文献类型：期刊文献

英文题名：Cross-Linked Fluorinated Polyurethanes against Chemical Warfare Agent Simulants: Properties Affected by the Structure of Diisocyanate

作者：Chen, Xucong[1,2];Li, Xue[1,3];Zhang, Huijuan[4,5];Li, Hong[1];Wang, Guiyou[2];Cui, Yan[4]

机构：[1]Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai Key Lab Elect Insulat & Thermal Aging, Shanghai 200240, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Shanghai 200237, Peoples R China;[3]Shanghai Univ Elect Power, Shanghai Key Lab Mat Protect & Adv Mat Elect Power, Shanghai 200090, Peoples R China;[4]State Key Lab NBC Protect Civilian, Beijing 102205, Peoples R China;[5]Inner Mongolia Univ Technol, Sch Chem Engn, Hohhot 010050, Peoples R China

年份：2023

卷号：56

期号：21

起止页码：8993

外文期刊名：MACROMOLECULES

收录：;EI(收录号：20234815119698);WOS:【SCI-EXPANDED(收录号:WOS:001105115800001)】；

基金：We appreciate the financial support provided by National Key R&D Program of China ( Nos. 2020YFB1505500 and 2020YFB1505502). We gratefully acknowledge funding for this work provided by Preresearch Project 30110020402. The authors thank Biolin Scientific for QCM-D measurements and University of Science and Technology of China for PALS measurements.

语种：英文

外文关键词：Aromatic compounds - Chemical warfare - Crosslinking - Esters - Glass transition - Microphase separation - Structural properties - Sulfur compounds

摘要：Tuning polyurethane (PU) properties by changing isocyanate monomers is interesting. However, the relationship between the diisocyanate structure and the protective properties of PUs remains unclear. In this paper, two-component cross-linked PUs were synthesized from two aromatic diisocyanates, one linear aliphatic diisocyanate and one alicyclic diisocyanate with the same fluorinated polyacrylate copolymer, and the effects of diisocyanate structure on the adsorption and permeation behaviors of dimethyl methylphosphonate (DMMP, a nerve agent simulant) and 2-chloroethyl ethyl sulfide (CEES, a mustard simulant) were investigated. It was found that for the same PU, the retention of DMMP was greater than that of CEES, but on the contrary, the diffusion coefficient of DMMP was less than that of CEES. For the different PUs, the structure of diisocyanate had a great effect on the protective properties of the PUs. Compared with the aromatic PU and the linear aliphatic PU, the alicyclic PU has the lowest surface adsorption capacity and internal retention of DMMP and CEES, which should be due to its much higher glass transition temperature (T-g), weaker intermolecular interaction with DMMP or CEES, smaller free volume pores, lower degree of microphase separation, and higher surficial fluorine content. Therefore, the alicyclic PU may be the best candidate as a protective topcoat PU material.