介质体长度对聚合甲基酸粘性液晶的热扩散率的影响
Takeshi Saito1, Shoki Tomizawa1, Nawalage Florence Cooray1
1Department of Chemical Science and Engineering, Institute of Science Tokyo, Ookayama, Meguro, Tokyo 152-8550, Japan.
The journal of physical chemistry. B
|May 6, 2025
概括
液晶 (LC) 聚合物的热扩散性取决于分子方向. 在PnPhEBp中较长的中位素增强了分子秩序 (S),而不是热扩散性 (α).
科学领域:
- 聚合物科学 聚合物科学
- 材料科学 材料科学 材料科学
- 液晶是一种液晶.
背景情况:
- 侧链液晶 (LC) 聚合物表现出独特的热和方向性质.
- 了解LC聚合物中的热扩散率 (α) 对于它们在先进材料中的应用至关重要.
- 分子结构,液晶相和热传输之间的关系尚未完全阐明.
研究的目的:
- 为了研究PnPhEBp聚合甲酸盐的热扩散率 (α),其甲间距长度各不相同.
- 为了将热扩散度与LC方向 (顺序参数,S) 和特定LC相 (SmA,SmB) 的程度相关联.
- 为了比较PnPhEBp与其他LC聚合甲基酸盐的热特性.
主要方法:
- 合成PnPhEBp聚合甲基烯酸与4-双乙酸 mesogenic 单元和n-甲基烯间隔剂.
- 测量热扩散率平行 (α) 和垂直 (α) 到LC导体.
- 使用顺序参数 (S) 来量化LC方向.
主要成果:
- 一个单元对象与顺序参数 (S) 呈正相关性,表明沿着导体的热传输增加,方向更高.
- α保持不变,独立于S和特定的涂抹相 (SmA或SmB).
- 在PnPhEBp中较长的中位子增强了顺序参数 (S),但与在相似的S中较短的中位子的LC相比,导致较低的α
结论:
- 与PnPhEBp中的导演平行的热扩散性受到分子导向的强烈影响.
- 垂直于涂层的热传输对顺序和相位类型的程度不敏感.
- 较长的半导体单位在增加分子秩序方面更有效,而不是在提高这些LC聚合物的热扩散性.
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