文献类型：期刊文献

英文题名：Thermodynamic phase analysis of acrylic polymer/hindered phenol hybrids: Effects of hydrogen bonding strength

作者：Shi, Gaopeng[1];Yin, Xiaotong[1];Wu, Guozhang[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Shanghai 200237, Peoples R China

年份：2018

卷号：153

起止页码：317

外文期刊名：POLYMER

收录：;EI(收录号：20183905870244);WOS:【SCI-EXPANDED(收录号:WOS:000445783300035)】；

基金：This research was supported by the"973" project (grant number 2013CB035505) and the National Natural Science Foundation of China (grant number 51373053).

语种：英文

外文关键词：Flory-Huggins interaction; Spinodal decomposition; Hydrogen bonding; Phenol; Acrylic resin

摘要：Hindered phenols have been reported effective to remarkably enhance the damping property of acrylic polymers. In this work, the long-term stability of these novel damping materials were investigated on the basis of thermodynamic phase diagrams. The Flory-Huggins interaction parameter. between different small molecules and poly(butyl methacrylate) (PBMA) were determined through the melting point depression method proposed by Nishi and Wang. The calculated phase diagram curves agreed well with small-angle light scattering, wide-angle X-ray diffraction, and optical transparency measurements.. gradually decreased to a negative value as temperature increased and the phase diagrams exhbited an upper critical solution temperature-type spinodal curve. The mixtures with the small-molecule loading of less than 28 vol% were found miscibile at temperatures near the glass-transition temperature. Increasing the intermolecular hydrogen bonding strength between the phenol and carbonyl groups of PBMA could effectively reduce the. value. Meanwhile, increasing the steric hindrance of the phenolic hydroxyl groups and the sizes of small molecules may sufficiently weaken intramolecular hydrogen bonding interactions. These effects suppress the self-aggregation of small molecules and improve the long-term stability of the damping materials.