Thermal behavior of chitosan/natural rubber latex blends TG and DSC analysis

Rao, Vijayalakshmi; Johns, Jobish

doi:10.1007/s10973-007-8854-5

Cited by 84 publications

(47 citation statements)

References 14 publications

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“…The TGA technique is useful to study complex systems like polymer blends [15,16] and nanocomposites [17,18]. The thermal decomposition of the nanocomposites was studied for a wide range of compositions by systematically changing the nature of the macromolecule (polymer) or the nanofiller.…”

Section: Thermogravimetric Analysis (Tga)mentioning

confidence: 99%

Preparation and Characterization of K-Carrageenan/Nanosilica Biocomposite Film

Rane

Savadekar

Kadam

et al. 2014

Journal of Materials

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The purpose of this study is to improve the performance properties of K-carrageenan (K-CRG) by utilizing nanosilica (NSI) as the reinforcing agent. The composite films were prepared by solution casting method. NSI was added up to 1.5% in the K-CRG matrix. The prepared films were characterized for mechanical (tensile strength, tensile modulus, and elongation at break), thermal (differential scanning calorimetry, thermogravimetric analysis), barrier (water vapour transmission rate), morphological (scanning electron microscopy), contact angle, and crystallinity properties. Tensile strength, tensile modulus, and crystallinity were found to have increased by 13.8, 15, and 48% whereas water vapour transmission rate was found to have decreased by 48% for 0.5% NSI loaded K-CRG composite films. NSI was found to have formed aggregates for concentrations above 0.5% as confirmed by scanning electron microscopy. Melting temperature, enthalpy of melting, and degradation temperature of K-CRG increased with increase in concentration of NSI in K-CRG. Contact angle also increased with increase in concentration of NSI in K-CRG, indicating the decrease in hydrophilicity of the films improving its water resistance properties. This knowledge of the composite film could make beneficial contributions to the food and pharmaceutical packaging applications.

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Section: Thermogravimetric Analysis (Tga)mentioning

confidence: 99%

Preparation and Characterization of K-Carrageenan/Nanosilica Biocomposite Film

Rane

Savadekar

Kadam

et al. 2014

Journal of Materials

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“…involve the utilization of natural rubber or its derivatives and chitosan [8][9][10][11][12][13][14][15][16]. Of special interest to our current work, Lertwattanaseri et al [13] reported the preparation of a novel model case of bionanocomposites comprising nanofibrous chitosan bonded to the backbone of epoxidized natural rubber (ENR) via both amino and hydroxyl groups.…”

mentioning

confidence: 98%

Preparation and characterization of biopolymers comprising chitosan-grafted-ENR via acid-induced reaction of ENR50 with chitosan

Haris¹,

Raju²

2014

Express Polym. Lett.

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This paper describes the first detailed tailored-approach for the preparation of biopolymers comprising chitosan (CTS) grafted onto the backbone of epoxidized natural rubber (CTS-g-ENR). In a typical experiment, appropriate amount of CTS and AlCl3•6H2O was added to a specified amount of ENR50 (ENR with about 50% epoxy content) dissolved in a dual-solvent consisting of 1,4-dioxane and water (97.5:2.5% v/v) and the resulting mixture refluxed with continuous stirring for 6 hours. Nuclear magnetic resonance (NMR) spectral analysis of a biocomposite, CTS-g-ENR-P1, revealed that its epoxy content is 22.36% which is considerably lower than 44.93% as determined for ENR50-control (ENR50 derivative obtained under similar experimental condition but in the absence of CTS). This means that the grafting of CTS onto the backbone of ENR had occurred. The revelation is affirmed by the presence of the characteristic absorption bands of CTS and ENR, and the appearance of new bands at 1219, 902 and 733 cm–1 in the Fourier transform infrared (FTIR) spectrum of CTS-g-ENR-P1. Further evidence that CTS had been successfully grafted onto the backbone of ENR can be deduced and described in this paper from the data obtained by means of Differential Scanning Calorimetric analysis, Thermogravimetric analysis and Variable Pressure Scanning Electron Microscopy

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“…Around 375 8C there is the thermal decomposition of most of the organic components of the rubber matrix, i.e. poly-isoprene molecules, proteins, aldehydes, ketones and carboxylic acids [14][15][16]. At higher temperature there is the onset of the degradation of the highly reticulated polymer molecules [15].…”

Section: Degradation In N 2 Atmospherementioning

confidence: 99%

“…At higher temperature there is the onset of the degradation of the highly reticulated polymer molecules [15]. The peak at around 700 8C is attributable to the concurrent degradation of rubber and of some inorganic additives [14,16].…”

Section: Degradation In N 2 Atmospherementioning

confidence: 99%