将异佛尔酮二异氰酸酯和聚乙二醇反应获得预聚体,用1,6-己二醇扩链,并用长链烷基醇封端,最终获得内部含有疏水链段的聚氨酯缔合型增稠剂(HEUR).采用FT-IR和1H NMR对HEUR的结构进行了表征;通过黏度测定,着重研究了相对分子质量及其分布、疏水链段的位置和大小对增稠效果的影响,同时分析了增稠剂的加入对苯丙乳液粒径及其分布的影响.结果表明:当末端疏水链一定时,增加亲水链长度,有助于黏度的提高;相同浓度下,相对分子质量分布窄的样品比分布宽的样品增稠效果好;分子内部疏水链段会使黏度降低,同时会使乳液粒径增大,乳液黏度的大小完全由增稠剂分子末端疏水链以及增稠剂的用量控制.
参考文献
| [1] | 刘震,许钧强,夏红兵.聚氨酯缔合型增稠剂的研制[J].涂料工业,2006(10):26-28,31. |
| [2] | BARMAR M .Study of the effect of PEG length in UniHEUR thickener behavior[J].Journal of Applied Polymer Science,2009,111(4):1751-1754.,2009. |
| [3] | BARMAR M,KAFFASHI B,BARIKANI M .Investigating the Uni-HEUR thickener performance considering hydrophilic segment length[J].Colloids and Surfaces A:Physicochem Eng Aspects,2010,364:105-108.,2010. |
| [4] | MAY R,KACZMARSKI J P,Glass J E .Influence of molecular weight distributions on HEUR aqueous solution rheology[J].Macromolecules,1996,29(13):4745-4753.,1996. |
| [5] | 高楠,张琢,董擎之.缔合型水性聚氨酯增稠剂的制备及其对聚氨酯水分散液性能的影响[J].涂料工业,2012(05):20-22,27. |
| [6] | BARMAR M,BARIKANI M,KAFFASHI B .The effect of molecular weight on the behaviour of step-growth hydrophobically modified ethoxylated urethane(S-G HEUR) end-capped with dodecyl alcohol[J].Iranian Polymer Journal,2004,13(3):241-246.,2004. |
| [7] | BARMAR M,KAFFASHI B,BARIKANI M .Investigating the effect of hydrophobic structural parameters on the thickening properties of HEUR associative copolymers[J].European Polymer Journal,2005,41(3):619-626.,2005. |
| [8] | 杨升,周瑜,林银利,杨明华,郑加英,高文,黄丹,陈红祥.含疏水侧基的水性聚氨酯的合成及其增稠性能[J].涂料工业,2012(11):18-21,26. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%