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- W2356433495 abstract "Sulphonated waterborne polyurethane emulsions with 50% solid-content were successfully synthesized by using poly(1,4-butanediol adipate)diol(PBA),isophorone diisocyanate(IPDI) and hexamethylene diisocyanate(HDI) as the main raw materials,N-(2-aminoethyl)-amino ethane sulphonated sodium as hydrophilic chain extender,and HDI trimer(HT) as a modifier.The effects of the feeding method and the amount of HDI trimer on the latex particle size and distribution,Zeta potential and viscosity of waterborne polyurethane emulsions,and the water resistance,crystallinity and mechanical properties of the cast films of synthesized polyurethane were studied respectively by Malvern laser particle size analyzer,Brookfield viscometer,universal tensile machine,Fourier transform infrared spectroscopy(FT-IR),nuclear magnetic resonance(1H-NMR),X-ray diffraction analysis(XRD),differential scanning calorimetry analysis(DSC) and transmission electron microscopy(TEM).The results show that,with the increase of the amount of HDI trimer,the viscosity of waterborne polyurethane emulsion decreases,the average particle size and its distribution of latex particles increase,and the tensile strength and elongation at break of the cast films are increased firstly and then decreased.The introduction of the HDI trimer into the polyurethane chain destroys the arrangement regularity of the polyurethane soft segment,which results in a slightly lower film crystallinity.When the ratio of HDI trimer to IPDI is 1:3(mass ratio),the synthesized polyurethane shows excellent performance,which has the emulsion particle size of 199.3 nm,Zeta potential of 42.7 mV,the film water absorption of 3.8% and the film relative crystallinity of 50.62%." @default.
- W2356433495 created "2016-06-24" @default.
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- W2356433495 date "2013-01-01" @default.
- W2356433495 modified "2023-09-23" @default.
- W2356433495 title "Synthesis and Properties of High Solid Content Sulphonated Waterborne Polyurethane Modified by HDI Trimer" @default.
- W2356433495 hasPublicationYear "2013" @default.
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