酸性水性聚氨分散物的合成,形态和颗粒大小控制
Ellen J Quane1, Niels Elders2, Anna S Newman1
1School of Mathematical and Physical Sciences, The University of Sheffield, Dainton Building, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K.
Macromolecules
|December 2, 2024
概括
电荷稳定水性聚氨 (PU) 分散物自组装成粒子和超分子结构. 颗粒大小由水友含量控制,随着PU酸度的增加而下降,并受到聚乙烯软片段分子量的影响.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 表面化学 表面化学
背景情况:
- 水性聚氨 (PU) 分散是一种具有调节性质的多功能材料.
- 了解PU链的自组装行为对于控制分散特征至关重要.
研究的目的:
- 为了合成和描述充电稳定水性PU分散物.
- 为了研究PU组成,自组装和颗粒特征之间的关系.
主要方法:
- 合成不同成分的PU分散物.
- 使用质谱学,GPC,SAXS,AFM和FTIR进行表征.
- 用质量保存模型分析散射数据.
主要成果:
- 聚烯分散形成球形粒子和超分子结构.
- 超分子结构的比例随着二甲基烯酸 (DMPA) 含量的增加而增加.
- 根据表面电荷密度模型,随着PU酸度的增加,粒子半径会减少.
结论:
- 聚乙烯颗粒大小由水 (DMPA) 含量和聚乙烯软段分子量来决定.
- 对于粒子稳定,需要一个关键的水友覆盖面,随着聚的分子量增加而增加.
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