Synthesis of UV crosslinkable waterborne siloxane–polyurethane dispersion PDMS-PEDA-PU and the properties of the films

Bai, Chenyan; Zhang, Xingyuan; Dai, Jing; Wang, Jinhua

doi:10.1007/s11998-007-9062-8

Cited by 57 publications

(31 citation statements)

References 13 publications

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“…Due to the strong hydrophobic Si-O-Si bonds and the low surface energy of HPMS-APE segments, polyurethanes had a highly hydrophobic nature, and it brought polyurethanes good hydrolytic stability and fast water release on drying 27 . Further, the water resistance of these materials was superior to that of previously published PDMS-based polyurethanes 21,22 . Accordingly, we confirmed that HBPUs derived from HPMS-APE presented excellent water resistance.…”

Section: Water Absorption Testingmentioning

confidence: 74%

“…Decomposition of the soft segments followed the polyester or the polyether. Generally speaking, the decomposition temperature for polyurethanes was at about 240 °C, but for hyperbranched polyurethanes, the decomposition temperature was higher than 300 °C 22,23 . From the data, it could be seen that the T on of HBPUs was about the same up to 320 °C and the T max1 of HBPUs changed very little, while the T max2 of all HBPUs with HPMS-APE segments were much higher than that of HBPU0 based on pure PPG.…”

Section: H-nmr and Ft-ir Spectroscopymentioning

confidence: 98%

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Enhanced Properties of Hyperbranched Polyurethane Elastomers Based on Polydimethylsiloxane/Polyether Mixed Soft Segments

Ma¹,

Tang²,

Wang³

et al. 2014

J. Chil. Chem. Soc.

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A novel hydroxyl-terminated polymer HPMS-APE was synthesized by introducing allyl polyethylene oxide (APE) into hydrogen-terminated polydimethylsiloxane (HPMS) backbone by hydrosilylation reaction. A series of hyperbranched polyurethane elastomers (HBPUs) based on HMPS-APE and polypropylene glycol (PPG) mixed soft segments were successfully synthesized with trimethylolpropane (TMP) as a chain extender. The effect of HPMS-APE segments content on enhanced properties of HBPUs were characterized by Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), atomic force microscopy (AFM), thermogravimetric analysis (TGA), mechanical testing and water absorption. It was found that incorporating HPMS-APE in polyurethanes made substantial changes in their morphology, thermal properties, mechanical properties and water absorption. When 5 wt% HPMS-APE was incorporated in HBPUs, the extent of microphase separation between hard and soft segments was the best, resulting in polyurethanes without significant compromise in tensile strength and elasticity. Furthermore, HBPUs derived from HPMS-APE presented excellent thermal stability and unique water resistance.

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Section: Water Absorption Testingmentioning

confidence: 74%

Section: H-nmr and Ft-ir Spectroscopymentioning

confidence: 98%

Enhanced Properties of Hyperbranched Polyurethane Elastomers Based on Polydimethylsiloxane/Polyether Mixed Soft Segments

Ma¹,

Tang²,

Wang³

et al. 2014

J. Chil. Chem. Soc.

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“…This suggested that the UV-curing speed decreased by the increment of fluorine content, which meant that the fluorine chain had a negative effect on the UV-curing speed of the fluorinated polyurethane acrylate. Bai et al also found that the introduction of hydrophobic silica chain into the polyurethane system had a bad effect on the UV-curing kinetic [27].…”

Section: Synthesis and Characterization Of Uv-curable Waterborne Fpuamentioning

confidence: 99%

Synthesis and characterization of UV-curable waterborne polyurethane acrylate possessing perfluorooctanoate side-chains

Liu

Pan

et al. 2012

J Polym Res

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The dispersion of UV-curable waterborne polyurethane acrylate possessing perfluorooctanoate side-chains (FPUA) terminated with pentaerythritol triacrylate (PETA) was synthesized by incorporating fluorine groups into the side chains of the polyurethane macromolecular from condensation polymerization by using perfluorooctanoate glycerate (OF-diols) as chain extender, while the polyurethane macromolecular was synthesized from isophoronediisocyanate (IPDI), dimethylol propionic acid (DMPA), and poly (propylene glycol) (PPG) etc. The chain extender was prepared from 2,2-dimethyl-1,3-dioxolane-4-methyl perfluorooctanoate (OF-diols-pg) by acid hydrolysis with trifluoroacetic acid. The structure of FPUA was characterized by FTIR, NMR, elemental analysis, UV-vis and Mass spectra, and the properties of the synthesized FPUA emulsion were also discussed. The effect of fluorine content on the UV-curing dynamics was studied and the UV-curing speed decreased with increment in fluorine content. Contact angle measurements shown that the hydrophobic property of the surface greatly increased by incorporation of fluorine into the polyurethane chain. In addition, scanning electron spectroscopy (SEM) analysis was applied to characterize the morphology of the fracture surface of the UV-cured FPUA which became phase-mixed after annealing.

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“…3,14,15 Nevertheless, the primary amino groups existing in the PU backbone would like to form partial crosslinking among PU molecular chains; this results in poor dispersion stability. 16 Thus, the utilization of secondary amino-terminated siloxane oligomers or hydroxylalkyl-terminated siloxane oligomers into the PU system could be a better choice, [17][18][19] but the excess siloxane oligomers, which are only blocked into PU system as chain extenders, results in a very weak mechanical strength and serious incompatibility, 2 whereas crosslinking trifunctional silane or silane-modified inorganic silica or clay could also be introduced into the PU system to form PU/silica or clay-hybrid composites. [20][21][22][23] Although the mechanical properties and water resistance were enhanced, stable properties were difficult to improve with trifunctional silane, silane-modified inorganic silica, or clay (>2.5%).…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of aqueous polyurethane dispersions with well‐defined soft segments

Qun-chao

Gong

2011

J of Applied Polymer Sci

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Novel aqueous polyurethane (PU) hybrid dispersions were successfully prepared with 5-15 mol % functionalized hexamethylene diisocynate trimer modified by N-(n-butyl)-3-aminopropyltriethoxysilane and dihydroxylpropyl-terminated siloxane oligomers (TS). The results of the differential scanning calorimetry and X-ray diffraction tests show that the degree of segment order was reduced by the introduction of TS. The hybrid polymer films with TS introduced into the PU backbone displayed excellent water and xylene resistance. Atomic force microscopy showed that the films had a smooth surface. It was noticeable that the tensile strength (r b ) and Young's modulus of the films increased simultaneously when TS was incorporated into PU; r b of the PU15 film with 15 mol % TS was much higher than that of the neat PU0 film, and the breaking elongation of the film with 10 mol % TS was clearly higher than that of the other films. The results indicate that an appropriate content of TS significantly improved the properties of the aqueous PU hybrids.

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Synthesis of UV crosslinkable waterborne siloxane–polyurethane dispersion PDMS-PEDA-PU and the properties of the films

Cited by 57 publications

References 13 publications

Enhanced Properties of Hyperbranched Polyurethane Elastomers Based on Polydimethylsiloxane/Polyether Mixed Soft Segments

Enhanced Properties of Hyperbranched Polyurethane Elastomers Based on Polydimethylsiloxane/Polyether Mixed Soft Segments

Synthesis and characterization of UV-curable waterborne polyurethane acrylate possessing perfluorooctanoate side-chains

Preparation and characterization of aqueous polyurethane dispersions with well‐defined soft segments

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