摘要
以多元醇[如聚己二酸丁二醇酯(PBA)、聚己二酸乙二醇酯(PEA)、聚四氢呋喃二醇(PTMG)和苯酐聚酯多元醇(2502A)等]为软段,4,4′-二苯甲烷二异氰酸酯(MDI)链段为硬段,合成了一系列聚氨酯热熔胶(PU-HMA)。着重探讨了多元醇的结晶性、组成及其配比对PU-HMA性能的影响。研究结果表明:软段的结晶性对PU-HMA的粘接强度有一定影响;PBA和PTMG共混有利于降低PU-HMA的熔点、缩短熔程,但其粘接强度下降;当软段中m(PBA)∶m(PTMG)∶m(2502A)=100∶10∶2时,相应PU-HMA的熔点(45.1℃)进一步降低,但粘接强度(4.25 MPa)明显提高。
With polyols [such as polybutanediol adipate（PBA）,polyethylene glycol adipate（PEA）,polytetra-hydrofuran-diol（PTMG） and phthalic anhydride polyester polyol（2502A）] as soft chain segments,4,4′-diphenyl-methane diisocyanate（MDI） chain segment as hard chain segment,so a series of PU-HMA （polyurethane-hot meltadhesives） were synthesized. The influences of crystallization,composition and proportion of polyols were emphatically discussed on the properties of PU-HMA. The research results showed that the crystallization of soft chain segment have some influences on the bonding strength of PU-HMA,the blending between PBA and PTMG was helpful to decrease the melting point and shorten the melting rang of PU-HMA,but its bonding strength was reduced.The melting point（45.1 ℃） was more decreased,but its bonding strength（4.25 MPa）was obviously increased for PU-HMA when the mass ratio of m（PBA）∶m（PTMG）∶m（2502A） in soft chain segments was 100∶10∶2.
出处
《中国胶粘剂》
CAS
北大核心
2014年第10期1-4,共4页
China Adhesives
基金
国家预先研究基金项目(kz-03)
关键词
热塑性
聚氨酯
热熔胶
软段
粘接强度
熔点
thermoplastic
polyurethane （PU）
hot melt adhesive （HMA）
soft chain segment
bonding strength
melting point
