改性热塑性聚氨酯耐热性提高的研究  

Research on polyurethane elastomer to improve heat resistance

作　　者：张敏[1] 张若琳[1] 张宝峰[1] 顾利民[2] 邱建辉 

机构地区：[1]陕西科技大学教育部轻化工助剂化学与技术重点实验室,陕西西安710021 [2]中国石油规划总院,北京100083 [3]日本秋田县立大学

出　　处：《陕西科技大学学报（自然科学版）》2013年第6期95-98,104,共5页Journal of Shaanxi University of Science & Technology

基　　金：国家自然科学基金项目(21144008);陕西科技大学博士科研启动基金项目(BJ09-08);陕西科技大学科研创新团队计划项目(TD10-01)

摘　　要：为了提高热塑性聚氨酯弹性体(TPU)的耐热性,采用三聚氰胺改性脲醛树脂包覆纳米TiO2(MUF/TiO2),并将其加入TPU中制成复合材料MUF/TiO2-TPU.采用FT-IR、WXRD、SEM、DSC、TGA等分别表征了复合材料的化学结构,并测定了其结晶度、热性能和力学性能.研究结果表明:MUF/TiO2的添加,TPU的结晶形态没有大的变化,但晶粒尺寸略有变小;耐热性得到了很大地提高;改性后的TPU断裂伸长率和拉伸强度呈现先增大后减少的趋势.In order to improve the heat resistance of thermoplastic polyurethane elastomer （TPU）, composite material MUF/TiO2 TPU was achieved by adding nano TiO2 powder （MUF/TiO2） which was coated by melamine modified urea-formaldehyde resin to the TPU. The chemical structure, crystallinity, thermal properties and mechanical properties of com- posite materials were characterized and determined by FT-IR, WXRD, SEM, DSC, TGA respectively. The results showed that the crystallization of TPU changed a little when MUF/ TiO2 was added. The grain size was slightly reduced, while the heat resistance was improved greatly. The elongation and tensile strength of modified TPU first increased and then de- creased.

关 键 词：TPU 三聚氰胺改性脲醛树脂 TIO2 耐热性 

分 类 号：O614[理学—无机化学]