Synthesis and Characterization of Polyurethanes Based on Hydroxylated Tung Oil (HTO) and PAPI

[摘要] Two novel polyurethane films were successfully synthesized. One was from hydroxylated tung oil (HTO) and polymethylene polyphenyl isocyanate (PAPI), which was designated as HTO-PAPI; and the other was from HTO end-capped a traditional polyurethane prepolymer and PAPI, which was designated as PP-HTO-PAPI. FTIR and NMR results show that the prepared HTO-PAPI and PP-HTO-PAPI are the expected structures. Mechanical testing result shows that the Young's modulus and elongation at break for HTO-PAPI and PP-HTO-PAPI are 282.13 MPa, 1.8 MPa and 14.15%, 218.23%, respectively, indicating that the two polyurethane films have very distinctive properties. And the properties can be controlled by incorporating different ratio of HTO and prepolymer. The present work provides a good foundation for the synthesis of novel polyurethane adhesives that will be hopefully used in different applications.

[发布机构] School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, China^1;High and New Technology Research Center, Henan Academy of Sciences, Zhengzhou, China^2

[效力级别] 机械制造 [学科分类] 材料科学（综合）

[关键词] Elongation at break;PAPI;Polymethylene;Polyurethane adhesives;Polyurethane films;Polyurethane prepolymers;Synthesis and characterizations;Tung oil