Graft copolymerization of vinyl monomers on modified cottons. XVIII. Grafting of methyl methacrylate and acrylonitrile on cotton treated with <i>N</i>‐methylol crosslinking agents using tetravalent cerium as initiator

Hebeish, A.; El‐Rafie, M. M.; El‐Kashouti, M. A.; El-Sisi, F.

doi:10.1002/app.1981.070261203

Cited by 15 publications

(1 citation statement)

References 32 publications

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“…The graft copolymerization of various alkylacrylates onto cellulose using different initiating agents 1-5 has been reported frequently, but investigations for grafting of ethyl acrylate monomer onto cellulose is limited . The high affinity of ethyl acrylate for grafting onto cellulose in comparison to methyl acrylate and methyl methacrylate has been attributed to the length of the ester alkyl group, which has increased its reactivity for grafting onto cellulose through electron-pumping capacity of ester ethyl group. The formation of small amount of homopolymer during graft copolymerization of ethyl acrylate is an indication that ethyl acrylate has more affinity for grafting in comparison to the formation of homopolymer.…”

Section: Resultsmentioning

confidence: 99%

Graft Copolymerization of Ethyl Acrylate onto Cellulose Using Ceric Ammonium Nitrate as Initiator in Aqueous Medium

2002

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Ceric ammonium nitrate (CAN) in the presence of nitric acid has been used as efficient initiator for graft copolymerization of the ethyl acrylate onto cellulose at 35.0 +/- 0.1 degrees C. Graft copolymerization of ethyl acrylate onto cellulose has taken place through the radical initiation process. The graft yield and other grafting parameters have been evaluated by varying concentration of ethyl acrylate from 2.5 x 10(-1) to 15.0 x 10(-1) mol dm(-3) and ceric ammonium nitrate from 5.0 x 10(-3) to 25.0 x 10(-3) mol dm(-3) at constant concentration of the nitric acid (8.0 x 10(-2) mol dm(-3)). The rate of graft copolymerization has shown 1.5 order with respect to the concentration of the ceric ammonium nitrate. The graft copolymerization data obtained at different temperatures were used to calculate the energy of activation, which has been found to be 28.9 kJ mol(-1) within the temperature range from 20 to 50 degrees C. The effect of addition of cationic and anionic surfactants on graft copolymerization has also been studied. On the basis of the experimental observations, reaction steps have been proposed and a suitable rate expression for graft copolymerization has been derived.

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Section: Resultsmentioning

confidence: 99%

Graft Copolymerization of Ethyl Acrylate onto Cellulose Using Ceric Ammonium Nitrate as Initiator in Aqueous Medium

2002

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Graft copolymerization of methyl methacrylate onto jute fibers. Studies on vanadium (V)‐cyclohexanol redox system

Mohanty

Singh

Misra

1987

Angew. Makromol. Chem.

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Graft copolymerization of methyl methacrylate (MMA) onto natural jute (chemically modified) was studied using v+ -cyclohexanol redox initiator system. The effects of time, concentration of metal ion (V+), monomer (MMA), substrate, amount of jute fibers, temperature, and acid concentration on graft yield have been studied. The effects of some organic solvents and inorganic salts on graft yield have also been studied. A grafting mechanism is proposed and an expression has been derived for the reaction rate. Grafting has improved the thermal stability and the light fastness of jute fibers dyed with basic dyes. IR spectra of the natural jute (chemically modified) and grafted jute have been taken. More than 170% graft yield could be achieved with the present system. ZUSAMMENFASSUNG:Es wurde die Pfropfcopolymerisation von Methylmethacrylat auf Naturjute (chemisch modifiziert) unter Verwendung von + -Cyclohexanol als Redoxinitiatorsystem untersucht. Die Einfliisse von Zeit, Metallionenkonzentration (v + ), Monomerem (MMA), Substrat, Anteil an Jutefasern, Temperatur und Stiurekonzentration auf die Pfropfausbeute sind bestimmt worden. Es wurde auch der EinfluB einiger organischer Ldsungsmittel und anorganischer Salze auf die Pfropfausbeute untersucht. Es wird ein Mechanismus fiir die Pfropfreaktion angegeben und das Geschwindigkeitsgesetz abgeleitet. Das Pfropfen hat die thermische Stabilitat und die Lichtechtheit der Jutefasern, die mit basischen Farbstoffen gefiirbt sind, verbessert. IR-Spektren von Naturjute (chemisch modifiziert) und gepfropfter Jute wurden aufgenommen. Eine Pfropfausbeute von mehr als 170% konnte mit diesem System erreicht werden.

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The study of rapid curing crease‐resistant processing on cotton fabrics. II. Effect of poly(ethylene glycol) on physical properties of processed fabrics

Shih¹,

Huang²

2002

J of Applied Polymer Sci

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This study aimed to examine the effects of the addition of poly(ethylene glycol) (PEG) on the physical properties of processed cotton fabrics in a rapid heatcuring crease-resistant process. Our results show that this addition influences the moisture absorbency, crease resistance in both dry and wet conditions, and tensile strength preservation rate of the processed fabrics. Moreover, with such addition, the use of higher temperature in the process would enhance the moisture absorbency and dry-wet crease resistance but reduce the tensile strength preservation rate. The optimum condition for processing cotton fabric is to use PEG with a molecular weight of 1000 at a concentration of 10%, heated at 200°C for 30 s.

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Graft copolymerization of vinyl monomers on modified cottons. XVIII. Grafting of methyl methacrylate and acrylonitrile on cotton treated with N‐methylol crosslinking agents using tetravalent cerium as initiator

Cited by 15 publications

References 32 publications

Graft Copolymerization of Ethyl Acrylate onto Cellulose Using Ceric Ammonium Nitrate as Initiator in Aqueous Medium

Graft Copolymerization of Ethyl Acrylate onto Cellulose Using Ceric Ammonium Nitrate as Initiator in Aqueous Medium

Graft copolymerization of methyl methacrylate onto jute fibers. Studies on vanadium (V)‐cyclohexanol redox system

The study of rapid curing crease‐resistant processing on cotton fabrics. II. Effect of poly(ethylene glycol) on physical properties of processed fabrics

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