摘要
文章以2,4-甲苯二异氰酸酯(TDI)、聚己内酯二醇(PCL)、二羟甲基丙酸(DMPA)和三羟甲基丙烷(TMP)合成水性内交联型形状记忆聚氨酯(WSPU),研究不同分子量的PCL以及亲水扩链剂的存在下,对其形状记忆性能的影响。FT-IR1、H-NMR、DSC、形状记忆性能表征结果表明,当软硬段质量分数为定值时,PCL分子量的增加使得软段结晶程度增加;当PCL分子量在5 000时,乳液性能稳定,它的形状记忆恢复率已达到95%;但随着软段分子量的增大,导致聚氨酯粒径也随之增大,乳液的不稳定性增加。
The networking waterborne shape memory polyurethane （WSPU） was synthesized from TDI, PCL, DMPA and TMP. The shape-memory behavior was investigated as a function of PCL molecular weight and hydrophilic-chain-extender. FT-IR, 1^H-NMR, DSC and shape memory testing indicate that when the content of soft-to-hard segment is certain, the degree of soft segment crystallization is enhanced with increasing of the molecular weight of PCL. When the molecular weight of PCL was 5 000, the property of latex was stable and the recovery ratio was 95 ℃. But with the increase of the soft segment molecular weight, the particle size of polyurethane latex was increased and the instability of latex was augmented.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第8期1173-1177,共5页
Journal of Hefei University of Technology：Natural Science
关键词
形状记忆
聚氨酯
软链段
shape memory
polyurethane
soft segment
