丙烯酸树脂改性的水性聚氨酯性能与结构_李芝华.pdfVIP

　2000 4 　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　·　15　5　·　 文章编号:1001-0017(2000)04-0155-03 李芝华, 　郑子樵 ( , 　410083) 　　:　(PA PA′)(PU), 。 :PU PA , PUA PU/PA PU PA ;PU/PA PU 、PA PU 、PA ;PUA PUA′ PU PA 。PUA′PU/PA PU , PUA , 。 　　:　;;;;; 　　:TQ 323.8;　TQ 325.7 　　　　　:A The Structure and Property of Water-borne Polyrethane Modified with Acrylic Resin LI Zi-hua and ZHENG Zi-qiao (Department of Materials Science and Engineering , Central South University of Technology , Changsha 410083, China ) 　　Ab stract:The ro erty and structure of water-borne olyurethane modified with acrylic resin was studied in this a er.Based on the determination of emul- sion article size and distribution, and characterization with DSC, it was found that the structure of water-borne olyurethane re arared in this work was con- formed to the restult of structural design.Of water-borne olyurethane modifiedwith acrylic resin, com atibility and degree of mixing were develo ed by forma- tion of chemical bond between PA and hard segment of PU chain;miro- hase se aration was formed by carrying core-shell latex olymerization of chemical blend;and PU chain and PA chain of mechanical mixture were mixed in the surface between PU and PA emulsion article.Some ro erties were im roved in PUA′or PU/PA, while the overall behave was develo ed in PUA. 　　Key words:water-borne olyurethane;acrylic resin;modification;structrual design;structure;ro erty 。 前　言 1　实验部分 , , 、 1.1 　 、、, (PU), 。 24%,;(PA), 45%, , ;PU 、PA PU/PA, 35%;PU 。、、 PA PUA, (PU、PA , ), 3