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| Abstract: | Low-density polyethylene, (LDPE) was mixed with two grades of tapioca starch–lowgrade and high-grade. Various compositions were prepared and mechanical and thermal studies performed. The biodegradability of these samples was checked using a culture medium containing Vibrios (an amylase-producing bacteria), which was isolated from a marine benthic environment. The soil burial test and reprocessability of these samples were checked. The studies on biodegradability show that these blends are partially biodegradable. These low-density polyethylene-starch blends are reprocessable without sacrificing much of their mechanical properties |
| Description: | International Journal of Polymeric Materials, 58:257–266, 2009 |
| URI: | http://dyuthi.cusat.ac.in/purl/4017 |
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| Biodegradabilit ... lase-Producing Vibrios.pdf | (333.7Kb) |
| Abstract: | Ionic polymers (ionomers) with interesting characteristics are emerging as important commercial polymers. Ionomers have the unique ability to behave as cross-linked materials at ambient temperatures and to melt and flow at elevated temperatures like thermoplastics. The complex permittivity and conductivity of a class of ionomers at microwave frequencies are determined using the cavity perturbation technique and the results are presented. |
| URI: | http://dyuthi.cusat.ac.in/purl/2984 |
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| Dyuthi-P00421.pdf | (128.1Kb) |
| Abstract: | Low-density polyethylene was mixed with dextrin having different particle sizes (100, 200 and 300 mesh). Various compositions were prepared and their mechanical properties were evaluated and thermal studies have been carried out. Biodegradability of these samples has been checked using liquid culture medium containing Vibrios (an amylase producing bacteria), which were isolated from marine benthic environment. Soil burial test was done and reprocessability of these samples was evaluated. The results indicate that the newly prepared blends are reprocessable without sacrificing much of their mechanical properties. The biodegradability tests on these blends indicate that these are partially biodegradable |
| Description: | Polymer-Plastics Technology and Engineering, 48: 602–606, 2009 |
| URI: | http://dyuthi.cusat.ac.in/purl/4018 |
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| Effect of Amyla ... thylene-Dextrin Blends.pdf | (417.1Kb) |
| Abstract: | High styrene rubber ionomers were prepared by sulfonating styrene–butadiene rubber of high styrene content (high styrene rubber) in 1,2-dichloroethane using acetyl sulfate reagent, followed by neutralization of the precursor acids using methanolic zinc acetate. The ionomers were characterized using X-ray fluorescence spectroscopy, Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance spectroscopy (NMR), dynamic mechanical analysis (DMA), and also by the evaluation of mechanical properties. The FTIR studies of the ionomer reveal that the sulfonate groups are attached to the benzene ring. The NMR spectra give credence to this observation. Results of DMA show an ionic transition (Ti) in addition to glass–rubber transition (Tg). Incorporation of ionic groups results in improved mechanical properties as well as retention of properties after three cycles of processing |
| Description: | Journal of Applied Polymer Science, Vol. 85, 2294–2300 (2002) |
| URI: | http://dyuthi.cusat.ac.in/purl/4658 |
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| High Styrene–Ru ... ermoplastic Elastomers.pdf | (150.9Kb) |
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