梳型聚醚-聚磺酸锂共混物的锂离子导电性

 本工作合成了聚甲基丙烯酸齐聚氧化乙烯酯和聚甲基丙烯酸己磺酸锂两系列聚合物,研究共聚物结构对共混物的相容性和锂离子导电性的影响.结果表明,共混物的相容性是决定离子电导率的主要因素;共混物内锂离子传导发生在非晶区,聚合物的链段运动是离子传导的主要推动力.     

聚丁二酸丁二酯与高氯酸锂络合物的结构与离子导电性

本文从丁二酸二甲酯和丁二醇合成了聚丁二酸丁二酯,并以高氯酸锂为掺杂剂制备了固体电解质。FT-IR、NMR、XPS测试发现酯基上的氧原子参与络合。WAXD、DSC等测试分析结果表明:络合物和聚酯的晶体相同;LiClO_4主要溶解在无定形区;盐的溶解降低聚酯的熔点、结晶度和结晶速度,而提高玻璃化温度;在低盐浓度区络合物熔点与盐浓度关系符合Flory-Huggins理论。络合物的电导率随盐浓度变化出现极大值,在低盐浓度区电导率与浓度的对数成线性关系。电解质的导电行为不能简单地为Arrhenius和WLF方程所解释。从扩散角度推导了导电方程,并描述了离子导电过程。     

脂肪族聚酯与高氯酸锂络合物的结构与导电性

本文通过酯交换反应合成了一系列脂肪族聚丁二酸酯,对他们的结构和性能作了表征。发现聚酯存在多晶现象,其熔点有奇偶性变化规律。探索了由此系列聚酯与高氯酸锂形成的固体电解质的结构和离子导电性。无机盐的加入提高了电解质的玻璃化温度但降低了聚酯的熔点及结晶度。聚酯电解质的晶体类似于聚酯,其无机盐主要溶解于聚酯的无定形区域。聚酯系列电解质的导电率也有偶奇效应,与熔点变化相反;熔点高的电解质导电率低,熔点低的电解质导电率高。电解质的导电率随温度改变而变化,在室温下电解质的导电率可达10~(-6)s/cm。高分子链上侧基的引入将大大降低电解质的导电性。     

聚苯醚磺酸锂与酯类增塑剂共混物的导电性

聚苯醚磺酸锂与酯类增塑剂共混物的导电性汪传清，黄玉惠，赵树录，丛广民（中国科学院广州化学研究所广州５１０６５０）关键词　聚苯醚磺酸锂，酯类增塑剂，共混，导电性能高分子固体电解质［１］可作为高能电池、电致变色等材料。聚环氧乙烷／碱金属盐复合物与无机盐构...     

低聚醚磺酸锂／梳形聚醚复合物的单离子导电性

A complex ionic conductor was prepared by solution complexation of lithium methoxy oligo (oxyethylene) sulfonate (SOL₈, where & is the repeating unit of oxyethylene) with comblike copolyether poly [methoxy oligo (oxyethylene)methacrylate-co-acrylamide] [P(MEO₁₆-AM)]. The composition dependences of glass transition temperature,crystallinity as well as conducti-vity of the complex were investigated. DC polarization showed that the complex shows a stable polarization characteristic. Polarization reversing method confirmed that the complex has a cati-onic transference number of 0.99.     

低聚醚磺酸锂／梳形聚醚复合物的单离子导电性

低聚醚磺酸锂／梳形聚醚复合物的单离子导电性郑云贵，万国祥（中国科学院成都有机化学研究所成都６１００４１）关键词低聚醚磺酸锂，单离子导体，阳离子迁移数聚合物阳离子导体一般采用单体盐与能促进离子迁移的单体通过共聚或将其均聚物共混的方式制备’‘－‘’．由于...     

聚甲基硅氧烷与极性物质、锂盐共混体系的离子传导性能

利用聚二甲基硅氧烷的柔顺性和成膜性，以及极性物质溶解无机盐的性能，制得了有较高离子传导率的高分子固体电解质膜．极性物质的种类与含量，高氯酸锂的含量及温度对膜的离子传导性有影响。由聚二甲基硅氧烷，聚乙二醇双锂及高氯酸锂组成的共混体系其离子传导率室温达２．６３×１０－５Ｓｃｍ－１．当此体系不含高氯酸锂且醇锂含量较高时．随醇锂含量增加膜离子传导率增加较快，室温下最高可达２．２４×１０－６ｃｍ－１，有可能得到性能较好的含聚乙二醇锂的单离子导体。     

聚苯醚磺酸锂与聚乙二醇共混体系的离子导电性

本文研究影响聚乙二醇（ＰＥＧ）增塑聚苯醚磺酸锂（ＳＰＰＯＬｉ）电导率的各种因素，如摩尔比，及ＰＥＧ分子量等。ＳＰＰＯＬｉ／ＰＥＧ具单离子导体的特征，试样最高室温电导可达１０＾－５Ｓ／ｃｍ。     

锂离子导电硫氧化物玻璃的电子能谱

锂离子导电硫氧化物玻璃的电子能谱高海春，孙长敏，火炎，张瑞峰，李兴林（中国科学院盐湖研究所西宁）（中国科学院长春应用化学研究所长春１３００２２）关键词固体电解质，锂离子导体，硫氧化物玻璃，ＸＰＳ用易极化的硫取代氧，可在Ｌｉ２Ｓ－Ｂ２Ｓ３－ＬｉＩ体系［...     

