摘要
将HDI与IPDI按照不同的摩尔比混合后与PTMG-2000、1,4-BG、DMPA反应,制备了具有不同硬段规整度的系列水性聚氨酯;利用WXRD、DSC、FT-IR等研究了HDI对水性聚氨酯的硬段结晶性能的影响,分析了硬段结晶度与粘接性能之间的关系。结果表明,随着HDI/IPDI摩尔比的增加,水性聚氨酯分子链上氨基甲酸酯键之间氢键密度提高,硬段结晶性能也随之改善;对铝箔的初粘接强度显著增强,最终粘接强度可达8.5 MPa左右。
A series of aqueous polyurethane dispersions with different hard-segment regularity were prepared by the reaction of varying HDI/IPDI molar ratio, PTMG-2000, 1,4-BG, DMPA. Hard-segment crystallinity of aqueous polyurethane films were studied by WXRD、DSC、FT-IR and so on. relationship between adhesive properties and hard-segment erystallinity were discussed. Results show that crystallinity of hard-segment and hydrogen bonds density between carbamates are improvement with the ineresement of HDI /IPDI molar ratio, preliminary adhesive strength to aluminum foils enhances apparently. The final adhesive strength can arrive at about 8.5 MPa.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2009年第3期71-74,共4页
Polymer Materials Science & Engineering
基金
安徽省青年基金资助项目(2006jq1008)
关键词
水性聚氨酯
硬段
结晶
粘接性能
aqueous polyurethane
hard-segment
crystallinity
adhesive strength
