CAJ | 학술논문

用自旋标记方法将氮氧自由基连接在聚乙二醇分子末端，研究了聚乙二醇/聚乙烯吡咯烷酮合金体系的链段运动.测得了体系在不同温度时的ESR谱，混合体系的ESR谱图由快运动和慢运动两部分组成，且两组分相对比例随着温度变化发生变化，表明混合体系中氮氧自由基处于不同的环境中.根据谱图参数计算得体系中快运动部分的旋转相关时间τc在10-9～10-11s之间，并由2AZZ′获得了体系的T5mT.结果表明由于体系中聚乙二醇和聚乙烯吡咯烷酮异种分子间的相互作用，体系中高分子链运动发生了变化.
용자선표기방법장담양자유기련접재취을이순분자말단，연구료취을이순/취을희필각완동합금체계적련단운동.측득료체계재불동온도시적ESR보，혼합체계적ESR보도유쾌운동화만운동량부분조성，차량조분상대비례수착온도변화발생변화，표명혼합체계중담양자유기처우불동적배경중.근거보도삼수계산득체계중쾌운동부분적선전상관시간τc재10-9～10-11s지간，병유2AZZ′획득료체계적T5mT.결과표명유우체계중취을이순화취을희필각완동이충분자간적상호작용，체계중고분자련운동발생료변화.
The spin label ESR was used to study the chain motion in the PEG/PVP blends under different temperatures. In the ESR spectrum, there were two components in the PEG/PVP blends, indicating the different environments in the blends, while there was only slow component in the low temperature and only fast component in high temperature in SLPEG. With the ESR spectrum parameter, the calculated correlation time of the fast component of the samples was between 10-9～10-11s and T5mT of all samples was obtained from the out splitting width. The results for the T5mT and the correlation time showed that there was interaction between different polymer chains in the blends.