CAJ | 학술논문

以磺酸盐聚醚二元醇和聚乙二醇单甲醚作为亲水单体,不同软段结构的多元醇、异佛尔酮二异氰酸酯(IPDI),乙二胺(EDA)为原料,采用预聚体法制备固含量50%以上的聚氨酯分散体(PUD).研究表明:PUD的ζ电位处于-50～-80 mV之间,分散体具有良好稳定性.平均粒径处于100～140 nm之间,粒径多分布于90～160 nm范围内.透射电镜(TEM)表征显示:分散体胶粒呈大小不一的球形结构.PUD的黏度随剪切速率的增加而下降,呈现假塑性流体的特征.PCDL/PTMG基PUD膜具有优良的耐水性和力学性能.
이광산염취미이원순화취을이순단갑미작위친수단체,불동연단결구적다원순、이불이동이이청산지(IPDI),을이알(EDA)위원료,채용예취체법제비고함량50%이상적취안지분산체(PUD).연구표명:PUD적ζ전위처우-50～-80 mV지간,분산체구유량호은정성.평균립경처우100～140 nm지간,립경다분포우90～160 nm범위내.투사전경(TEM)표정현시:분산체효립정대소불일적구형결구.PUD적점도수전절속솔적증가이하강,정현가소성류체적특정.PCDL/PTMG기PUD막구유우량적내수성화역학성능.
Polyurethane dispersions(PUDs) with solid content above 50 % were synthesized using polyether polyol based on sulfonate, polyethylene glycol mono-Me ether, different soft segments, isophorone diisocyanate (IPDI) and ethylene diamine (EDA) by the prepolymer method. Results showed that the Zeta potentials of PUDs were between - 50 mV and - 80 mV. The average particle sizes of PUDs were mostly in the range of 100 ～ 140 nm and the particle size distributions of PUD were mostly in the range of 90 ～ 160 nm. TEM analysis showed that the spherical shapes of the particle varied in a certain range. With the increasing of shear rate, the viscosity of PUDs reduced, showing fake-plastic fluid characteristic. PUD based on PCDL/PTMG had excellent water resistance and mechanical property.