聚醚砜／聚酚氧共混体系相容性与力学性能

聚醚砜／聚酚氧共混体系相容性与力学性能姜振华，马荣堂，寇喜春，安立佳（吉林大学化学系长春）（中国科学院长春应用化学研究所长春１３００２２）关键词聚醚砜，聚酚氧，共混物，相容性，力学性能，熔体粘度聚醚砜（ＰＥＳ）是一种耐热特种工程塑料，但韧性差、熔体粘...     

ION CONDUCTION IN COMPLEX OF ACRYLONITRILE-COPOLYMERIZED COMB POLYETHER WITH LITHIUM PERCHLORATE

Poly (oligoether methacrylate-co-acrylonitrile) s, P (MEOn- AN), with oligoether pendants of different lengths were synthesized and the ion conduction property of their Li-salt complexes was studied as the function of polymer structure. At proper copolymer composition, lithium concentration and pendant length, the ion conductivity reaches 7.0×10~(-5)S/cm at ambient temperature, together with improved mechanical strength. The ion transport in the polymer media is assisted by segmental relaxation, which is confirmed both by the consistency between ion conductivity and T_g and by the study of TSC.     

IONIC CONDUCTIVITY IN THE COMPLEXES OF COMB-SHAPED POLYETHER WITH LITHIUM AROMATIC SULFONATE

Complexes of comb-shaped polyether and lithium aromatic sulfonates bearing different negative charge number were prepared by in situ thermal polymerization. Their conductivity depends deeply on salt content, ambient temperature and negative charge number of the added salts. Results show that anions can be partly immobilized by increasing their negative charges at lower temperature. Against discharge time the short circuit current of the battery (Li/complex film/Li_x V_3O_8) is stabilized by increasing the anionic charge number of the complex.     

聚对苯二甲酰对苯二胺对尼龙-6共混改性的影响

<正> 聚对苯二甲酰对苯二胺(PPTA)是一种棒状的刚性高分子,由它的液晶溶液可制得高强度、高模量、耐高温纤维,这种纤维可作为增强剂以制备高性能的复合材料。若将刚性链高分子以近于分子水平分散到柔性链高分子中,可期望得到性能良好的分子复合材     

THE RADIATION CROSSLINKING OF EPR/SBR BLEND

The radiation crosslinking of EPR/SBR blend has been studied. A relationship between sol fraction and radiation dose for the different weight ratio polymer blends and the method to calculate βb value of EPR/SBR blend system have been established.     

聚二甲基硅氧烷－氯磺化聚乙烯共混涂膜表面润湿性与表面结构的研究

研究了α，ω－二羟基聚二甲基硅氧烷（ＨＴＰＤＭＳ）－氯磺化聚乙烯（ＣＳＰ）非均相共混涂膜表面润湿性与表面结构的关系，发现膜表面疏水性随ＣＳＰ含量增加而出现突变点．ＸＰＳ分析证明，这是由于氯元素在表面含量呈突变性。阐明均一的疏水性共混涂膜形成的条件．     

NMR STUDY OF EXCHANGE KINETICS OF THE LITHIUM ION WITH CRYPTAND C222 IN BINARY ACETONITRILE-NITROMETHANE MIXTURES

Abstract

The exchange kinetics of the lithium ion with cryptand C222 were studied in acetonitrile-nitromethane mixtures by lithium-7 NMR line-shape analysis. In all solvent mixtures used, and over the entire temperature range studied, the chemical exchange of the Li⁺ ion between the solvated and complexed sites was found to occur via a bimolecular mechanism. The activation parameters E_a, δH?, δS? and δG? for the exchange have been determined. The free energy barrier for the exchange process appears to be nearly independent of the binary mixture composition. The results confirm the preferential solvation of the lithium ion with acetonitrile in the binary mixed solvent systems used.     

IONIC CONDUCTIVITY OF METHYLSILOXANE TERMINATED POLYETHYLENE OXIDE WITH LITHIUM PERCHLORATE NETWORK FILMS

Complex films of crosslinked poly(methylsiloxane-co-ethylene oxide) and lithium perchlorate were prepared. These solid state polymeric electrolytes show a markedly higher ionic conductivity, and excellent flexibility. The ionic conductivity of the network films closed to 10~(-5) Scm~(-1) at room temperature. The effects of Li~+ content, species and contents of crosslinking agents, molecular weight of poly(ethylene oxide) and temperature on the ionic conductivity of the network films were also investigated.     

聚醚聚酯嵌段共聚物共混物表面组成的ESCA研究

<正> 关于生物医用材料的微多相分离结构和适宜的亲、疏水性同它血液相容性间关系的研究已有不少文献报道。由于材料在使用时真正同血液相接触的只是材料的表面部分,因此材料的表面组成、结构和性质对它的血液相容性就具有更为直接的关系。对聚醚