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      Kinetic Analysis on Thermal Decomposition of Poly(lactic acid) Toughened by Calcium Sulfate Whiskers

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          Abstract

          The biocomposites of poly (lactic acid) (PLA) involving 15 % mass fraction of calcium sulfate whiskers (CSW) were prepared via melt-blending technology, in an effort of toughening PLA and enhancing the thermal stability. The morphological structure, impact toughness, thermal stability as well as kinetic analysis on thermal decomposition for PLA/CSW composites were performed thoroughly. The results showed that CSW was organized successfully via silanization, helping to form well-bonded interfaces, and accordingly, the impact toughness increased remarkably. The thermal stability was enhanced by adding whiskers, leading to increased decomposition temperature and decreased mass conversion rate. Kinetic analysis revealed the great dispersions on the reaction order and activation energy. Though, in comparison to pure PLA, the reaction order of PLA/CSW composites increased based on calculation methods except for Carrasco's, the activation energy of the composites declined independently of the applied mathematical models, meaning that thermal decomposition of PLA phase was accelerated by the introduced CSW.

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          Most cited references 52

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          Reaction Kinetics in Differential Thermal Analysis

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            Graphene/Polymer Nanocomposites

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              An overview of the recent developments in polylactide (PLA) research.

              The concept of biodegradable plastics is of considerable interest with respect to solid waste accumulation. Greater efforts have been made in developing degradable biological materials without any environmental pollution to replace oil-based traditional plastics. Among numerous kinds of degradable polymers, polylactic acid sometimes called polylactide, an aliphatic polyester and biocompatible thermoplastic, is currently a most promising and popular material with the brightest development prospect and was considered as the 'green' eco friendly material. Biodegradable plastics like polyglycolic acid, polylactic acid, polycaprolactone, polyhydroxybutyrate, etc. are commercially available for controlled drug releases, implantable composites, bone fixation parts, packaging and paper coatings, sustained release systems for pesticides and fertilizers and compost bags etc. This review will provide information on current PLA market, brief account on recent developments in the synthesis of lactic acid (monomer of PLA) through biological route, PLA synthesis, unique material properties of PLA and modification of those by making copolymers and composites, PLA degradation and its wide spectrum applications.
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                Author and article information

                Journal
                ipp
                International Polymer Processing
                Carl Hanser Verlag
                0930-777X
                2195-8602
                7 March 2019
                : 34
                : 1
                : 9-19
                Affiliations
                1 School of Materials and Engineering, Anhui University of Science and Technology, Huainan, PRC
                2 School of Energy Resources and Safety, Anhui University of Science and Technology, Huainan, PRC
                3 College of Engineering, Nanjing Agriculture University, Nanjing, PRC
                Author notes
                [* ] Correspondence address, Mail address: Ji-nian Yang, School of Materials and Engineering, Anhui University of Science and Technology, Huainan 232001, PRC, E-mail: yangjinian@ 123456163.com
                IPP3611
                10.3139/217.3611
                © 2019, Carl Hanser Verlag, Munich
                Counts
                References: 53, Pages: 9
                Product
                Self URI (journal page): http://www.hanser-elibrary.com/loi/ipp
                Categories
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