Functional latex and thermoset latex films

Taylor, James W.; Winnik, Mitchell A.

doi:10.1007/s11998-004-0011-5

Cited by 108 publications

(126 citation statements)

References 73 publications

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“…These kinds of macromolecules possess significant properties from both a fundamental and an applied point of view [1,2]. On this matter, (co)polymerization of monomers comprising functional groups is the most successful method implemented for preparing functional polymers [3].…”

Section: Introductionmentioning

confidence: 99%

Copolymers of glycidyl methacrylate and octadecyl acrylate: synthesis, characterization, swelling properties, and reactivity ratios

Darvishi

Zohuriaan‐Mehr

Marandi

et al. 2012

Designed Monomers and Polymers

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The free radical copolymerization of glycidyl methacrylate (GMA) and octadecyl acrylate (ODA) was carried out at 70°C in solution using toluene as solvent and 2,2′-azobisisobutyronitrile (AIBN) as initiator. The copolymer compositions were determined using 1 H NMR spectroscopy. The monomer reactivity ratios were computed using five linear methods at low conversions, i.e. Mayo-Lewis (ML), Fineman-Ross (FR), inverted Fineman-Ross (IFR), Ezrielev-Brokhina-Roskin (EBR) and Kelen-Tudos (KT). The reactivity ratios resulted from different methods are in agreement with each other and showed higher reactivity for GMA monomer in comparison with ODA monomer (FR: r G = 1.29 and r O = 0.68). Crosslinked GMA-ODA copolymers were also prepared using ethylene glycol dimethacrylate as a crosslinker. Thermal properties and swelling behaviors of crosslinked copolymers in different polar and nonpolar solvents were evaluated. GMA incorporation in the crosslinked copolymers improved T g values, while decreased T m quantities and swelling in nonpolar solvents. The swelling values are in the acceptable range and the prepared functional crosslinked copolymers can be used for nonpolar solvents absorbency applications.

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Section: Introductionmentioning

confidence: 99%

Copolymers of glycidyl methacrylate and octadecyl acrylate: synthesis, characterization, swelling properties, and reactivity ratios

Darvishi

Zohuriaan‐Mehr

Marandi

et al. 2012

Designed Monomers and Polymers

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“…When T ff > T g , particle deformation and coalescence will proceed to yield a continuous film. In thermosetting latex films, crosslinking can be used to raise the polymer's hardness, 11 but thermoplastic materials will remain in the soft state when T u > T g and hence will not be suitable as a protective coating. Composites of hard and Published in Langmuir (2011) 27(6):2176-2180…”

mentioning

confidence: 99%

Resolving the Film-Formation Dilemma with Infrared Radiation-Assisted Sintering

et al. 2011

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The film formation of an acrylate latex with a glass transition temperature of 38 °C has been achieved through the use of near-infrared (NIR) radiative heating. A hard, crack-free coating was obtained without the addition of plasticizers. Sintering of acrylate particles was confirmed through measurements using atomic force microscopy. The addition of an NIR-absorbing polymer increased the rate of particle deformation such that it was significantly greater than obtained in a convection oven at 60 °C. The results are consistent with a lower polymer viscosity under infrared radiation, according to a simple analysis using a standard model of sintering.

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“…In waterborne systems, the time at which crosslinking occurred in the film formation process has a profound effect on the properties. 8,11,[29][30][31][32][33] To achieve maximum film strength, particles should remain relatively free of crosslinking in the dispersion but undergo extensive crosslinking once they have formed a coating film on the substrate. The evaporating of water from crosslinkable latex is an important factor to determine the changes in viscosity of the wet latex film.…”

Section: Effect Of Cured Temperature On the Keto-hydrazide Crosslinkimentioning

confidence: 99%

The diacetone acrylamide crosslinking reaction and its control of core‐shell polyacrylate latices at ambient temperature

Zhang

Liu

Huang

et al. 2011

J of Applied Polymer Sci

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Self crosslinkable core-shell polyacrylate latices (PAs) cured at ambient temperature were synthesized by semicontinuous-seeded emulsion polymerization with diacetone acrylamide (DAAM) and adipic dihydrazide (ADH) as crosslinkable monomers. The influences of DAAM monomer mass content, neutralizer, and curing temperature on the properties of self crosslinkable coreshell latices and the keto-hydrazide crosslinking were discussed. The spectroscopic techniques such as Fourier transform infrared spectroscopy (FTIR), differential scanning calorimeter (DSC), atomic force microscopy (AFM), transmission electron microscopy (TEM), and contact angle instruments were used to determine the structure and properties of PAs. The water evaporating rate during the film-forming process of self crosslinkable core-shell latices was also investigated. FTIR analyses demonstrate that the keto-hydrazide crosslinking reaction does not occur in the latex environment but occurs at ambient temperature with the evaporation of water during the film-forming process. The results of DSC show that the core-shell crosslinkable PAs have two glass transition temperatures (T g ), and T g s of crosslinked film are higher than that of non crosslinked fim. Moreover, the keto-hydrazide reaction is found to be acid catalyzed and favored by the loss of water and the simultaneous decrease in pH arising from the evaporation of ammonia or amines during filmforming process. Hence, in the volatile ammonia or amines neutralized latices, the latex pH value adjusted to 7-8, which not only ensure the crosslinkable latex with good storage stability but also obtain a coating film with excellent performances by introducing the keto-hydrazine crosslinking reaction.

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Functional latex and thermoset latex films

Cited by 108 publications

References 73 publications

Copolymers of glycidyl methacrylate and octadecyl acrylate: synthesis, characterization, swelling properties, and reactivity ratios

Copolymers of glycidyl methacrylate and octadecyl acrylate: synthesis, characterization, swelling properties, and reactivity ratios

Resolving the Film-Formation Dilemma with Infrared Radiation-Assisted Sintering

The diacetone acrylamide crosslinking reaction and its control of core‐shell polyacrylate latices at ambient temperature

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