Balancing Optical Property and Enhancing Stability for High-Refractive Index Polythiourethane with Assistance of Cubic Thiol-Functionalized Silsesquioxanes,ACS Applied Polymer Materials

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Balancing Optical Property and Enhancing Stability for High-Refractive Index Polythiourethane with Assistance of Cubic Thiol-Functionalized Silsesquioxanes
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2020-12-04 , DOI: 10.1021/acsapm.0c00917
Yuanyu Chen _{1,

2} , Zongyi Qin ₁ , Guofeng Tang ₂ , Lijun Wei ₂ , Houlin Du ₂ , Weiping Du ₂

Affiliation

To achieve a better balance between the refractive index and Abbe number, the thiol-functionalized polyhedral oligomeric silsesquioxane (POSS–SH) was incorporated as both nanoreinforcement and cross-linking reagent into high-refractive index polythiourethane (PTU). The influences of the POSS–SH on the microstructures and properties of PTU were investigated. It is found that all the nanocomposites exhibited a dense network structure and high structural homogeneity even at the POSS–SH loading up to 10 wt %. Besides great improvements in the thermal stability and mechanical property, the nanocomposite containing 1.5 wt % POSS–SH revealed a slight reduction in the refractive index from 1.6568 for neat PTU to 1.6557 but a significant increase in the Abbe number from 28 to 35, accompanied by excellent optical transparency. These results indicate that the covalent incorporation of bifunctional POSS–SH into the PTU network will be helpful for the rational design of advanced optical and optoelectronic materials.

中文翻译：

在立方硫醇官能化倍半硅氧烷的辅助下平衡高折射率聚硫氨酯的光学性能和稳定性

为了在折射率和阿贝数之间取得更好的平衡，将巯基官能化的多面体低聚倍半硅氧烷（POSS–SH）作为纳米增强剂和交联剂加入了高折射率聚硫氨酯（PTU）中。研究了POSS–SH对PTU的组织和性能的影响。发现即使在POSS–SH含量高达10 wt％的情况下，所有纳米复合材料也显示出致密的网络结构和高结构均匀性。除了在热稳定性和机械性能方面有显着改善外，含有1.5 wt％POSS-SH的纳米复合材料还显示出折射率从纯PTU的1.6568轻微降低至1.6557，但阿贝数从28显着增加至35，同时伴随着极好的光学透明度。

更新日期：2021-01-08

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