摘要
为了解决可膨胀石墨(EG)在组合聚醚中的沉降问题,以EG为原料,采用聚乙烯吡咯烷酮(PVP)和三聚氰胺(MA)对可膨胀石墨(EG)进行表面改性,并发泡制得硬质聚氨酯泡沫复合材料(RPUF)。结果表明:经过改性后可以实现EG在组合聚醚中30 d内不沉降,解决了EG在组合聚醚中易沉降、长时间运输贮存后EG易板结在底部的问题。由20质量份MAEG制成的RPUF复合材料的综合性能,同20质量份EG制成的RPUF复合材料的综合性能相比均有提升,其中RPUF/MAEG残炭率相较于RPUF/EG提升了1.82%,阻燃性能LOI值提升至25.9%,压缩强度由0.079 MPa升至0.111 MPa,表观密度有明显改善。
This paper attempts to solve the sedimentation problem of expandable graphite(EG)in composite polyether.The study taking EG as raw material,includes conducting surface modification of expandable graphite(EG)with polyvinylpyrrolidone(PVP)and melamine(MA),and preparing the rigid polyurethane foam composites(RPUF).The results show that after modification,EG could remain in the composite polyether without settling for 30 days,solving the problem of EG settling easily in the composite polyether and forming at the bottom after long-term transportation and storage.The comprehensive performance of RPUF composite material made of 20 parts by mass MAEG has been improved compared to RPUF composite material made of 20 parts by mass EG,among which,the residual carbon rate of RPUF/MAEG increases by 1.82%compared to RPUF/EG,the flame retardancy LOI value increases to 25.9%,the compressive strength increases from 0.079 MPa to 0.111 MPa.The apparent density has been significantly improved.
作者
王振廷
赵国华
尹吉勇
Wang Zhenting;Zhao Guohua;Yin Jiyong(School of Materials Science Engineering,Heilongjiang University of Science&Technology,Harbin 150022,China)
出处
《黑龙江科技大学学报》
2025年第1期65-69,共5页
Journal of Heilongjiang University of Science And Technology
基金
黑龙江省“双一流”学科协同创新成果建设项目(LJGXCG2022-114)。
关键词
可膨胀石墨
硬质聚氨酯泡沫
三聚氰胺
组合聚醚
悬浮沉降
expandable graphite
rigid polyurethane foam
melamine
combination polyether
suspension sedimentation
