( 1. 湖南科技大學(xué) 化學(xué)化工學(xué)院材料科學(xué)與工程系, 湘潭 411201;
2. 中南大學(xué) 化學(xué)化工學(xué)院 有機(jī)功能高分子研究所, 長(zhǎng)沙 410083)
摘 要: 用示差掃描量熱法（DSC）研究了聚氧化乙烯（PEO）及其與高氯酸鋰（LiClO4）復(fù)合體系的非等溫結(jié)晶過程。依次用Jeziorny方法、一種結(jié)合Avrami和Ozawa方程的方法分析了以上體系中PEO的非等溫結(jié)晶過程， 得到了PEO在不同體系中非等溫結(jié)晶時(shí)的動(dòng)力學(xué)參數(shù)。動(dòng)力學(xué)參數(shù)表明LiClO4晶粒縮短了PEO的結(jié)晶時(shí)間，使復(fù)合體系中PEO的結(jié)晶速率大于PEO體系的，但PEO體系形成更完善晶體；為使二者達(dá)到相同的相對(duì)結(jié)晶度，PEO體系需要更大的冷卻速率。結(jié)果表明， LiClO4晶粒能夠有效地將PEO的結(jié)晶相轉(zhuǎn)變成非晶相，即LiClO4可有效地抑制PEO的結(jié)晶過程。
關(guān)鍵字: 聚氧化乙烯（PEO）；高氯酸鋰；復(fù)合體系；非等溫；結(jié)晶動(dòng)力學(xué)
poly(ethylene oxide) and its composite with lithium perchlorate
（ 1. School of Chemistry and Chemical Engineering,
Hunan University of Science and Technology, Xiangtan 411201, China;
2. Institute of Organic Chemistry and Functional Polymer,
School of Chemistry and Chemical Engineering,
Central South University, Changsha 410083, China）
Abstract: The non-isothermal crystallization kinetics of poly(ethylene oxide)（PEO） and its composite with lithium perchlorate（LiClO4） were investigated via differential scanning calorimetry（DSC）.Non-isothermal crystallization process of PEO in the above system was described by Jeziorny method and a new method combined with the Avrami and Ozawa equation. The kinetics parameters of PEO in various system were obtained. The results show that grains of LiClO4 have curtailed crystalline time of PEO, and the overall crystallization rate of PEO in composite is higher than that of PEO system. However, more perfect crystal is formed in PEO system. A conclusion can be deduced that LiClO4 can be effective in producing and stabilizing the amorphous structure of PEO, that is to say, the addition of LiClO4 can availably hinder PEO crystallization.
Key words: poly(ethylene oxide); lithium perchlorate; composite; non-isothermal; crystallization kinetics
