Enhancing the Melt Strength of Poly(Lactic Acid) via Micro-Crosslinking and Blending with Poly(Butylene Adipate-co-Butylene Terephthalate)for the Preparation of Foams

Zhang, Rong; Cai, Chang; Liu, Qingting; Hu, Songqing

doi:10.1007/s10924-016-0911-3

Cited by 38 publications

(21 citation statements)

References 27 publications

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“…The PLA cold crystallization temperature ( T cc ) shifted to low temperature about 10°C when added the PBAT, from 108.5°C to 98.4°C, the results were similar with Zhang . T cc is shifted to the lower temperature due to increase in molecular weight of PLA and PBAT when the BIBP existed.…”

Section: Resultssupporting

confidence: 73%

The Mechanical, Thermal, Rheological and Morphological Properties of PLA/PBAT Blown Films by Using Bis(tert‐butyl dioxy isopropyl) Benzene as Crosslinking Agent

et al. 2018

Polymer Engineering & Sci

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Blown films of poly(lactic acid) (PLA)/poly(butylene adipate‐co‐terephthalate) (PBAT) blends were prepared, bis(tert‐butyl dioxy isopropyl) benzene (BIBP) as crosslinking agent. From wide‐angle X‐ray diffraction results, PLA/PBAT/BIBP involved all the diffraction peaks were consistent with PLA and PBAT. For the DSC curves of PLA/PBAT/BIBP films, there were two glass transition temperature and two melt temperature, there existed two step decomposition in the thermogravimetric curves. Both Han plots and Cole–Cole plots indicated high homogeneity of the 40/60/0.1 PLA/PBAT/BIBP blend. SEM micrographs of the films revealed more ductile deformation with increasing PBAT content and 40/60/0.1 sample had better miscible compared with others. For the PLA/PBAT/BIBP films, tensile tests indicated that the elongation at break were increased with increasing PBAT content and the values of the tensile strength in the machine direction were higher than those in the transverse direction. The addition of PBAT, enhanced the toughness of the PLA/PBAT/BIBP films. From tear test and heat sealing test, the 40/60/0.1 PLA/PBAT/BIBP film exhibited the highest tear strength and the highest sealing strength among all the samples. POLYM. ENG. SCI., 59:E227–E236, 2019. © 2018 Society of Plastics Engineers

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Section: Resultssupporting

confidence: 73%

The Mechanical, Thermal, Rheological and Morphological Properties of PLA/PBAT Blown Films by Using Bis(tert‐butyl dioxy isopropyl) Benzene as Crosslinking Agent

et al. 2018

Polymer Engineering & Sci

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“…For PLA, rather lower expansion can be expected with chemical blowing agents because of the limited gas yield. Consequently, only a few reports were done, mainly with azodicarbonamide (ADC) [ 43 , 59 , 60 , 84 , 99 , 110 ]. Also, nitrogen is rarely applied as a blowing agent for PLA and rather less expansion was achieved [ 61 ].…”

Section: Processesmentioning

confidence: 99%

Chemical Modification and Foam Processing of Polylactide (PLA)

et al. 2019

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Polylactide (PLA) is known as one of the most promising biopolymers as it is derived from renewable feedstock and can be biodegraded. During the last two decades, it moved more and more into the focus of scientific research and industrial use. It is even considered as a suitable replacement for standard petroleum-based polymers, such as polystyrene (PS), which can be found in a wide range of applications—amongst others in foams for packaging and insulation applications—but cause strong environmental issues. PLA has comparable mechanical properties to PS. However, the lack of melt strength is often referred to as a drawback for most foaming processes. One way to overcome this issue is the incorporation of chemical modifiers which can induce chain extension, branching, or cross-linking. As such, a wide variety of substances were studied in the literature. This work should give an overview of the most commonly used chemical modifiers and their effects on rheological, thermal, and foaming behavior. Therefore, this review article summarizes the research conducted on neat and chemically modified PLA foamed with the conventional foaming methods (i.e., batch foaming, foam extrusion, foam injection molding, and bead foaming).

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“…Another inherent weakness such as inherent brittleness, narrow processing window, low thermal stability, and high price in comparison with polyolefins limits their large scale applications . To overcome these drawbacks, the processability of film blowing and the mechanical properties of the PLA can be improved through copolymerization or blending with other polymers . Melt‐blending PLA in an extruder with other flexible polymers is an excellent method to modify PLA.…”

Section: Introductionmentioning

confidence: 99%

The morphological, mechanical, rheological, and thermal properties of PLA/PBAT blown films with chain extender

Pan

et al. 2018

Polymers for Advanced Techs

106

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Biodegradable poly(lactic acid) (PLA)/poly(butylene adipate‐co‐terephthalate) (PBAT) blends and films were prepared using melt blending and blowing films technique in the presence of chain extender‐Joncryl ADR 4370F. The ADR contains epoxy functional groups and used as a compatibilizer. The morphological, mechanical, rheological, thermal, and crystalline properties of the PLA/PBAT/ADR blown films were studied. Scanning electron microscopy micrographs of the films revealed more ductile deformation with increasing PBAT content. The addition of PBAT enhanced the toughness of the PLA film. Tensile tests indicated that the elongation at break increased from 20.5% to 334.6% in the machine direction and from 7.1% to 715.9% in the transverse direction. The Young modulus increased from 2690.5 to 395.6 MPa in the machine direction and from 2623.5 to 154.0 MPa in the transverse direction. The sealing strength of 40/60/0.15 PLA/PBAT/ADR film was the highest among all the samples up to 9.4 N 15 mm−1. These findings gave important implications for designing and manufacturing polymer packaging materials.

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Enhancing the Melt Strength of Poly(Lactic Acid) via Micro-Crosslinking and Blending with Poly(Butylene Adipate-co-Butylene Terephthalate)for the Preparation of Foams

Cited by 38 publications

References 27 publications

The Mechanical, Thermal, Rheological and Morphological Properties of PLA/PBAT Blown Films by Using Bis(tert‐butyl dioxy isopropyl) Benzene as Crosslinking Agent

The Mechanical, Thermal, Rheological and Morphological Properties of PLA/PBAT Blown Films by Using Bis(tert‐butyl dioxy isopropyl) Benzene as Crosslinking Agent

Chemical Modification and Foam Processing of Polylactide (PLA)

The morphological, mechanical, rheological, and thermal properties of PLA/PBAT blown films with chain extender

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