Brush‐First ROMP of poly(ethylene oxide) macromonomers of varied length: impact of polymer architecture on thermal behavior and Li
<sup>+</sup>
conductivity
作者:Yoshiki Shibuya、Ryoichi Tatara、Yivan Jiang、Yang Shao‐Horn、Jeremiah A. Johnson
DOI:10.1002/pola.29242
日期:2019.2
The properties of polymeric materials are dictated not only by their composition but also by their molecular architecture. Here, by employing brush‐first ring‐opening metathesis polymerization (ROMP), norbornene‐terminated poly(ethylene oxide) (PEO) macromonomers (MM‐n, linear architecture), bottlebrush polymers (Brush‐n, comb architecture), and brush‐arm star polymers (BASP‐n, star architecture),
聚合材料的性能不仅取决于其组成,而且取决于其分子结构。在这里,通过首先使用刷开环复分解聚合(ROMP),降冰片烯封端的聚环氧乙烷(PEO)大单体(MM-n,线性结构),洗瓶刷聚合物(Brush-n,梳状结构)和刷合成了臂星形聚合物(BASP-n,星形结构),其中n表示PEO的平均聚合度(DP)。架构对热性质和Li +的影响研究了该系列PEO体系结构的电导率。值得注意的是,在具有最高聚合度的PEO的聚合物中,无论结构和分子量的差异(相差约100倍),以双(三氟甲磺酰基)酰亚胺锂(LiTFSI)作为Li +源的电解质均具有标准化的离子电导率(σ ñ)仅4.9倍差之内(σ ñ = 29.8×10 -5小号厘米-1为MM-45和σ ñ = 6.07×10 -5小号厘米-1为BASP-45)以Li的浓度+ ř = [李+ ] / [EO] = 50°C时的1/12。©2018 Wiley Periodicals,Inc