Li Jihui, Li Yongshen, Song Yunna, Niu Shuai, Li Ning
College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang 050024, PR China.
College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang 050024, PR China.
Ultrason Sonochem. 2017 Nov;39:853-862. doi: 10.1016/j.ultsonch.2017.06.017. Epub 2017 Jun 20.
In this paper, polyvinyl alcohol/phytic acid polymer (PVA/PA polymer) was synthesized through esterification reaction of PVA and PA in the case of acidity and ultrasound irradiation and characterized, and PVA/PA polymer film was prepared by PVA/PA polymer and characterized, and the influence of dosage of PA on the thermal stability, mechanical properties and surface resistivity of PVA/PA polymer film were researched, and the influence of sonication time on the mechanical properties of PVA/PA polymer film was investigated. Based on those, it was concluded that the hydroxyl group on the chain of PVA and the phosphonic group on PA were connected together in the form of phosphonate bond, and the hydroxyl group on the chain of PVA were connected together in the form of ether bond after the intermolecular dehydration; in the meantime, it was also confirmed that PVA/PA polymer film prepared from 1.20mL of PA not only had the high thermal stability and favorable ductility but also the low surface resistivity in comparison with PVA/PA polymer film with 0.00mL of PA, and the ductility of PVA/PA polymer film was very sensitive to the sonication time.
本文通过聚乙烯醇（PVA）与植酸（PA）在酸性条件及超声辐照下的酯化反应合成了聚乙烯醇/植酸聚合物（PVA/PA聚合物）并进行了表征，用PVA/PA聚合物制备了PVA/PA聚合物薄膜并进行了表征，研究了PA用量对PVA/PA聚合物薄膜热稳定性、力学性能及表面电阻率的影响，考察了超声处理时间对PVA/PA聚合物薄膜力学性能的影响。基于此得出，PVA链上的羟基与PA上的膦酸基团以膦酸酯键的形式连接在一起，分子间脱水后PVA链上的羟基以醚键的形式连接在一起；同时还证实，与PA用量为0.00mL的PVA/PA聚合物薄膜相比，由1.20mL PA制备的PVA/PA聚合物薄膜不仅具有高的热稳定性和良好的延展性，而且具有较低的表面电阻率，并且PVA/PA聚合物薄膜的延展性对超声处理时间非常敏感。
