CAJ | 학술논문

以聚(四氢呋喃-co-氧化丙烯)二醇为软段、异佛尔酮二异氰酸酯为硬段,以1,2-二羟基-3-丙磺酸钠(DHPA)作为亲水扩链剂,用自乳化法合成了一系列稳定的高固含量聚氨酯乳液,分析了DHPA用量对乳液及其胶膜性能的影响.结果表明:所得聚氨酯乳液的粒径呈多元分布,乳胶粒子呈球形;乳液为假塑性流体;随着DHPA用量的增加,乳液平均粒径逐渐减小,粒径分布变窄,固含量不断增大,当DHPA质量分数为7%时,乳液的总固物质量分数可达61%.乳液具有较好的高、低温及贮存稳定性能.随着DHPA用量的增加,聚氨酯乳液胶膜的拉伸强度逐渐增大,扯断伸长率则先增大后减小;当DHPA质量分数为5%时胶膜的综合力学性能最佳;DHPA用量对胶膜的热稳定性没有明显影响.
이취(사경부남-co-양화병희)이순위연단、이불이동이이청산지위경단,이1,2-이간기-3-병광산납(DHPA)작위친수확련제,용자유화법합성료일계렬은정적고고함량취안지유액,분석료DHPA용량대유액급기효막성능적영향.결과표명:소득취안지유액적립경정다원분포,유효입자정구형;유액위가소성류체;수착DHPA용량적증가,유액평균립경축점감소,립경분포변착,고함량불단증대,당DHPA질량분수위7%시,유액적총고물질량분수가체61%.유액구유교호적고、저온급저존은정성능.수착DHPA용량적증가,취안지유액효막적랍신강도축점증대,차단신장솔칙선증대후감소;당DHPA질량분수위5%시효막적종합역학성능최가;DHPA용량대효막적열은정성몰유명현영향.
A series of novel stable polyurethane emulsion with high solid and low viscosity were prepared by self-emulsification, using poly(tetrahydrofuran-co-epoxy propane) glycol (Ng 210) as soft segment, isophorone diisocyanate(IPDI) as hard segment and 1,2-dihydroxy-3-propanesulfonic acid salt(DHPA) as hydrophilic chain extender. Influence of the amount of DHPA on properties of polyurethane emulsion and its film were discussed. The results showed that the obtained emulsion had polydispersibility in particle size and was spherical in particle shape. It is noticed that with increasing the amount of DHPA, the average particle size of the emulsion decreased, particle size distribusion became narrower and solid content increased. When the mass fraction of DHPA was 7%, solide mass fraction reached 61%. The high solid emulsion exhibited pseudo plastic behavior. In addition, polyurethane emulsion were endowed with good stability at high temperature and low temperature as well as the storage stability. When the mass fraction of DHPA was 5%, the polyurethane film exhibited better mechanical properties, and the amount of DHPA had no influence on thermal stability.