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聚甲基丙烯酸甲酯/聚（苯乙烯-马来酸酐）在中空二氧化硅纳米管存在下的相分离行为

Phase separation behavior of poly(methyl methacrylate)/poly(styrene--maleic anhydride) in the presence of hollow silica nanotubes.

作者信息

Lv Xiong, Zuo Min, Zhang Haimo, Zhao An, Zhu Weipu, Zheng Qiang

机构信息

MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Ministry of Education, Department of Polymer Science and Engineering, Zhejiang University Hangzhou 310027 China

出版信息

RSC Adv. 2018 Dec 5;8(71):40701-40711. doi: 10.1039/c8ra07679k. eCollection 2018 Dec 4.

DOI:10.1039/c8ra07679k
PMID:35557897
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9091413/
Abstract

The phase separation behavior of poly(methyl methacrylate) (PMMA)/poly(styrene--maleic anhydride) (SMA) blends with and without one-dimensional hollow silica nanotubes (HSNTs) was investigated using time-resolved small-angle laser light scattering. During isothermal annealing over a range of 100 °C above the glass transition temperature, the Arrhenius equation is applicable to describe the temperature dependence of phase separation behavior at the early and late stages of spinodal decomposition (SD) for unfilled and filled PMMA/SMA systems. The mechanical barrier effect of HSNTs on the macromolecular chain diffusion of the blend matrix may retard the concentration fluctuation at the early stage and slow down the domain coarsening at the late stage of SD phase separation for the blend matrix to result in the decrease of apparent diffusion coefficient , the postponement of the relaxation time and the decline of temperature sensitivity for the phase separation rate.

摘要

使用时间分辨小角激光光散射研究了含有和不含有一维中空二氧化硅纳米管（HSNTs）的聚甲基丙烯酸甲酯（PMMA）/聚（苯乙烯-马来酸酐）（SMA）共混物的相分离行为。在高于玻璃化转变温度100°C的范围内进行等温退火时，阿累尼乌斯方程适用于描述未填充和填充的PMMA/SMA体系在旋节线分解（SD）早期和晚期相分离行为的温度依赖性。HSNTs对共混物基体大分子链扩散的机械阻挡作用可能会在SD相分离的早期抑制浓度波动，并在晚期减缓畴粗化，从而导致共混物基体的表观扩散系数降低、弛豫时间延迟以及相分离速率的温度敏感性下降。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1da/9091413/e6e4732f3a46/c8ra07679k-f12.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1da/9091413/4a67e299adc9/c8ra07679k-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1da/9091413/5491af69311b/c8ra07679k-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1da/9091413/a563e950e042/c8ra07679k-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1da/9091413/de1cfdd12bea/c8ra07679k-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1da/9091413/21ffb181d8a8/c8ra07679k-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1da/9091413/2d5847bb9cd2/c8ra07679k-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1da/9091413/794c8c548ae4/c8ra07679k-f10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1da/9091413/55a144526e1b/c8ra07679k-f11.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1da/9091413/e6e4732f3a46/c8ra07679k-f12.jpg

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