高分子纳米复合材料的结构与流变行为研究
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- 英文论文题名：Structure and Rheology of Polymer Nanocomposites
- 论文作者：尤伟 ; 俞炜
- 英文论文作者：Wei You ; Wei Yu ; School of Chemistry and Chemical Engineering ; Shanghai Jiao Tong University
- 年：2016
- 作者机构：上海交通大学化学化工学院;
- 论文关键词：纳米复合材料 ; 线性粘弹性 ; 受限扩散
- 会议召开时间：2016-08-25
- 会议录名称：中国化学会2016年软物质理论计算与模拟会议论文摘要集
- 语种：中文
- 分类号：TB332
- 学会代码：ZGHY
- 会议名称：中国化学会2016年软物质理论计算与模拟会议
- 会议地点：中国天津
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：103k
- 原文格式：D
- 会议级别：全国
摘要
纳米粒子被广泛应用于聚合物中来提高聚合物的机械性能。在熔体条件下,通常观察到在所有频率下纳米复合材料的动态模量都高于聚合物基体的,而在低频区域的模量升高又往往高于高频区域的,并且储能模量的增加又高于损耗模量的增加。该现象与聚合物的种类无关,并且与粒子的形状与种类无关。虽然有很多理论工作尝试来解释这种行为,但如何定量描述该现象仍然是一个巨大的挑战。在本工作中,我们将研究一系列聚合物纳米复合材料的线性粘弹性。我们将利用两相模型来描述纳米复合材料的线性粘弹性行为,其中流体力学贡献与粒子-聚合物相互作用和粒子团聚的状态有关,而粒子的贡献将从粒子在两个网络结构中受限扩散得到。我们的结果能够清晰地表明粒子分散状态、粒子表面化学性质等因素对纳米复合材料线性粘弹性的影响。
Nanoparticles has become a popular filler to improve the mechanical properties of polymers.Several observation have been made for polymer nanocomposites,such as enhanced dynamic moduli at all frequency range although the enhancement at low frequency is more significant than that at high frequency,and the enhancement in the storage modulus is much larger than that in the loss modulus.These features seem independent of the type of polymer matrix,the type of particles and the shape of particles.However,a clear and quantitative understanding of such phenomenon is still a big challenge.In this work,we will study the linear viscoelasticity of a series of polymer nanocomposites.The effect of particle size,particle surface chemistry,and particle-polymer interactions will be investigated under a new theoretical framework,where the apparent hydrodynamic contribution accounts for the confining effect due to the particle-polymer interaction and aggregation of particles,and the particle contributions are explained from the confining-escaping motion of particles in dual networks from polymer chains and particles network.Our results demonstrate clearly the connections between the dispersion state and the linear viscoelasticity of polymer nanocomposites.
Nanoparticles has become a popular filler to improve the mechanical properties of polymers.Several observation have been made for polymer nanocomposites,such as enhanced dynamic moduli at all frequency range although the enhancement at low frequency is more significant than that at high frequency,and the enhancement in the storage modulus is much larger than that in the loss modulus.These features seem independent of the type of polymer matrix,the type of particles and the shape of particles.However,a clear and quantitative understanding of such phenomenon is still a big challenge.In this work,we will study the linear viscoelasticity of a series of polymer nanocomposites.The effect of particle size,particle surface chemistry,and particle-polymer interactions will be investigated under a new theoretical framework,where the apparent hydrodynamic contribution accounts for the confining effect due to the particle-polymer interaction and aggregation of particles,and the particle contributions are explained from the confining-escaping motion of particles in dual networks from polymer chains and particles network.Our results demonstrate clearly the connections between the dispersion state and the linear viscoelasticity of polymer nanocomposites.
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