Brush Architecture and Network Elasticity: Path to the Design of Mechanically Diverse Elastomers
Brush Architecture and Network Elasticity: Path to the Design of Mechanically Diverse Elastomers
复制标题
DOI：
10.1021/acs.macromol.2c00006
复制
发表时间：
2022-04-12
期刊：
影响因子：
5.5
通讯作者：
Sheiko, Sergei S.
中科院分区：
文献类型：
--
作者：
Maw, Mitchell;Morgan, Benjamin J.;Sheiko, Sergei S.
我们揭示了结构参数与刷状聚合物网络非线性弹性性能之间的普遍相关性。合成了具有不同侧链长度（类似于nsc）、接枝密度（类似于ng-1）和交联间主链聚合度（nx）的聚丙烯酸正丁酯、聚二甲基硅氧烷和聚异丁烯电刷网络。这使得实验验证了机械性能（剪切模量和应变硬化）、结构参数[nsc，ng，nx]和组合和瓶刷构象体系中原位小角度x射线散射的微观结构之间的理论标度关系。这些结果可作为机械多样性无溶剂弹性材料可编程设计的基础
We unveil universal correlations between architectural parameters and nonlinear elastic properties of brush polymer networks. A comprehensive library of poly(n-butyl acrylate), poly(dimethylsiloxane), and polyisobutylene brush networks was synthesized with systematically varied side chain length (similar to nsc), grafting density(similar to ng-1), and backbone degree of polymerization between cross-links (nx). This allowed experimental verification of theoretical scaling relationships between mechanical properties (shear modulus and strain-stiffening), architectural parameters[nsc,ng,nx], and microstructure from in situ small-angle X-ray scattering in both comband bottlebrush conformational regimes. These results can be used as a foundation for the programmable design of mechanically diverse solvent-free elastic materials