细乳液聚合制备接枝纳米粒子及其在聚合物基体中的空间分布调控

刘朗萍; 林宇; 管爱国; 吴国章

doi:10.11777/j.issn1000-3304.2016.16081

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细乳液聚合制备接枝纳米粒子及其在聚合物基体中的空间分布调控

研究论文 | 更新时间：2021-03-19

- 细乳液聚合制备接枝纳米粒子及其在聚合物基体中的空间分布调控
- Tuning Spatial Distribution of Polystyrene-grafted Silica Nanoparticles in Different Polymer Matrices
- 高分子学报 2016年第11期页码：1546-1554
- 作者机构：
  
  华东理工大学材料科学与工程学院上海市先进聚合物重点实验室上海 200237
- 作者简介：
  
  林宇,E-mail:linyu@ecust.edu.cn Yu Lin,E-mail:linyu@ecust.edu.cn
  吴国章,E-mail:wgz@ecust.edu.cn Guo-zhang Wu,E-mail:wgz@ecust.edu.cn
- 基金信息：
  
  国家自然科学基金(51503066);国家自然科学基金(20974033);中央高校基本科研业务费(22A201514004)
- DOI：10.11777/j.issn1000-3304.2016.16081
  中图分类号：
- 纸质出版日期：2016-11，
  
  收稿日期：2016-3-15，
  
  修回日期：2016-4-20，
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刘朗萍, 林宇, 管爱国, 吴国章. 细乳液聚合制备接枝纳米粒子及其在聚合物基体中的空间分布调控[J]. 高分子学报, 2016,(11):1546-1554.

Lang-ping Liu, Yu Lin, Ai-guo Guan, Guo-zhang Wu. Tuning Spatial Distribution of Polystyrene-grafted Silica Nanoparticles in Different Polymer Matrices[J]. Acta Polymerica Sinica, 2016,(11):1546-1554.
刘朗萍, 林宇, 管爱国, 吴国章. 细乳液聚合制备接枝纳米粒子及其在聚合物基体中的空间分布调控[J]. 高分子学报, 2016,(11):1546-1554. DOI： 10.11777/j.issn1000-3304.2016.16081.

Lang-ping Liu, Yu Lin, Ai-guo Guan, Guo-zhang Wu. Tuning Spatial Distribution of Polystyrene-grafted Silica Nanoparticles in Different Polymer Matrices[J]. Acta Polymerica Sinica, 2016,(11):1546-1554. DOI： 10.11777/j.issn1000-3304.2016.16081.

摘要

采用细乳液聚合制备了不同接枝链长度和密度的聚苯乙烯接枝二氧化硅纳米复合粒子(SiO

-PS).利用傅里叶红外光谱(FTIR)、透射电子显微镜(TEM)、示差扫描量热(DSC)、热失重(TGA)与凝胶渗透色谱仪(GPC)考察了SiO

-PS粒子接枝结构特征.采用TEM研究了接枝链聚合度(

)和接枝密度(

)对SiO

-PS填充PS体系纳米粒子空间分布的影响规律.结果显示，

基本不变，

越高，纳米粒子越易均匀分散；而接枝链过长易使长链相互缠结，起到反浸润作用，粒子聚集，不利于均匀分散.纳米粒子热力学稳定分散状态仅与

、

有关，与粒径无关.通过调控

和

可得到特定的纳米粒子分散形貌.对比考察了SiO

-PS填充聚甲基丙烯酸甲酯(PMMA)体系结果，揭示了接枝链与基体分子链相容性对纳米粒子空间分布的贡献.

Abstract

A recurring challenge in the field of polymer nanocomposites (PNCs) is to control the spatial distribution of nanoparticles (NPs) throughout a polymer matrix and thereby optimize the desired macroscopic performance of PNCs.In this study

polystyrene-grafted silica (SiO

-PS) NPs with different grafted chain length and grafting density were prepared

via

miniemulsion polymerization.The grafted structure of SiO

-PS NPs was characterized

via

combination of Fourier transform infrared spectroscopy (FTIR)

transmission electron microscopy (TEM)

differential scanning calorimeter (DSC)

thermogravimetric analysis (TGA) and gel permeation chromatography (GPC).The core-shell structure of SiO

-PS NPs that consisted of different polymerization degrees of grafted chains (

) and grafting density (

) can be synthesized by tuning various reaction conditions.The effect of

and

on spatial distribution of SiO

-PS NP filled PS matrix was investigated by TEM observation.The results reveal that tunable specific spatial distribution of grafted NPs can be obtained through the control of

and

.In the case of that

is basically the same

grafted particles with higher

are miscible with PS matrix chains

leading to more homogeneous dispersion of NPs.While when

is very high for grafted NPs with roughly the same

the grafted chains and the matrix chains are dewetting between each other

which is not effective for uniform dispersion.The thermodynamics stable state of NP distribution is merely related to

and

and independent of the particle size.Furthermore

by comparing the results of SiO

-PS NP filled PS and polymethyl methacrylate (PMMA) matrices

the contribution of the chemical structure differences and compatibility between grafted chains and matrix chains on spatial distribution of NPs are also discussed.The phase separation behavior between the PMMA matrix and grafted PS chains makes a great difference to the spatial distribution of the grafted NPs.

关键词

接枝粒子空间分布接枝链聚合度接枝密度相容性

Keywords

Grafted nanoparticleSpatial distributionPolymerization degree of grafted chainsGrafting densityCompatibility

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