中文摘要
本项目提出了核-壳结构型阻燃剂粒子的结构设计和制备方法，成功获得了以可膨胀石墨（pEG）为核、聚甲基丙烯酸甲酯为壳的核-壳结构阻燃剂粒子，并就就该阻燃剂对聚氨酯泡沫塑料的阻燃特性进行了深入研究。研究发现，核-壳粒子表面的-COOH基团跟异氰酸酯的-NCO发生反应，使得粒子与基体间产生化学键连接，大大增强了粒子与RPUF的界面结合力，从而提高复合材料的力学性能。由于外层聚合物壳层的保护，pEG粒子产生的CO2、H2O、SO2等气体不易立即逃逸，导致pEG粒子的膨胀体积增加，从而极高的改善了复合材料的阻燃性能。本课题的研究成果为开发具有良好力学性能和优良阻燃性的聚合物轻质复合材料提供了新的思路和方法，并为发展具有优异综合性能的复合材料提供理论基础和实验依据。项目完成期间，课题组在Polymer Degradation and Stability等杂志发表相关论文8篇，其中SCI收录6篇，1项专利正在申请中，培养硕、博士研究生6名。
英文摘要
The design of structure and preparation method of core-shell flame retardant composite particles was performed. pEG-PMMA latexes were successfully prepared by coating pEG with PMMA via in-situ emulsion polymerization. The application to rigid polyurethane foams (RUPF) as a flame retardation was deeply studied.The pEG-PMMA particles with -COOH groups can react with the R-NCO groups of isocyanurate, leading to a good compatibility of pEG-PMMA/RPUF composite between the fillers and the matrix. Therefore, the mechanical strength of pEG-PMMA/RPUF was greatly increased compared with pEG/RPUF. When pEG-PMMA particles were subjected to heat, the escaping speed of the blowing gases (CO2、H2O、SO2) from the edge of graphite flakes was slowed down owing to the shielding action of PMMA surrounding to the surface of pEG. As a result, the flame retardation properties of pEG-PMMA/RPUF was greatly improved. The important significance of this study is that it provides the new route and method to prepare light-weighted polymer composites with well improved flame retardation and mechanical properties. It also gives the inspiration of theoretical principles and experiment basis to exploit these materials as new functional composites. Eight professional papers based on these results were published in several international professional magazines, such as Polymer Degradation and Stability, six of which were indexed by ISI database(SCI). In addition, one technology has been submitted to apply the national patent.At the same time, six graduate students were graduated and got their degrees.
结题摘要
本项目提出了核-壳结构型阻燃剂粒子的结构设计和制备方法，成功获得了以可膨胀石墨（pEG）为核、聚甲基丙烯酸甲酯为壳的核-壳结构阻燃剂粒子，并就就该阻燃剂对聚氨酯泡沫塑料的阻燃特性进行了深入研究。研究发现，核-壳粒子表面的-COOH基团跟异氰酸酯的-NCO发生反应，使得粒子与基体间产生化学键连接，大大增强了粒子与RPUF的界面结合力，从而提高复合材料的力学性能。由于外层聚合物壳层的保护，pEG粒子产生的CO2、H2O、SO2等气体不易立即逃逸，导致pEG粒子的膨胀体积增加，从而极高的改善了复合材料的阻燃性能。本课题的研究成果为开发具有良好力学性能和优良阻燃性的聚合物轻质复合材料提供了新的思路和方法，并为发展具有优异综合性能的复合材料提供理论基础和实验依据。项目完成期间，课题组在Polymer Degradation and Stability等杂志发表相关论文8篇，其中SCI收录6篇，1项专利正在申请中，培养硕、博士研究生6名。