文献类型：期刊文献

英文题名：Preparation and properties of siloxane modified polyurea materials

作者：Qiu, Wei Yu, Siwu Liu, Ying Li, Bo Yang, Liutao

第一作者：Qiu, Wei

通信作者：Qiu, W[1];Yang, LT[2]

机构：[1]Guizhou Inst Technol, Sch Chem Engn, 1 Boshi Rd, Guiyang 550003, Peoples R China;[2]Guizhou Univ, Collaborat Innovat Ctr Guizhou Prov Efficient Util, Guiyang, Peoples R China;[3]Guizhou Power Grid Co, Elect Power Res Inst, Guiyang, Peoples R China;[4]Guizhou Police Coll, Theoret Educ & Training Dept, 175 Jianlongdong Rd, Guiyang 550005, Peoples R China

第一机构：贵州理工学院化学工程学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Chem Engn, 1 Boshi Rd, Guiyang 550003, Peoples R China;corresponding author), Guizhou Police Coll, Theoret Educ & Training Dept, 175 Jianlongdong Rd, Guiyang 550005, Peoples R China.|贵州理工学院化学工程学院;贵州理工学院;

年份：2025

外文期刊名：JOURNAL OF ELASTOMERS AND PLASTICS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001518395000001)】；

基金：The author(s) disclosed receipt of the following financial support for the research, authorship, and/orpublication of this article: This work is financially supported by the Guizhou Science and Technology Support Project (No. Qiankehe Zhicheng [2017]2817, and [2018]2835), the Startup Foundation for Advanced Talents of Guizhou Institute of Technology (No: XJGC20190646), Key laboratory of energy chemistry in guizhou universities (No. Qian Jiao Ji [2022]035), the Science and technology project of China Southern Power Grid Co., Ltd. (Grant No. GZKJXM20191302), and the Natural science Research project of the Education Department of Guizhou Province (No. QJJ[2022]001).

语种：英文

外文关键词：polyurea; siloxane; modification; properties

摘要：This work aimed to enhance polyurea's mechanical properties, water resistance, and substrate adhesion through siloxane modification. Amino-terminated polyurea prepolymer was synthesized from hexamethylene diisocyanate (HDI) and polyaspartic acid ester resin F420, then modified with 3-aminopropyl-methyl-diethoxysilane (KH902) under optimized conditions (12-min prepolymerization; 4.35 wt% KH902). Structural and performance characterization via FTIR confirmed Si-O-Si integration (1050 cm-1 peak), while mechanical testing revealed exceptional tensile strength (54.75 MPa) and elongation (28.81%). The modified polyurea exhibited outstanding water resistance (1.52% absorption after 7 days; 95.87% tensile/94.94% elongation retention) and enhanced cement mortar adhesion (4.5 MPa). Thermal stability improved significantly, with TGA showing delayed degradation onset. These results demonstrate KH902-modified polyurea's potential for demanding applications like infrastructure reinforcement.