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Journal of polymers and the environment
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Publication year rev
7990-2010
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2010 v.18 no.1
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1. Block Copolymers Containing (R)-3-Hydroxybutyrate and Isosorbide Succinate or (S)-Lactic Acid Mers
- Author:
- Casarano, Romeu; Petri, Denise F. S.; Jaffe, Michael; Catalani, Luiz H.
- Source:
- Journal of polymers and the environment 2010 v.18 no.1 pp. 33-44
- ISSN:
- 1566-2543
- Subject:
- biodegradation; carbon; composite polymers; crystal structure; matrix-assisted laser desorption-ionization mass spectrometry; nuclear magnetic resonance spectroscopy; solubility; stable isotopes; thermal analysis; thermal stability; transesterification
- Abstract:
- ... A new aliphatic block copolyester was synthesized in bulk from transesterification techniques between poly((R)-3-hydroxybutyrate) (PHB) and poly(isosorbide succinate) (PIS). Additionally, other two block copolyesters were synthesized in bulk either from transesterification reactions involving PHB and poly(l-lactide) (PLLA) or from ring-opening copolymerization of l-lactide and hydroxyl-terminated ...
- DOI:
- 10.1007/s10924-009-0157-4
- https://doi.org/10.1007/s10924-009-0157-4
- Author:
- Grillo, Renato; de Melo, Nathalie F. S.; de Lima, Renata; Lourenço, Roberto Wagner; Rosa, André Henrique; Fraceto, Leonardo Fernandes
- Source:
- Journal of polymers and the environment 2010 v.18 no.1 pp. 26-32
- ISSN:
- 1566-2543
- Subject:
- Lactuca sativa; agrochemicals; atrazine; biodegradability; differential scanning calorimetry; genotoxicity
- Abstract:
- ... Polyhydroxybutyrate-co-hydroxyvalerate microspheres (PHBV-MS) were prepared as a delivery system for the herbicide atrazine (ATZ). Characterization of the system included investigation of in vitro release properties and genotoxicity. ATZ − PHBV-MS particle diameters showed a size distribution range of 1-13 μm. Differential scanning calorimetry analyses indicated that ATZ was associated with the PH ...
- DOI:
- 10.1007/s10924-009-0153-8
- https://doi.org/10.1007/s10924-009-0153-8
- Author:
- Pérez, J. M.; Vilas, J. L.; Laza, J. M.; Arnáiz, S.; Mijangos, F.; Bilbao, E.; León, L. M.
- Source:
- Journal of polymers and the environment 2010 v.18 no.1 pp. 71-78
- ISSN:
- 1566-2543
- Subject:
- extrusion; recycling; tensile strength; thermal properties; weathering
- Abstract:
- ... The feasibility of reprocessing has been investigated as a possible alternative for acrylonitrile-butadiene-styrene terpolymer (ABS) recycling. Up to 10 reprocessing cycles have been performed by both extrusion and injection techniques and their effect on thermal and mechanical properties have been studied. Moreover, the effect of the combined reprocessing and accelerated weathering has been analy ...
- DOI:
- 10.1007/s10924-009-0154-7
- https://doi.org/10.1007/s10924-009-0154-7
- Author:
- Pathak, Tara Sankar; Yun, Jung-Ho; Lee, Se-Jong; Baek, Dae-Jin; Paeng, Ki-Jung
- Source:
- Journal of polymers and the environment 2010 v.18 no.1 pp. 45-56
- ISSN:
- 1566-2543
- Subject:
- 1-propanol; Fourier transform infrared spectroscopy; Undaria pinnatifida; calcium alginate; ethanol; heat; methanol; polymers; porosity; solvents; thermal analysis; thermal stability; weight loss
- Abstract:
- ... Alginates, extracted from algae are linear unbranched polymers containing β-(1→4)-linked d-mannuronic acid (M) and α-(1→4)-linked l-guluronic acid (G) residues. The conversion of alginic acid into the metal alginate is confirmed using FTIR spectroscopy. Asymmetric and symmetric stretching of free carboxyl group present in metal alginate occurs almost at the same position in various solvent composi ...
