Compressive properties and thermal stability of glass beadreinforced rigid polyurethane foams
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摘要: 研究了玻璃微珠增强硬质聚氨酯泡沫塑料的制备、微观结构、压缩性能和热稳定性。结果表明: 当玻璃微珠含量为10 %时, 增强泡沫塑料的压缩强度和压缩模量达到最大; 经过硅烷偶联剂表面处理的玻璃微珠增强的泡沫塑料的压缩强度和压缩模量提高幅度较大, 起始分解温度和峰值分解温度也有一定程度的提高。SEM、XPS 和EDS 分析表明: 增强泡沫塑料的泡孔密度增加、泡孔直径变小, 玻璃微珠表面与树脂基体间界面粘结状况良好, 玻璃微珠在树脂基体中均匀分散。这些因素是造成玻璃微珠增强泡沫塑料压缩性能和热稳定性具有较大改善的原因Abstract: The preparation , microst ructure , compressive properties and thermal stability of the glass bead reinforced rigid polyurethane foams ( PUR/ GB) are studied. When the content of the glass bead reaches 10 % , the compressive st rength and compressive modulus of PUR/ GBs reach their maximum , respectively. When glass beads arepret reated with silicane coupling agent , the compressive st rength and compressive modulus improve to a large extent ; the onset decomposition temperature and peak temperature improve to some extent . Analyses by SEM , XPSand EDS reveal that the f roth density of PUR/ GB increases , frothy diameter decreases , the interfacial adhesion between the surface of glass bead and PUR mat rix is good , and glass beads disperse homogeneously in PUR mat rix.These are the reason why compressive properties and thermal stability are enhanced largely.
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Keywords:
- rigid polyurethane foam /
- glass bead /
- compressive property /
- thermal stability
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