Preparation, morphology and superior performances of biobased thermoplastic elastomer by in situ dynamical vulcanization for 3D-printed materials

Hu, Xiaoran; Kang, Hailan; Li, Yan; Geng, Yiting; Wang, Runguo; Zhang, Liqun

doi:10.1016/j.polymer.2016.11.045

Cited by 68 publications

(32 citation statements)

References 34 publications

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“…In particular, the temperature for adding DCP was maintained at 165 C as possible, avoiding the quick decomposition of DCP at a higher temperature because the half-life of DCP at 170 C was about 1 min. 16,17 Finally, the room temperature-cooled blend samples were ground and put into the cavity of hot mold at 190 C. After 2 min of preheating between the plates of the mold at zero pressure, the sample was compression-molded and then cooled. The sheets with 1-mm thickness were removed and cooled at room temperature.…”

Section: Preparation Of Tpes and Compoundsmentioning

confidence: 99%

The effect of lanthanum trimethacrylate on the mechanical properties and flame retardancy of dynamically vulcanized PP/EPDM thermoplastic vulcanizates

Zhou

Lü

Lai

et al. 2017

Journal of Elastomers & Plastics

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A new kind of polypropylene/ethylene-propylene-diene monomer (PP/EPDM) thermoplastic elastomer (TPE) with good mechanical properties and flame retardancy was prepared via in situ peroxide-induced dynamic vulcanization using lanthanum trimethacrylate (LaTMA) as a reinforcing agent. The morphology, structure, and mechanical properties and reinforcement mechanism of PP/EPDM/LaTMA TPE were investigated by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, rubber process analyzer, cross-link density test, and so on. The flame retardancy was investigated by limiting oxygen index (LOI) test. The results showed that when the amount of lanthanum oxide was 4.96 phr and methyl methacrylate was 7.85 phr, the compatibility between EPDM and PP was greatly improved. Besides, the tensile strength, tear strength, elongation at break, and hardness (shore A) of PP/EPDM/LaTMA TPE were increased from 6.2 MPa, 41.7 kN m À1 , 148%, and 81 up to 11.1 MPa, 77.3 kN m À1 , 365%, and 89, respectively. And the LOI of PP/EPDM/LaTMA TPE was increased to 19.0%. The SEM images, the higher G 0 , and the ionic cross-link suggested that a strong filler-filler network was formed by the polymerization and the grafted of LaTMA in the PP and EPDM phase which enhanced the compatibility between PP and EPDM. The DSC and FTIR results further proved that during the processing.

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Section: Preparation Of Tpes and Compoundsmentioning

confidence: 99%

The effect of lanthanum trimethacrylate on the mechanical properties and flame retardancy of dynamically vulcanized PP/EPDM thermoplastic vulcanizates

Zhou

Lü

Lai

et al. 2017

Journal of Elastomers & Plastics

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“…There are many publications describing dynamically vulcanized biopolymer blends. Most of them use PLA as matrix phase with different commercially available soft segments like natural rubber (NR) [17,18], epoxidized natural rubber (ENR) [19,20], poly(ethylene-co-vinyl acetate) (EVA) [21,22] and different synthesized bio-based unsaturated elastomers [23,24]. Nevertheless, there are also publications with other matrices, for example polyhydroxyalkanoates (PHAs) [25,26].…”

Section: Introductionmentioning

confidence: 99%

Compatibilization of Poly(Lactic Acid) (PLA) and Bio-Based Ethylene-Propylene-Diene-Rubber (EPDM) via Reactive Extrusion with Different Coagents

2020

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Much effort has been made to enhance the toughness of poly (lactic acid) (PLA) to broaden its possible range of usage in technical applications. In this work, the compatibility of PLA with a partly bio-based ethylene-propylene-diene-rubber (EPDM) through reactive extrusion was investigated. The concentration of EPDM in the PLA matrix was in the range of up to 20%. The reactive extrusion was carried out in a conventional twin-screw extruder. Contact angle measurements were performed to calculate the interfacial tension and thus the compatibility between the phases. The thermal and mechanical properties as well as the phase morphology of the blends were characterized. A copolymer of poly (ethylene-co-methyl acrylate-co-glycidyl methacrylate) (EMAGMA) was used as compatibilizer, which leads to a significant reduction in the particle size of the dispersed rubber phase when compared with the blends without this copolymer. The use of EMAGMA combined with soybean oil (SBO) and a radical initiator enhances the elongation at break of the compound. The results indicate that the reduction of the particle size of the dispersed phase obtained with the compatibilizer alone is not sufficient to improve the mechanical properties of the blend system. The induced radical reactions also influenced the mechanical properties of the blend significantly.

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“…15 Polylactide (PLA) is one of the most promising biopolymers because of its biodegradability, superior physical–mechanical properties, and relatively low cost. 16 –25 It is formed by the polycondensation reaction of lactic acid monomer and is a bio-based and biodegradable polymeric material. PLA can be broken down by hydrolytic to its monomeric form, lactic acid.…”

Section: Introductionmentioning

confidence: 99%

Morphology evolution, mechanical properties, Mullins effect, and its reversibility of polylactide/nitrile butadiene rubber thermoplastic vulcanizates plasticized by dioctyl phthalate

Zhang

Jiang

Wang

2019

Journal of Thermoplastic Composite Materials

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Thermoplastic vulcanizates (TPVs) based on polylactide (PLA)/nitrile butadiene rubber (NBR) blends were prepared by dynamic vulcanization where the PLA phase was plasticized by dioctyl phthalate (DOP), and the influence of DOP dosage on mechanical properties, morphology evolution, Mullins effect, and its reversibility were investigated systematically. The experimental results indicated that the mechanical properties of PLA/NBR TPVs were improved significantly with the addition of DOP. Compared with that of the PLA/NBR TPVs, the Shore A hardness was decreased obviously, while the elongation at break was increased slightly with increasing DOP dosage. Mullins effect results showed that the TPVs incorporated with DOP had the relatively lower stress-softening effect. The recovery ability of the maximum stress could be remarkably enhanced by increasing heat treatment temperature. Morphology studies showed that the network microstructure of the co-continuous phases was denser with the increasing dynamic vulcanization time; however, the network microstructure of the co-continuous was changed slightly with the addition of DOP.

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Preparation, morphology and superior performances of biobased thermoplastic elastomer by in situ dynamical vulcanization for 3D-printed materials

Cited by 68 publications

References 34 publications

The effect of lanthanum trimethacrylate on the mechanical properties and flame retardancy of dynamically vulcanized PP/EPDM thermoplastic vulcanizates

The effect of lanthanum trimethacrylate on the mechanical properties and flame retardancy of dynamically vulcanized PP/EPDM thermoplastic vulcanizates

Compatibilization of Poly(Lactic Acid) (PLA) and Bio-Based Ethylene-Propylene-Diene-Rubber (EPDM) via Reactive Extrusion with Different Coagents

Morphology evolution, mechanical properties, Mullins effect, and its reversibility of polylactide/nitrile butadiene rubber thermoplastic vulcanizates plasticized by dioctyl phthalate

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