- DOI:
- 10.1007/s10924-009-0156-5
- https://doi.org/10.1007/s10924-009-0156-5
- Author:
- Ionescu, Mihail; Petrović, Zoran S.; Wan, Xianmei
- Source:
- Journal of polymers and the environment 2010 v.18 no.1 pp. 1-7
- ISSN:
- 1566-2543
- Subject:
- active ingredients; catalysts; ethoxylation; hydrogen; inorganic acids; polyols; polyurethanes; soybean oil; soybeans; temperature; thiols; triacylglycerols
- Abstract:
- ... Soybean polyols prepared by ring opening reactions of epoxidized soybean oil with hydrogen active compounds (water, alcohols, organic or inorganic acids, thiols, hydrogen etc.) have a low reactivity in the reaction with isocyanates because the hydroxyl groups are secondary. This paper presents a simple and convenient method to increase the reactivity of soybean polyols with secondary hydroxyl grou ...
- DOI:
- 10.1007/s10924-007-0070-7
- https://doi.org/10.1007/s10924-007-0070-7
- Author:
- Ashori, Alireza
- Source:
- Journal of polymers and the environment 2010 v.18 no.1 pp. 65-70
- ISSN:
- 1566-2543
- Subject:
- fiber content; flour; lignocellulose; maleic anhydrides; mechanical properties; polypropylenes; scanning electron microscopy; temperature; thermal degradation; thermal stability; thermoplastics; wood flour
- Abstract:
- ... Hybrid composites of thermoplastic biofiber reinforced with waste newspaper fiber (NF) and poplar wood flour (WF) were prepared. The weight ratio of the lignocellulosic materials to polymer was 30:70 (w:w). Polypropylene (PP) and maleic anhydride grafted polypropylene (MAPP) were also used as the polymer matrix and coupling agent, respectively. The mechanical properties, morphology and thermal pro ...
- DOI:
- 10.1007/s10924-009-0155-6
- https://doi.org/10.1007/s10924-009-0155-6
- Author:
- Martins-Franchetti, Sandra M.; Egerton, T. A.; White, J. R.
- Source:
- Journal of polymers and the environment 2010 v.18 no.1 pp. 79-83
- ISSN:
- 1566-2543
- Subject:
- Curvularia; Phanerochaete chrysosporium; biodegradation; crystals; poly(vinyl chloride)
- Abstract:
- ... The biodegradation of blends of poly(caprolactone) (PCL) and poly(vinyl chloride) (PVC) has been studied. Blends of composition PCL/PVC 1:1 and 1:2 w/w were tested. The 1:1 blend contained crystals in the as-cast state and became more crystalline on exposure to different bio-active agents. The 1:2 blend was amorphous in the as-cast state but developed a significant crystal component after 4 months ...
- DOI:
- 10.1007/s10924-009-0158-3
- https://doi.org/10.1007/s10924-009-0158-3
- Author:
- Sinha, Vijaykumar; Patel, Mayank R.; Patel, Jigar V.
- Source:
- Journal of polymers and the environment 2010 v.18 no.1 pp. 8-25
- ISSN:
- 1566-2543
- Subject:
- aminolysis; glycolysis; hydrolysis; methanolysis; pollution; polymers; recycling; socioeconomics; waste disposal
- Abstract:
- ... The paper reviews the problem due to the use and disposal of synthetic polymers to the environment and its solutions; in particular poly (ethylene terphthalate). Wide spread application and non-biodegradability of the PET creates huge amounts of waste and disposal, tend to a serious problem. The most important cause for recycling and reprocessing the waste PET has arisen from the awareness and con ...
- DOI:
- 10.1007/s10924-008-0106-7
- https://doi.org/10.1007/s10924-008-0106-7
- Author:
- Fabiyi, James S.; McDonald, Armando G.
- Source:
- Journal of polymers and the environment 2010 v.18 no.1 pp. 57-64
- ISSN:
- 1566-2543
- Subject:
- Fourier transform infrared spectroscopy; color; colorimetry; lignin; oxidation; poly(vinyl chloride); scanning electron microscopy; weathering; wood; wood plastic composites
- Abstract:
- ... This study investigated weathering effects on polyvinyl chloride (PVC) based wood plastic composites (WPC), with a focus on the color and structure that is attributed to the material composition. It is directed towards quantifying the main chemical modifications, such as carbonyl and vinyl groups which are formed during weathering. These composites were subjected to three weathering regimes: exter ...
- DOI:
- 10.1007/s10924-009-0152-9
- https://doi.org/10.1007/s10924-009-0152-9