具有连续聚合物相结构的生物基聚氨青粘合剂:在控制热力学性能和相形态学方面,异酸盐指数的关键作用
Haocheng Yang1, Suzhou Cao1, Chengwei Wu1
1MOE Key Laboratory of High Performance Polymer Materials and Technology, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.
Molecules (Basel, Switzerland)
|June 13, 2025
概括
这项研究引入了一种新的生物基聚氨青粘合剂 (PUAB),具有高PU矩阵,提高了路面性能和可持续性. 优化的PUAB提供了改进的机械性能和更长的施工窗口,为环保基础设施铺平了道路.
科学领域:
- 铺路工程 铺路工程 铺路工程
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
背景情况:
- 传统的聚氨青 (PUA) 由于低PU度和不可再生材料而存在限制.
- 这导致路面工程中的机械性能差以及环境问题.
研究的目的:
- 开发一个环保,成本效益高的生物基PUA粘合剂 (PUAB),具有高生物质PU矩阵 (>70%) 和高含量 (60%).
- 调查异酸盐指数 (NCO/OH比) 对PUAB特性的影响.
主要方法:
- 里埃变换红外光谱法中的红外光谱学.
- 动态机械分析 动态机械分析
- 激光扫描共聚焦显微镜.
- 拉力测试 拉力测试 拉力测试
- 旋转粘度测量方法 旋转粘度测量方法
主要成果:
- 较高的异酸盐指数增加了旋转粘度,但延长了施工时间 (>60分钟在120°C达到1Pa·s).
- 增加的NCO/OH比率提高了刚性,耐热性 (更高的储存模量和玻璃过渡温度) 和青分散.
- 具有NCO/OH比率为1.3的PUAB显示性增加了49% (1.27MPa拉伸强度,破裂时延伸238%).
结论:
- 生物基PUAB具有高生物质PU矩阵是路面工程的可行和可持续的替代方案.
- 优化异酸盐指数可以提高机械性能,热稳定性和可加工性.
- 这项研究为开发环保基础设施提供了一个有希望的解决方案.
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