不同软链段对水性聚氨酯性能的影响
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摘要
以低聚物多元醇、IPDI(异佛尔酮二异氰酸酯)、亲水扩链剂DMPA(2,2-二羟甲基丙酸)和成盐剂三乙胺为主要原料,合成一组软段成分不同的水性聚氨酯乳液。通过测定水性聚氨酯乳液的固含、黏度、结构,以及水性聚氨酯胶膜的耐水性、力学性能、T型剥离强度等,对比了不同类型软段对乳液及胶膜性能的影响。研究结果表明:由含6个碳的聚酯多元醇为软段合成的水性聚氨酯的黏度、耐水性、机械强度、T型剥离强度等数据较好。
A set of waterborne polyurethane emulsions with different soft segments were synthesized from oligomer polyols,IPDI(isophorone diisocyanate),hydrophilic chain extender DMPA(2,2-dimethoxy methyl propionic acid)and salt forming agent triethylamine. By measuring the solid content,viscosity and structure of waterborne polyurethane emulsion,as well as the water resistance,mechanical properties and T-peel strength of emulsion film,the effects of different soft segments on the properties of emulsion and film were compared. The results showed that the viscosity,water resistance,mechanical strength and T-peel strength of waterborne polyurethane synthesized from 6-carbon polyester polyols as soft segments were better.
A set of waterborne polyurethane emulsions with different soft segments were synthesized from oligomer polyols,IPDI(isophorone diisocyanate),hydrophilic chain extender DMPA(2,2-dimethoxy methyl propionic acid)and salt forming agent triethylamine. By measuring the solid content,viscosity and structure of waterborne polyurethane emulsion,as well as the water resistance,mechanical properties and T-peel strength of emulsion film,the effects of different soft segments on the properties of emulsion and film were compared. The results showed that the viscosity,water resistance,mechanical strength and T-peel strength of waterborne polyurethane synthesized from 6-carbon polyester polyols as soft segments were better.
引文
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[11]FU H,WANG Y,CHEN W,et al.A novel silanized CoFe2O4/fluorinated waterborne polyurethane pressure sensitive adhesive[J].Applied Surface Science,2015,351:1204-1212.
[2]SCRINZI E,ROSSI S,DEFLORIAN F,et al.Evaluation of aesthetic durability of waterborne polyurethane coatings applied on wood for interior applications[J].Progress in Organic Coatings,2011,72(1-2):81-87.
[3]HU X,ZHANG X,DAI J,et al.Synthesis and fluorescent investigations of VBL-based waterborne polyurethane dye[J].Journal of Luminescence,2011,131(10):2160-2165.
[4]BYCZY?SKI U,DUTKIEWICZ M,MACIEJEWSKI H.Synthesis and properties of high-solids hybrid materials obtained from epoxy functional urethanes and siloxanes[J].Progress in Organic Coatings,2015,84:59-69.
[5]CAKI S M,RISTI I S,KRAKOVSKY I,et al.Crystallization and thermal properties in waterborne polyurethane elastomers:influence of mixed soft segment block[J].Materials Chemistry and Physics,2014,144(1-2):31-40.
[6]AMROLLAHI M,SADEGHI G M M.Assessment of adhesion and surface properties of polyurethane coatings based on non-polar and hydrophobic soft segment[J].Progress in Organic Coatings,2016,93:23-33.
[7]RUEDA-LARRAZ L,D ARLAS B F,TERCJAK A,et al.Synthesis and microstructure-mechanical property relationships of segmented polyurethanes based on a PCL-PTHF-PCL block copolymer as soft segment[J].European Polymer Journal,2009,45(7):2096-2109.
[8]WU J,CHEN D.Synthesis and characterization of waterborne polyurethane based on covalently bound dimethylol propionic acid to e-caprolactone based polyester polyol[J].Progress in Organic Coatings,2016,97:203-209.
[9]LIU K,SU Z,MIAO S,et al.UV-curable enzymatic antibacterial waterborne polyurethane coating[J].Biochemical Engineering Journal,2016,113:107-113.
[10]SANTAMARIA-ECHART A,ARBELAIZ A,SARALEGIA,et al.Relationship between reagents molar ratio and dispersion stability and film properties of waterborne polyurethanes[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2015,482:554-561.
[11]FU H,WANG Y,CHEN W,et al.A novel silanized CoFe2O4/fluorinated waterborne polyurethane pressure sensitive adhesive[J].Applied Surface Science,2015,351:1204-1212.