Factors affecting creaming efficiency of bio-based polymers, vulcanization and mechanical properties of creamed skim rubber

Kongkaew, Chaveewan; Dokkhan, Chotiros; Pattanawanidchai, Sirichai; Chaikumpollert, Oraphin; Loykulnant, Surapich

doi:10.1016/j.biombioe.2012.08.021

Cited by 12 publications

(5 citation statements)

References 8 publications

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“…Efforts to replace petroleum-based plastics are motivated by numerous environmental, technological, and economic problems resulting from the finite supply and increasing cost of crude oil and the environmental damage caused by heavy use of fossil carbon and disposal of non-biodegradable petroleum-based products. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] Bio-based polymers have been used extensively in a wide range of industrial applications, such as textiles, resins, and rigid or flexible foams. The biodegradability and biocompatibility of these important polymers make them excellent candidates for medical applications such as drug delivery carriers and bioresorbable scaffolds for tissue engineering.…”

Section: Introductionmentioning

confidence: 99%

Biodegradation behavior of bacterial-based polyhydroxyalkanoate (PHA) and DDGS composites

et al. 2014

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The extensive use of plastics in agriculture has increased the need for development and implementation of polymer materials that can degrade in soils under natural conditions. The biodegradation behavior in soil of polyhydroxyalkanoate (PHA) composites with 10 wt% distiller's dried grains with solubles (DDGS) was characterized and compared to pure PHA over 24 weeks. Injectionmolded samples were measured for degradation weight loss every 4 weeks, and the effects of degradation times on morphological, thermomechanical, and viscoelastic properties were evaluated by scanning electron microscopy (SEM), dynamic mechanical analysis (DMA), and small-amplitude oscillatory shear flow experiments. Incorporation of DDGS had a strong effect on biodegradation rate, mechanical properties, and production cost. Material weight loss increased linearly with increasing biodegradation time for both neat PHA and the PHA/DDGS 90/10 composites. Weight loss after 24 weeks was approximately six times greater for the PHA/DDGS 90/10 composites than for unaltered PHA under identical conditions. Rough surface morphology was observed in early biodegradation stages (≥8 weeks). With increasing biodegradation time, the composite surface eroded and was covered with well-defined pits that were evenly distributed, giving an areolate structure. Zero shear viscosity, T g , gelation temperature, and cold crystallization temperature of the composites decreased linearly with increasing biodegradation time. Addition of DDGS to PHA establishes mechanical and biodegradation properties that can be utilized in sustainable plastics designed to end their lifecycle as organic matter in soil. Our results provide information that will guide development of PHA composites that fulfill application requirements then degrade harmlessly in soil.

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Section: Introductionmentioning

confidence: 99%

Biodegradation behavior of bacterial-based polyhydroxyalkanoate (PHA) and DDGS composites

et al. 2014

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“…Increasing farm yield will eventually reduce the rate of deforestation. MTEC’s material research in post-harvesting includes work on prolonging the life and preserving the quality of latex, a high-efficiency coagulation process, and an eco-friendly coupling agent for rubber compounds [16–18]. …”

Section: Resource Utilizationmentioning

confidence: 99%

Material research for environmental sustainability in Thailand: current trends

Niranatlumpong

Ramangul

Dulyaprapan

et al. 2015

Science and Technology of Advanced Materials

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This article covers recent developments of material research in Thailand with a focus on environmental sustainability. Data on Thailand’s consumption and economic growth are briefly discussed to present a relevant snapshot of its economy. A selection of research work is classified into three topics, namely, (a) resource utilization, (b) material engineering and manufacturing, and (c) life cycle efficiency. Material technologies have been developed and implemented to reduce the consumption of materials, energy, and other valuable resources, thus reducing the burden we place on our ecological system. At the same time, product life cycle study allows us to understand the extent of the environmental impact we impart to our planet.

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“…The effect of urea on the mechanical and physical properties of radiationvulcanized natural rubber latex (RVNRL) films has been reported by Rahman et al [11] Recently, the mechanical performance of NR influenced by the use of TiO 2 and creaming agents has been studied. [12,13] The effect of transition metals on the physico-mechanical properties of RVNRL films has not yet been reported. In the present study, radiation vulcanization of NR latex was carried out at various radiation doses in the presence of transition metals of different concentrations, with an aim to improve the mechanical and physical properties of the rubber films.…”

Section: Introductionmentioning

confidence: 98%

Addition of Transition Metals to Improve Physico-Mechanical Properties of Radiation-Vulcanized Natural Rubber Latex Films

Rahman

Hossain²,

Alam

et al. 2013

International Journal of Polymer Analysis and Characterization

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The effect of transition metals as a promoter of physico-mechanical properties of radiation-vulcanized natural rubber latex (RVNRL) films was investigated. RVNRL films were prepared by the addition of transition metals (Fe, Mn, etc.) of different concentrations (0-30 ppm) in natural rubber (NR) latex and irradiated with various radiation doses (0-20 kGy). The concentrations of metal ions and radiation doses were optimized and found to be 20 ppm and 12 kGy, respectively. Tensile strength, tear strength, and cross-linking density of the irradiated rubber films were increased with increasing concentration of metal ions as well as radiation doses. The mechanical properties of the films were enhanced by approximately 20% at the optimum conditions. In contrast, elongation at break, permanent set, and swelling ratio of the films were decreased under the same conditions. The comparative effect of metal ions can be explained by Fajan's rules, reported in this article.

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Factors affecting creaming efficiency of bio-based polymers, vulcanization and mechanical properties of creamed skim rubber

Cited by 12 publications

References 8 publications

Biodegradation behavior of bacterial-based polyhydroxyalkanoate (PHA) and DDGS composites

Biodegradation behavior of bacterial-based polyhydroxyalkanoate (PHA) and DDGS composites

Material research for environmental sustainability in Thailand: current trends

Addition of Transition Metals to Improve Physico-Mechanical Properties of Radiation-Vulcanized Natural Rubber Latex Films

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