U.S. flag

An official website of the United States government

PubAg

Main content area

You searched for: Journal Journal of polymers and the environment Remove constraint Journal: Journal of polymers and the environment Publication Year 2010 Remove constraint Publication Year: 2010 Source 2010 v.18 no.1 Remove constraint Source: 2010 v.18 no.1
Start Over

Search

9  Search Results

1 - 9 of 9
Number of results to display per page

Search Results

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

2. Characterization of Atrazine-Loaded Biodegradable Poly(Hydroxybutyrate-Co-Hydroxyvalerate) Microspheres

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

3. Effect of Reprocessing and Accelerated Weathering on ABS Properties

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

4. Effect of Solvent Composition on Porosity, Surface Morphology and Thermal Behavior of Metal Alginate Prepared from Algae (Undaria pinnatifida)

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

5. Ethoxylated Soybean Polyols for Polyurethanes

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

6. Hybrid Composites from Waste Materials

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

7. Morphological Changes in Poly(Caprolactone)/Poly(Vinyl Chloride) Blends Caused by Biodegradation

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

8. Pet Waste Management by Chemical Recycling: A Review

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

9. Physical Morphology and Quantitative Characterization of Chemical Changes of Weathered PVC/Pine Composites

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