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Preparation of LDPE-Acetylated/Butyrylated Starch Blend Blow Films and Characterization

Chinese Journal of Polymer Science 2014年第3期32卷 268-279页

作者： Sangeeta Garg Asim Kumar Jana Department of Chemical Engineering National Institute of TechnologyJalandhar Department of Biotechnology National Institute of TechnologyJalandhar

Development of modified plastics has been studied through the LDPE-acylated starch blend films to examine the effect of different acyl groups and degrees of substitution （DS） on properties of films. Corn starch was modified with acetyl and hutyryl groups and films were prepared by blending acylated starch with low density polyethylene （LDPE）. Systematic studies were done to observe the effect of acyl groups, DS and starch concentration on the properties and biodegradability.of the blend films. It was observed that blend films containing 5% acetylated and butyrylated starches of high DS （2.5, 1.7） maintained 75% and 83% of tensile strength of LDPE films. Thermal analysis results indicated that acetylated and butyrylated starch blend films decomposed at 370℃ and 389℃ which were higher than the decomposition temperature of native starch film （349℃）. Scanning electron micrographs of blend films containing high DS acylated starch showed well dispersed starch particles due to improvement in dispersion between starch and LDPE. Water absorption capacity of high DS acetylated and butyrylated starch blend films （4.18% and 3.76%, respectively） was lower than that of native starch films （5%）. This study has an advantage because of blown films prepared can be integrated with the present manufacturing systems without any other requirement.

关键词： Acylated starch LDPE-starch blend films Mechanical properties Water absorption capacity biodegradability.

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STUDY ON biodegradability.OF POLY (3-HYDROXYBUTYRATE-co-3-HYDROXYVALERATE)/ORGANOPHILIC MONTMORILLONITE NANOCOMPOSITES

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Chinese Journal of Reactive Polymers 2004年第1期13卷 65-73页

作者： WANGShufang SONGCunjiang CHENGuangxin LIUJing YANGChao ZHANGXihui GUOTianying ZHANGBanghua State Key Laboratory of Functional Polymer Materials for Adsorption and Separation hTstitute of Polymer ChemtryN＆Tjoint AcademyNankai UniversityTianjin 300071China Department of Microbiology Life Science CollegeNankai UniversityTianjin 300071China

Poly (3-hydroxybutyrate-co-3-hydroxyvalerate)/Organophilic montmorillonite (PHBV/OMMT) nanocomposites were prepared and the biodegradability.of the PHBV/OMMT nanocomposites was studied by a cultivation degrading method in soil suspension. The relationship between structure and biodegradability.of PHBV/OMMT nanocomposites was investigated. The results showed that the biodegradability.of PHBV/OMMT nanocomposites decreased with increasing amount of OMMT and it was related to the number of PHBV degrading microorganisms in degradation environment, the anti-microbial property of OMMT and the degree of crystallinity of the nanocomposites.

关键词： Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Organophilic montmorillonite biodegradability.

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STUDY ON biodegradability.OF POLY (3-HYDROXYBUTYRATE-co-3-HYDROXYVALERATE)/ORGANOPHILIC MONTMORILLONITE NANOCOMPOSITES

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Chinese Journal of Reactive Polymers 2004年第Z1期 65-73页

作者： WANG Shufang1 SONG Cunjiang2,** CHEN Guangxin1 LIU Jing2 YANG Chao2 ZHANG Xihui2 GUO Tianying1 ZHANG Banghua1 1 State Key Laboratory of Functional Polymer Materials for Adsorption and Separation, Institute of Polymer Chemistry, N & T Joint Academy, Nankai University, Tianjin 300071, China 2 Department of Microbiology, Life Science College, Nankai University, Tianjin 300071, China

关键词： Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Organophilic montmorillonite biodegradability.

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PREPARATION AND PROPERTIES OF POLY(LACTIC ACID-CO-GLYCOL TEREPHTHALIC ACID)COPOLYESTER

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Chinese Journal of Reactive Polymers 2006年第1期15卷 63-69页

作者： GAO Cuili JI Quan KONG Qingshan XIA Yanzhi Advanced fibers and Modern Textile Cultivation Base for State Key Laboratory College of Chemical Engineering Qingdao University Qingdao 266071 China

To obtain a kind of biodegradable polymer material with satisfactory properties, a new biodegradable copolyester poly（lactic acid-co-glycol terephthalate）（PETA）, was synthesized from three monomers of lactic acid, glycol and terephthalic acid. The resulting copolyesters, PETA, were characterized by FT-IR, ^1H-NMR, DSC, TGA and by the ways of weight loss rate to characterize their biodegradability. The findings in this work indicated that, the Tins and Tas of copolyesters PETA increased with increasing contents of the terephthalic acid units. From the biodegradation tests in natural soil, boiling water, acid buffer solution and alkali buffer solution, it was shown that the biodegradability.of copolyesters PETA decreased with increasing contents of the terephthalic acid units.

关键词： Lactic acid Glycol Terephthalic acid Copolyester Thermal properties biodegradability.

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