摘要
以α-丁基-ω-{3-[2-羟基-3-(N-甲基-N-羟乙胺基)丙氧基]丙基}聚二甲基硅氧烷和α,ω-双[3-(1-甲氧基-2-羟基-丙氧基)丙基]聚硅氧烷为原料,合成了聚硅氧烷接枝和嵌段改性聚氨酯水分散体,考察了改性方法及加料顺序对水性聚氨酯胶膜性能的影响。结果表明,在聚硅氧烷含量相同的条件下,胶膜的耐水性和耐溶剂性,接枝改性试样优于嵌段改性的试样,前加料方式的试样优于后加料的试样。透射电镜显示水分散体中分散相颗粒的形状随聚硅氧烷用量的增加变得更不规则,扫描电镜图片表明,接枝改性的试样相分离程度更明显。
Both of polydimethylsiloxane modified graft polyurethane dispersions（GWPU） and polydimethylsiloxane modified block polyurethane dispersions（BWPU） were synthesized based on α-butyl-omega-{3-[2-hydroxy-3-（N-methyl-N-hydroxy-ethylamino）propoxy]propyl}polydimethylsiloxane and bis（methyoxyl hydroxyl）-functionalized polysiloxane.The effects of modification methods and feed order on copolymer properties were systematically studied.The results show that when the same amount of polydimethylsiloxane（PDMS） is added,the films of GWPU show better water and oil resistance than BWPU films.In addition,GWPU films with PDMS added first show better properties than the samples with PDMS introducing at last.Transmission electron microscopy results show that the particle morphology becomes irregular with PDMS content increasing.Scanning electron microscopy imagines show that GWPU films have a higher degree of microphase separation.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2011年第5期62-66,共5页
Polymer Materials Science & Engineering
基金
山东省自然科学基金资助项目(Y2006B22)
关键词
聚硅氧烷
接枝
嵌段
改性
聚氨酯水分散体
polydimethylsiloxane
graft
block
modified
polyurethane dispersion
