含有添加剂及LiClO_4的接枝聚酯网络的离子导电性能研究  

THE EFFECT OF POLAR ADDITIVES ON IONIC CONDUCTIVITY OF GRAFT POLYESTER NETWORK CONTAINING LiClO_4

作　　者：李丹[1] 胡春圃[1] 应圣康[1] 

机构地区：[1]华东理工大学院材料科学与工程研究所

出　　处：《高分子学报》1994年第6期680-686,共7页Acta Polymerica Sinica

基　　金：国家自然科学基金

摘　　要：研究了碳酸丙烯酯（添加量５％）与γ－丁内酯（添加量１０％）对由数均分子量为８００的聚氧化乙烯（ＰＥＯ８００）大单体交联不饱和聚酯（含ＬｉＣｌＯ４）形成的接枝聚酯网络的离子导电性能影响，发现其电导率主要取决于体系中的ＬｉＣｌＯ４浓度．当［ＥＯ链节］／［Ｌｉ＋］＝３０时，室温电导率达最大值，σ２９８Ｋ＝（４．０—４．５）×１０－５Ｓｃｍ－１．这类接枝聚酯网络的玻璃化转变温度（Ｔｇ）同样取决于盐类浓度，而与网络的交联程度无关．网络中的极性添加剂并不显著影响其交联程度与Ｔｇ，但较大幅度提高离子导电性能，这可能与极性添加剂加速载荷离子在导电通道中的迁移性有关．若在上述接枝网络中引入环氧树脂网络，形成接枝聚合物互穿网络，则成膜后的机械强度有进一步提高，同时具有优良的室温电导率，σ２９８Ｋ＝２．４×１０－５Ｓｃｍ－１。effects of propylene carbonate (PC, 5% by wt.) and r-butylactone (rBL,10% by wt.)upon the ionic conductivity of graft polyester network formed byPEO 800 macromer and unsatUrated Polyester containing LiClO4 were studied.The conductivity was found to be mainly detendned by the concentration ofLiClO4, with a makimum room temperature conduedvity, σ289k=4。0 -4.5×10-5 Scm-l1 at [Eo unit]/ [Li+]= 30. Little corration was observed between glasstransition temperature (Tg) and crosslinking degree for such polymer eleCtrolytes,and the effeCt of LiClO4 concenthetion on Tg was also observed. The introduction ofpolar additives into the network increased the ionic conductivity gutly, while exerting little influence on Tg and degree of crosslinking. Thus, these may be contributed to the increase of ion mobility in the conducting pathway.The formahon of grsft IPN by using graft polyester and epoxy resin furtherimproved the mechnical strength of the film sample, maintaiaing high conduedvityat room temperyture,σ298k= 2.4 × 10-5 Scm- 1.

关 键 词：添加剂 高氯酸锂 接枝聚酯网络 离子导电性 

分 类 号：O633.14[理学—高分子化学]