以自制的Ⅳ-(2-氨基乙基)氨基乙磺酸钠(AAS-Na)为亲水单体,2,4-甲苯二异氰酸酯(TDI)作为主要硬段,采用丙酮法合成了固含量大约为50％的聚氨酯分散体(PUDs).激光粒度分析表明PUDs胶粒平均粒径60～160 nm,部分PUDs胶粒呈二元分布,Zeta电位处于-50～-65 mV之间,黏度均小于200 mPa·s.透射电镜(TEM)显示PUDs胶粒呈不同尺寸的不规则球形结构.DMA测试显示PUDs膜未见软硬段的相分离,玻璃化温度(Ts)在-35～-20℃之间.电子拉力机测试结果表明伸长率为2 000％的定伸强度大多处于5～10 MPa之间,断裂伸长率均高于2 000％.
参考文献
| [1] | Li QA;Sun DC .Synthesis and characterization of high solid content aqueous polyurethane dispersion[J].Journal of Applied Polymer Science,2007(5):2516-2524. |
| [2] | D.K.Chattopadhyay;K.V.S.N.Raju .Structural engineering of polyurethane coatings for high performance applications[J].Progress in Polymer Science,2007(3):352-418. |
| [3] | Wei X.;Yu XH.;Ying Y. .A novel synthetic strategy to aromatic-diisocyanate-based waterborne polyurethanes[J].Journal of Applied Polymer Science,1998(8):1621-1626. |
| [4] | CHWNG C P;WANG C L;KUO Y M et al.On the study of polyurethane ionomer-part Ⅰ[J].Polymers For Advanced Technologies,2002,13(03):285-292. |
| [5] | Barikani M;Ebrahimi MV;Mohaghegh SMS .Preparation and characterization of aqueous polyurethane dispersions containing ionic centers[J].Journal of Applied Polymer Science,2007(6):3931-3937. |
| [6] | Lee, S.K.;Kim, B.K. .High solid and high stability waterborne polyurethanes via ionic groups in soft segments and chain termini[J].Journal of Colloid and Interface Science,2009(1):208-214. |
| [7] | Yu-Zi Jin;Yoon Bong Hahn;Kee Suk Nahm;Youn-Sik Lee .Preparation of stable polyurethane-polystyrene copolymer emulsions via RAFT polymerization process[J].Polymer: The International Journal for the Science and Technology of Polymers,2005(25):11294-11300. |
| [8] | Son SH.;Kim JH.;Lee HJ. .Effects of carboxyl groups dissociation and dielectric constant on particle size of polyurethane dispersions[J].Colloids and Surfaces, A. Physicochemical and Engineering Aspects,1998(3):295-301. |
| [9] | Matsunaga K;Nakagawa K;Sawai S;Sonoda O;Tajima M;Yoshida Y .Synthesis and characterization of polyurethane anionomers[J].Journal of Applied Polymer Science,2005(5):2144-2148. |
| [10] | Yang CH;Liu FJ;Liu YP;Liao WT .Hybrids of colloidal silica and waterborne polyurethane[J].Journal of Colloid and Interface Science,2006(1):123-132. |
| [11] | Wang HL;Fu CM;Gopalan A;Wen TC .Frequency dependent conductivity of the thin film blend of electroluminescent poly(p-phenylene vinylene) with waterborne polyurethane as ionomer[J].Thin Solid Films: An International Journal on the Science and Technology of Thin and Thick Films,2004(1/2):197-203. |
| [12] | THORSTEN R;GERALD K;HOIGER C et al.High-solids polyurethane-polyurea dispersions[P].US,2006/0128885,2006-06-15. |
| [13] | Jang JY.;Jhon YK.;Cheong IW.;Kim JH. .Effect of process variables on molecular weight and mechanical properties of water-based polyurethane dispersion[J].Colloids and Surfaces, A. Physicochemical and Engineering Aspects,2002(2/3):135-143. |
| [14] | Delpech MC.;Coutinho FMB. .Waterborne anionic polyurethanes and poly(urethane-urea)s: influence of the chain extender on mechanical and adhesive properties[J].Polymer Testing,2000(8):939-952. |
| [15] | 孙东成,董德全.双峰粒径分布的高固含量聚氨酯分散体的研究[J].高校化学工程学报,2011(02):248-253. |
| [16] | 孙东成,陈巧.含有磺酸基/羧基高固含量聚氨酯分散体的合成与表征[J].化工学报,2010(03):778-783. |
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