Thermal and photochemical stability of poly(methyl methacrylate) and its blends with poly(vinyl acetate)

Kamińska, A.; Świątek, M.

doi:10.1007/bf01979251

Cited by 17 publications

(14 citation statements)

References 34 publications

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“…143,144 These results indicate that these phenomena occurred due to the increase in the local temperature caused by the photothermal conversion of Au NPs.…”

Section: Three-dimensional Processingmentioning

confidence: 80%

Photochemistry for the Synthesis of Noble Metal Nanoparticles

Sakamoto¹,

Majima²

2010

Bulletin of the Chemical Society of Japan

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The synthesis of metal nanoparticles is an interdisciplinary subject that is attracting intense research and development owing to the fundamental scientific value of nanometer-sized metal, as well as the broad range of potential applications of metal nanoparticles. Photochemistry plays an important role in various aspects of this research area. It is a unique tool for synthesizing metal nanoparticles, as well as an important technique for investigating the formation mechanism. Metal nanoparticles formation triggered by photochemical reaction is effective for investigating formation mechanisms. We succeeded in observing the formation of metal nanoparticles and clusters by using spectroscopic methods. In addition, single-molecule fluorescent spectroscopy provided important insights into the photochemical reactivity of metal clusters. This photochemical reactivity offers a promising possibility with regard to metal clusters. We developed strategies for constructing metal nanoparticles using a series of photochemical techniques. In situ photochemical synthesis is an effective method for the fabrication of metal nanoparticles, as well as composite materials. A multicolor excitation-induced photochemical reaction resulted in the reduction of metal ions with a highly negative reduction potential, recyclable photosensitization, and 3-D direct laser writing of metal nanoparticles. These new strategies will expand the possible applications of photochemistry for metal nanoparticles synthesis.

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“…143,144 These results indicate that these phenomena occurred due to the increase in the local temperature caused by the photothermal conversion of Au NPs.…”

Section: Three-dimensional Processingmentioning

confidence: 80%

Photochemistry for the Synthesis of Noble Metal Nanoparticles

Sakamoto¹,

Majima²

2010

Bulletin of the Chemical Society of Japan

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“…Thermal degradation mechanisms of PVAc, PMMA and PEtA are different [19,20]. As a clue of the thermal stability of the polymeric chain, we choose the temperature (T o ) when the major polymer degradation began [20].…”

Section: Hybrids Obtained With Tip and Triethoxysilane Derivatesmentioning

confidence: 99%

“…As a clue of the thermal stability of the polymeric chain, we choose the temperature (T o ) when the major polymer degradation began [20].…”

Section: Hybrids Obtained With Tip and Triethoxysilane Derivatesmentioning

confidence: 99%

“…The thermal stability, assigned to T o , decreases with increasing concentration of allylic monomer. The first thermal degradation stage of PVAc is represented by removing of substitute structural units [20]. The acetoacetate substitute is certainly much vulnerable at air heating.…”

Section: Hybrids Obtained From Tip and Alacac Copolymersmentioning

confidence: 99%

“…In both cases T o value is higher than for corresponding hybrids and VAc-AlAcAc copolymers (Table 4). Very interesting is the fact that the difference between T o (40 differences is the different thermal degradation mechanism of these polymers [20] and the catalytic effect of Ti atoms vs. PVAc chains.…”

Section: Hybrids Obtained From Tip and Alacac Copolymersmentioning

confidence: 99%

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Polymer-Titanium hybrids obtained by radical polymerization and Sol-Gel process

et al. 2005

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The possibility to prepare hybrids made by poly(vinyl acetate) (PVAc), poly(methyl methacrylate) (PMMA) and/or poly(ethyl acrylate) (PEtA) with TiO 2 was studied. The processes of polymer formation -radical polymerization and sol-gel process for inorganic network -were achieved simultaneously. Due to a high reactivity of titanium isopropoxide (TIP) in the sol-gel process, a complexant comonomer, allyl acetoacetate (AlAcAc), was used. Covalent bonds between polymer and inorganic chains were obtained by addition of trialkoxysilane derivates with vinyl (VTES) or methacryloyl (MPTS) groups. The presence of TIP inhibits the radical polymerization of vinyl acetate (VAc). The PVAc-TiO 2 hybrids were produced by the sol-gel process of TIP in the presence of pre-obtained PVAc. Except for VTES and MPTS, trialkoxysilane derivates with methyl (MeTES), octyl (OTES) and phenyl (PTES) groups were used. The thermal stability of hybrids is strongly affected by TiO 2 presence and by the type of trialkoxysilane derivates. The thermal stability of PVAc hybrids decreases in the presence of TiO 2 inorganic network. The glass transition temperature of polymers increases in the presence of the inorganic network.

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Synthesis and Characterization of a Diblock Copolymer of Methyl Methacrylate and Vinyl Acetate by Successive Photo-Induced Charge Transfer Polymerization Using Ethanolamine as the Parent Compound

Guo

Yang

Huang

et al. 2001

Macromol. Rapid Commun.

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Communication: A diblock copolymer consisting of poly(methyl methacrylate) (PMMA) and poly(vinyl acetate) (PVAc) with hydroxyl group at one end is prepared by successive charge transfer polymerization (CTP) under UV irradiation at room temperature using ethanolamine and benzophenone as a binary initiation system. The diblock copolymer PMMA‐b‐PVAc could be selectively hydrolyzed to the block copolymer of poly(methyl methacrylate) and poly(vinyl alcohol) (PVA) using sodium ethoxide as the catalyst. Both copolymers, PMMA‐b‐PVAc and PMMA‐b‐PVA, are characterized in detail by means of FTIR and 1H NMR spectroscopy, and GPC. The effect of the solvent on CTP and the kinetics of CTP are discussed.

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Thermal and photochemical stability of poly(methyl methacrylate) and its blends with poly(vinyl acetate)

Cited by 17 publications

References 34 publications

Photochemistry for the Synthesis of Noble Metal Nanoparticles

Photochemistry for the Synthesis of Noble Metal Nanoparticles

Polymer-Titanium hybrids obtained by radical polymerization and Sol-Gel process

Synthesis and Characterization of a Diblock Copolymer of Methyl Methacrylate and Vinyl Acetate by Successive Photo-Induced Charge Transfer Polymerization Using Ethanolamine as the Parent Compound

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