Transparent and High Refractive Index Thermoplastic Polymer Glasses Using Evaporative Ligand Exchange of Hybrid Particle Fillers
Transparent and High Refractive Index Thermoplastic Polymer Glasses Using Evaporative Ligand Exchange of Hybrid Particle Fillers
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DOI：
10.1021/acsami.6b12666
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发表时间：
2017-03-01
影响因子：
9.5
通讯作者：
Bockstaller, Michael R.
中科院分区：
文献类型：
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作者：
Wang, Zongyu;Lu, Zhao;Bockstaller, Michael R.
在商品聚合物热塑性塑料的基础上开发高折射率玻璃是进一步推进从节能照明到低成本光子学等技术的重要条件。这一贡献提出了一种新的粒子分散策略，可以使氧化锌（ZnO）粒子在聚甲基丙烯酸甲酯（PMMA）基体中均匀分散，从而实现无机含量超过重量25%、光学透明度超过0.8/mm、可见光范围内折射率大于1.64的混合玻璃。该方法基于蒸发配体交换法合成聚苯乙烯-丙烯腈(PSAN)-系链氧化锌（ZnO）颗粒填料。有利的填料基质相互作用表明，能够合成具有高分子PMMA的同构共混物，与原始PMMA基质相比，表现出更好的热机械稳定性。通过对热塑性商品聚合物的改性，在聚合物玻璃中同时实现高折射率和光学透明度，可以在高成本或对热机械稳定性和/或抗紫外线性要求高的应用中，为昂贵的特种聚合物提供可行的替代方案。
Development of high refractive index glasses on the basis of commodity polymer thermoplastics presents an important requisite to further advancement of technologies ranging from energy efficient lighting to cost efficient photonics. This contribution presents a novel particle dispersion strategy that enables uniform dispersion of zinc oxide (ZnO) particles in a poly(methyl methacrylate) (PMMA) matrix to facilitate hybrid glasses with inorganic content exceeding 25% by weight, optical transparency in excess of 0.8/mm, and a refractive index greater than 1.64 in the visible wavelength range. The method is based on the application of evaporative ligand exchange to synthesize poly(styrene-r-acrylonitrile) (PSAN)-tethered zinc oxide (ZnO) particle fillers. Favorable filler matrix interactions are shown to enable the synthesis of isomorphous blends with high molecular PMMA that exhibit improved thermomechanical stability compared to that of the pristine PMMA matrix. The concurrent realization of high refractive index and optical transparency in polymer glasses by modification of a thermoplastic commodity polymer could present a viable alternative to expensive specialty polymers in applications where high costs or demands for thermomechanical stability and/or UV resistance prohibit the application of specialty polymer solutions.