Surface modification of high heat resistant UV cured polyurethane dispersions

Lee, Min Hee; Jang, Moon Kyoung; Kim, Byung Kyu

doi:10.1016/j.eurpolymj.2007.07.044

Cited by 11 publications

(6 citation statements)

References 26 publications

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“…Therefore, soft segment-hard segment phase separation is limited and the hydrogen bonding of ionic and urethane groups of the soft segments with urethane groups of the hard segments increases the phase mixing; thus, a single glass transition is observed. 13,21 The glass transition temperature (T g ) increases with the addition of increasing amounts of PMDA, as the hard segment content increases. The increase in MLGLY also leads to the increase in cross-linking density.…”

Section: Properties Of Uv-cured Cast Films (Mechanical Properties Swelling and Gel Content)mentioning

confidence: 99%

“…The widely accepted approach to improve the thermal stability of PUs is by incorporating an aromatic amide, 17 an aromatic imide, 18 a silicon group, or a fluoride group into the hard segment. [19][20][21][22][23][24] The ultraviolet (UV)-cured WPU is conventionally prepared by ending the PU with single-hydroxyl acrylate 25 or by introducing the double bond with hydroxyl-terminated polybutadiene 6 or the vinyl groups into the PU chains. 26 Hence, PU has low C¼C content.…”

Section: Introductionmentioning

confidence: 99%

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Preparation and properties of novel ultraviolet-cured waterborne polyurethanes

Fang

Zhou

Zhong

et al. 2013

High Performance Polymers

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A new ultraviolet (UV)-cured waterborne polyurethane (WPU) mainly composed of ionic soft segments, imide groups, and a new water-soluble UV-cured cross-linking agent containing both C¼C bond and carboxy group was prepared. The ionic soft segments were prepared by 1,6-hexamethylene diisocyanate , poly(propylene glycol)-600, and dimethylol butanoic acid. The imide groups were introduced into polyurethane by extending them with pyromellitic dianhydride (PMDA). The new water-soluble UV-cured cross-linking agent (MLGLY) was synthesized by hydrophilic maleic anhydride and glycerol oligomer. The particle size and the viscosity of the new anionic WPU as well as the water swelling, gel content, mechanical properties, and thermal stability of the UV-cured WPU cast films were investigated. The results showed that the best performance of WPU was obtained with 0.024 mol of PMDA and 5 wt% of MLGLY.

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Section: Properties Of Uv-cured Cast Films (Mechanical Properties Swelling and Gel Content)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation and properties of novel ultraviolet-cured waterborne polyurethanes

Fang

Zhou

Zhong

et al. 2013

High Performance Polymers

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“…Kim had reported a method to modify the surface of UV cured polyurethane by blending the fluorinated PU with base waterborne PUA prior to dispersion in water [24]. However, little work has been done to prepare UV-curing waterborne fluorinated polyurethane from condensation polymerization.…”

Section: Introductionmentioning

confidence: 98%

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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“…20 To improve the mechanical properties of PU, various cross-linking agents such as glycerol, pentaerythritol, or cellulose derivatives 21 have been tested. Additionally, terminally cross-linking PU with vinyl polymers 22 and lateral cross-linking of PU have been reported. 23 In a different cross-linking method, polysiloxane was used to laterally cross-link PUs by a sol-gel method because of mild sol-gel reaction conditions and the absence of PU aggregation.…”

Section: Introductionmentioning

confidence: 99%

Preparation of hybrid polyurethane–silica composites by a lateral sol-gel process using tetraethyl orthosilicate

Chung

Choi

et al. 2017

Journal of Composite Materials

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Hybrid polyurethane–silica composites were prepared using a sol-gel reaction between tetraethyl orthosilicate and triethoxysilyl groups grafted onto polyurethane. The TS series contained the same polyurethane composition but the tetraethyl orthosilicate content varied. Soft segment Tm and Tg values were not affected by the tetraethyl orthosilicate content, while ΔH for soft segment melting and crystallization increased with the tetraethyl orthosilicate content. The tensile strength sharply increased from the cross-linking of the grafted silica at low tetraethyl orthosilicate concentrations but decreased with the increase of tetraethyl orthosilicate content because excess silica inhibited cross-linking. The shape recovery of the TS series improved during cyclic tests, and shape retention slightly decreased as the test cycles repeated. Low temperature flexibility moderately improved with the formation of grafted silica. Therefore, the grafted sol-gel silica formation demonstrated a tensile strength improvement and reproducible shape recovery.

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Surface modification of high heat resistant UV cured polyurethane dispersions

Cited by 11 publications

References 26 publications

Preparation and properties of novel ultraviolet-cured waterborne polyurethanes

Preparation and properties of novel ultraviolet-cured waterborne polyurethanes

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

Preparation of hybrid polyurethane–silica composites by a lateral sol-gel process using tetraethyl orthosilicate

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