中国塑料 ›› 2015, Vol. 29 ›› Issue (8): 54-58 .DOI: 10.19491/j.issn.1001-9278.2015.08.009

• 材料与性能 • 上一篇    下一篇

复合软段耐热聚氨酯泡沫塑料的制备及表征

高毅,刘际伟,顾远,田春蓉,周秋明   

  1. 中国工程物理研究院化工材料研究所
  • 收稿日期:2015-01-07 修回日期:2015-04-26 出版日期:2015-08-26 发布日期:2015-08-26

Synthesis and Properties of Heat-resistant Polyurethane with Mixed-soft Segments

  • Received:2015-01-07 Revised:2015-04-26 Online:2015-08-26 Published:2015-08-26

摘要: 选用以丙三醇为起始剂制备的聚醚多元醇N303与聚醚多元醇H303进行复配,采用一步法制备了N303/H303复合软段聚氨酯泡沫塑料(PUF),研究了N303/H303复合软段配比以及二氧化硅(SiO2)填料对PUF性能的影响。结果表明,N303/H303复合软段PUF压缩模量与冲击强度均高于单一软段PUF; 随软段中H303含量增大,PUF压缩模量与冲击强度呈先上升再下降的趋势,在N303/H303质量比为50/50时达到最大值; 添加5 %~15 %(质量分数,下同)的SiO2能作为成核剂,PUF泡孔均匀性提高且细化泡孔;PUF高温压缩性能保持较好。

关键词: 聚氨酯, 复合软段, 耐热, 力学性能

Abstract: A bi-soft-segment PUF was prepared from a mixture of polyether N303 and H303,and the latter was prepared from glycerol. The effect of the weight ratio of N303/H303 and SiO2 filler on the properties of PUF was investigated. The mechanical stability at higher temperature was tested. It was found that the compress modulus and impact strength of the bi-soft-segment PUF were higher than those of either single-soft-segment PUF. The compress modulus and impact strength increased first and then decreased as a function of H303 weight ratio and reached a maximum when the ratio of N303/H303 was 50∶50. Pre-mixed SiO2 played a role to improve the cell uniformity and stabilize mechanical properties at higher temperature.

Key words: polyurethane, mixed soft segment, heat-resistance, mechanical properties