Syhthesis of Casein Graft Poly(acrylonitrile)

Somanathan, N.; Jeevan, R Ganesh; Sanjeevi, R.

doi:10.1295/polymj.25.939

Cited by 9 publications

(6 citation statements)

References 22 publications

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“…Infrared studies of grafted casein also show the variation of aromatic amino acid contents due to grafting. 42 Comparison of the moisture sorption level of Cag-AN and Ca-g-AN-co-nBMA does not show any characteristic variation in the sorption level. These results suggest that the added nBMA chains do not characteristically change the moisture sorption level of AN-grafted casein.…”

Section: Effect Of Relative Humiditymentioning

confidence: 89%

Effect of environmental factors on the mechanical properties of grafted casein films: Influence of humidity and biaxial orientation

Somanathan

1996

J. Appl. Polym. Sci.

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SYNOPSISCasein was grafted with acrylonitrile and with a binary mixture of acrylonitrile and n-butyl methacrylate. The influence of absorbed moisture a t different relative humidities on the stress-strain characteristics was studied. Tensile properties were very much affected by the absorbed moisture in both cases. The effect produced by water was very much pronounced in the case of casein grafted with acrylonitrile. Although the absorbed moisture level was the same in both grafted caseins, due to the influence of n-butyl methacrylate chains, which reduces the T8 of the film, the tensile properties and fracture behavior were very different from the films of casein grafted with acrylonitrile. Due to the application of stress in the lateral direction, tensile strength and elongation a t break in the longitudinal direction was reduced. Both systems show that after an applied lateral stress of 5 X lo-' Mpa the variation of stress and strain was not characteristic and the value levels off after that level. 0 1996

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Section: Effect Of Relative Humiditymentioning

confidence: 89%

Effect of environmental factors on the mechanical properties of grafted casein films: Influence of humidity and biaxial orientation

Somanathan

1996

J. Appl. Polym. Sci.

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“…Table I shows that grafting tremendously reduces the absorbed moisture level, which suggests that polar sites were considerably reduced due to grafting. 42 Comparison of the moisture sorption level of Cag-AN and Ca-g-AN-co-nBMA does not show any characteristic variation in the sorption level. Infrared studies of grafted casein also show the variation of aromatic amino acid contents due to grafting.…”

Section: Effect Of Relative Humiditymentioning

confidence: 89%

Effect of environmental factors on the mechanical properties of grafted casein films: Influence of humidity and biaxial orientation

Somanathan

1996

J. Appl. Polym. Sci.

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“…The film strengths were almost linearly proportional to the binary monomer concentrations, and the elongations were inversely linearly proportional to the binary monomer concentrations. The effect of acrylonitrile monomer concentrations on grafting efficiency was further evaluated between 0.8 and 3.0 mol/L . The optimum monomer concentration for best percent grafting and grafting efficiency was 2.0 mol/L.…”

Section: Graftingmentioning

confidence: 99%

“…The effect of acrylonitrile monomer concentrations on grafting efficiency was further evaluated between 0.8 and 3.0 mol/L. 59 The optimum monomer concentration for best percent grafting and grafting efficiency was 2.0 mol/L.…”

Section: Acrylonitrilementioning

confidence: 99%

Treatments of protein for biopolymer production in view of processability and physical properties: A review

Zhang

et al. 2016

J of Applied Polymer Sci

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The development of bio-based polymers from proteins has gained attention for their large availability and renewable and biodegradable nature. However, protein-based plastics have limited commercial applications because of several drawbacks, such as poor processability, brittleness, moisture sensitivity, and inferior mechanical and thermal properties. Extensive studies have been conducted to solve or ameliorate these issues by pretreatment or modification of proteins or protein-derived biopolymers before or during wet processing or dry processing at elevated temperatures. This review provides an overview of research efforts conducted in the area of physical and chemical treatment of proteins to achieve better processability, mechanical properties, and other physical performance based on a literature review in this subject. INTRODUCTIONBiopolymers derived from agricultural resources such as wool, cotton, leather, and silk have been extensively used by humans for a long time. Industrial use of agricultural commodities for fuels and consumer products began in the 1920s. They were soon replaced by petroleum-based chemicals after World War II because these synthetic polymers were cheaper, more durable, and more versatile. Advances in petroleum-based fuels and polymers have benefited mankind in numerous ways. However, sustainability of their production and use has become a societal concern. Besides, petroleum resources are finite, and their prices are likely to continue to rise in the future. The disposal of petroleum-based plastic has also been causing environmental concerns. 1 Since the early 1990s, the use of renewable biopolymers as a substitute for nonbiodegradable petrochemical-based polymers has again attracted considerable attention because of their environmental benefits such as renewability and biodegradability. Nowadays, natural polymers can even be tailored to meet specific needs.Protein is one of three main categories of renewable biopolymers aside from polysaccharides and polynucleotides that are derived from plant or animal resources. Plant proteins that can be used for bio-based plastics include soy protein, corn zein, wheat protein, cottonseed protein, and sunflower protein. Animal proteins such as blood meal, gelatin and collagen, keratin and feather quills, egg protein, whey protein, and meat and bone meal can also be used as a feedstock for such bio-based polymers. 2 Despite their environmental friendliness, proteinbased biopolymers have many shortcomings like lower mechanical properties when compared to petroleum-based polymers. 3 Due to the hydrogen bonds between C@O and NH groups, protein-based polymers have poor processability and exhibit high sensitivity to moisture. As a result, the protein-based polymers are very difficult to process without plasticizers or pretreatment. To date, overcoming these shortcomings of proteinbased bioplastics has proven difficult. Numerous methods have been investigated, including physical treatment, denaturation of the original protein in crystalline form, cleava...

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Syhthesis of Casein Graft Poly(acrylonitrile)

Cited by 9 publications

References 22 publications

Effect of environmental factors on the mechanical properties of grafted casein films: Influence of humidity and biaxial orientation

Effect of environmental factors on the mechanical properties of grafted casein films: Influence of humidity and biaxial orientation

Effect of environmental factors on the mechanical properties of grafted casein films: Influence of humidity and biaxial orientation

Treatments of protein for biopolymer production in view of processability and physical properties: A review

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