polymer without phenyl selenide group,and it will not bring light degradation after UV irradiation.In addition,it is found that similar structure maleimide polymer cannot be degraded by UV light after changing selenide structure to thioether structure.