高等学校化学学报 ›› 2017, Vol. 38 ›› Issue (8): 1470-1476.doi: 10.7503/cjcu20170102

• 高分子化学 • 上一篇    下一篇

剪切场下两亲性棒状粒子对聚异丁烯/聚二甲基硅氧烷共混物相形态的影响

叶莉莎亚, 黄亚江, 孔米秋, 娄方丽, 杨其, 李光宪   

  1. 四川大学高分子科学与工程学院, 高分子材料与工程国家重点实验室, 成都 610065
  • 收稿日期:2017-02-22 修回日期:2017-07-05 出版日期:2017-08-10 发布日期:2017-07-05
  • 通讯作者: 黄亚江,男,博士,教授,博士生导师,主要从事聚合物共混结构及性能研究.E-mail:hyj@scu.edu.cn;李光宪,男,博士,教授,博士生导师,主要从事多组分高分子相行为研究.E-mail:guangxianli@scu.edu.cn E-mail:hyj@scu.edu.cn;guangxianli@scu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:51373109,51421061)和四川省科技厅青年基金(批准号:2015JQ0012)资助.

Effect of Amphiphilic Silica Rods on the Morphology of Immiscible Polyisobutylene/Polydimethylsiloxane Blends Under Simple Shear Flow

YE Lishaya, HUANG Yajiang, KONG Miqiu, LOU Fangli, YANG Qi, LI Guangxian   

  1. College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering of China, Sichuan University, Chengdu 610065, China
  • Received:2017-02-22 Revised:2017-07-05 Online:2017-08-10 Published:2017-07-05
  • Supported by:

    Supported by the National Natural Science Foundation of China(Nos.51373109, 51421061) and the Sichuan Youth Science and Technology Foundation, China(No.2015JQ0012).

摘要:

合成了具有两亲表面性质的棒状SiO2粒子,借助共聚焦激光扫描显微镜研究了两亲性棒状SiO2粒子在共混物中的选择性分布,并通过在线剪切-显微技术和流变技术研究了其对聚异丁烯/聚二甲基硅氧烷(PIB/PDMS)不相容共混物形态结构的影响.研究表明,两亲性棒状SiO2粒子倾向于分布在两相界面处及PIB相中.分散相的剪切诱导凝聚行为强烈依赖于粒子的含量和共混物的组成比.少量两亲性SiO2粒子会促进分散相的凝聚,而加入足够量的粒子则能抑制分散相凝聚.

关键词: 不相容聚异丁烯/聚二甲基硅氧烷共混物, 剪切场, 两亲性棒状SiO2粒子

Abstract:

Silica rods with amphiphilic surface properties were synthesized and their effects on the morphology of immiscible polyisobutylene(PIB)/polydimethylsiloxane(PDMS) blends were investigated via online flow-visualization technique and rheology. Confocal laser scanning microscopy revealed that amphiphilic silica rods tended to distribute at the interface and within the PIB phase. In addition, the flow-induced coalescence behavior of droplets was found to strongly depend on the particle content and the blending composition ratio. The addition of a small amount of amphiphilic silica rods could promote the coalescence of droplets, while coalescence was suppressed effectively at high particle loadings.

Key words: Immiscible polyisobutylene/polydimethylsiloxane blend, Shear flow, Amphiphilic silica rod

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