The effect of additives on the enhancement of methyl methacrylate grafting to cellulose in the presence of UV and ionising radiation

Viengkhou, Visay; Ng, Loo‐Teck; Garnett, J. L.

doi:10.1016/s0969-806x(97)00001-7

Cited by 33 publications

(6 citation statements)

References 14 publications

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“…The thermal stability of the films is of the following order: S 3 (241°C) > S 2 (235°C) > S 1 (222°C) > SA (215°C). This order is the same as that of their crystallinities, indicating that their crystalline domains and the intermolecular interaction enhanced the thermal stability of the films [21].…”

Section: Characterization Of Pure and Silane-treated Sa Films By Ftirmentioning

confidence: 61%

“…At a low concentration, the silane monomer promotes a reaction with the help of the photoinitiator, leading to a network polymer structure through the hydroxyl group of silane with the aid of UV radiation. With increase in silane concentration, more free radical was produced, with the consequence of a faster rate of formation of three-dimensional networks, causing restricted mobility [21]. The decrease in PL values at higher silane concentrations may be due to the fact that the radical-radical recombination process may be dominating, thus creating a homopolymer, rather than silane/SA backbone reaction, where the hydroxyl group of SA may be reacting with Si free radicals in the silane monomer.…”

Section: Plmentioning

confidence: 99%

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Preparation and properties of sodium alginate films

Zaman

Beg

2013

Journal of Polymer Engineering

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Sodium alginate (SA) films were prepared by casting from methanol (MeOH) solutions and their tensile properties, like tensile strength (TS) and elongation at break (Eb %), were monitored. The resulting films of SA were photocured with vinyltriethoxysilane [H 2 C = CH-Si-(OC 2 H 5 ) 3 ] in order to improve the tensile properties. Several acrylic monomers of different functionalities as additives (2%), like ethyl acrylate (EA), 2-hydroxyethyl acrylate (2-HEA), and tripropylene glycol diacrylate (TPGDA), were incorporated with silane with the aid of UV radiation. Further analyses of the prepared films were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and a TS test. FTIR studies indicate that there are intermolecular hydrogen bonding interactions, i.e., -OH·····O = C in silane/SA blends. This blend films also exhibited the higher thermal stability and improved the tensile properties of the films. Degradation of SA by UV spectrometry induces time-dependent degradation.

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Section: Characterization Of Pure and Silane-treated Sa Films By Ftirmentioning

confidence: 61%

Section: Plmentioning

confidence: 99%

Preparation and properties of sodium alginate films

Zaman

Beg

2013

Journal of Polymer Engineering

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“…. The macroradical provides the site for grafting, and the hydroxy radical can initiate homopolymerization of the monomers M. The scheme of this mechanism was discussed in numerous papers (e.g., in [15]) and can be represented as follows: Homopolymerization of the monomers can be suppressed by addition of transition metal salts [16,17], which increases the degree of grafting:…”

Section: Methodsmentioning

confidence: 99%

Radiation-Induced Graft Polymerization of Glycidyl Methacrylate onto Nonwoven Polypropylene

Bondar¹,

Kim²,

Lim³

2005

Russ J Appl Chem

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“…Urea was used at different concentrations (0.5-2%) in HDDA þ MeOH systems, and it was observed that among the different concentrations the one with 1% urea produced the best results. This can lead to an increase in monomer concentration at a grafting site and thus enhance reactivity at that site [20] . The highest polymer loading value (25%) is achieved with the fourth pass of radiation.…”

Section: Effect Of Additive Ureamentioning

confidence: 99%

Role of Urea on the Physico-Mechanical and Degradable Properties of Mercerized and Acid Hydrolyzed Coir (Cocos nucifera) Fibers Photocured with 1,6-Hexanediol Diacylate

Khan

Taslima

Mustafa

2005

Polymer-Plastics Technology and Engineering

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Coir fibers were modified with 1,6-hexanediol diacrylate (HDDA) by using ultraviolet (UV) radiation. Concentration of HDDA, soaking time, and radiation dose were optimized and found to be 30% HDDA in methanol along with photoinitiator Irgacure-500 (2%) and 120 min of soaking time the better performance registered as the optimum conditions, where polymer loading (PL) was 17% and tensile strength (TS) was 50%. Urea of different concentrations (0.5-2%) was incorporated with 30% HDDA to monitor its effect on the properties and 1% urea produced the enhanced PL (25%) and TS (82%). For the improvement of the properties, the fibers were subjected to surface treatment with alkali (5% potassium hydroxide) at various mercerizing times in hot and normal conditions. Among all the mercerized fibers, fibers treated with hot alkali for 6 h and cured under optimized condition demonstrated the maximum enhancement of PL (35.5%) and TS (130%). The fibers were also subjected to acid hydrolysis for different times with different acid (H 2 SO 4 ) concentrations. Again the effect of urea (1%) on the properties of the pretreated fibers was scrutinized. Water uptake and degradable properties of the treated and virgin fibers were performed.

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The effect of additives on the enhancement of methyl methacrylate grafting to cellulose in the presence of UV and ionising radiation

Cited by 33 publications

References 14 publications

Preparation and properties of sodium alginate films

Preparation and properties of sodium alginate films

Radiation-Induced Graft Polymerization of Glycidyl Methacrylate onto Nonwoven Polypropylene

Role of Urea on the Physico-Mechanical and Degradable Properties of Mercerized and Acid Hydrolyzed Coir (Cocos nucifera) Fibers Photocured with 1,6-Hexanediol Diacylate

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