Structure-properties of super-tough PLA alloy with excellent heat resistance

Hashima, Kazuhiro; Nishitsuji, Shotaro; Inoue, Takashi

doi:10.1016/j.polymer.2010.06.045

Cited by 240 publications

(195 citation statements)

References 21 publications

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“…Poly(lactic acid) (PLA) is another promising biodegradable polymer derived from renewable resources (e.g., corn, wheat, or rice). It exhibits a potential as an effective reinforcing agent for PPC due to its high strength and stiffness [11,12]. On the other hand, its inherent brittleness can be simultaneously improved by the flexible PPC as a toughening agent [13].…”

Section: Introductionmentioning

confidence: 99%

Effect of homopolymer poly(vinyl acetate) on compatibility and mechanical properties of poly(propylene carbonate)/poly(lactic acid) blends

Gao¹,

Bai²,

Zhang³

et al. 2012

Express Polym. Lett.

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Abstract.A small amount of homopolymer poly(vinyl acetate) (PVAc) is used to compatibilize the biodegradable blends of poly(propylene carbonate) (PPC) and poly(lactic acid) (PLA). Scanning electron microscopy (SEM) and differential scanning calorimetry (DSC) results show that PVAc is selectively localized in the PLA phase and at the interface between PPC and PLA phases. As a result, these interface-localized PVAc layers act as not only a compatibilizer to improve the phase dispersion significantly but also a bridge to increase the interfacial adhesion between PPC and PLA phases dramatically. Both of them are believed to be responsible for the enhancement in mechanical properties. This work provides a simple avenue to fabricate eco-friendly PPC/PLA blends with high performance, and in some cases, reducing the demand for petroleumbased plastics such as polypropylene.

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Section: Introductionmentioning

confidence: 99%

Effect of homopolymer poly(vinyl acetate) on compatibility and mechanical properties of poly(propylene carbonate)/poly(lactic acid) blends

Gao¹,

Bai²,

Zhang³

et al. 2012

Express Polym. Lett.

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“…In the literature there are many studies on the subject of degradation of polyhydroxyacids such as polylactide, poly(lactide-co-glycolide), or poly(d,l-lactide-coglycolide) [18]. Most of them focus on the analysis of chemical, structural, or thermal properties and only selected mechanical parameters of the examined polymers.…”

Section: Discussionmentioning

confidence: 99%

“…The strain rate was 0.16/min. [18]. The obtained characteristics σ = f (ε) were used to determine Young's in the linear region of the stress-strain curve, tensile strength σ and deformability ε (Figs.…”

Section: Static Propertiesmentioning

confidence: 99%

Mechanical, rheological, fatigue, and degradation behavior of PLLA, PGLA and PDGLA as materials for vascular implants

et al. 2012

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The biggest challenge in the treatment of arterial stenosis remains the issue of optimization of stent design. Despite continuous improvement in surgical techniques and use of intensive pharmacotherapy, the results of stent coronary interventions may be unsatisfactory, and long-term interaction of a metal implant with a blood vessel results in complications such as recurrent stenosis and thrombosis. Therefore, it is necessary to search for new materials and stent designs to obtain a stent capable of restoring flow in the vessel and disappearing after fulfilling its function. Such stent must also be compatible with the vessel wall to enable regeneration of new structure of endothelium and deeper artery layers damaged during implantation. Consequently, there is ongoing search for functional solutions with minimum effects of long-term implant-tissue interaction. In light of the above, the team investigated the possibility of using biodegradable polymers already mentioned in the literature as a construction material for vascular stent. The study used three polyhydroxyacids based on lactic acid and glycolic acid: poly(l-lactide), poly(lactideco-glycolide) and poly(d,l-lactide-co-glycolide). The research focused on assessing changes in mechanical, thermomechanical, rheological, and fatigue properties during the process of hydrolytic degradation. The analysis also covered the rate of release of degradation products. The results of the conducted tests indicate the possibility of developing a vascular stent with biodegradable polymers.

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“…2a1-4, BE was observed as the dark phase in TEM micrographs, because flexible BE macromolecules have more double bonds than PLA matrix and these double bonds readily react with RuO 4 [40,41]. While phase separation is evident at all fractions, BE particles are uniformly dispersed in PLA matrix.…”

Section: Morphologymentioning

confidence: 99%

Employing a novel bioelastomer to toughen polylactide

Kang

Qiao

Wang

et al. 2013

Polymer

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ABSTRACT. Biodegradable, biocompatible polylactide (PLA) synthesized from renewable resources has attracted extensive interests over the past decades and holds great potential to replace many petroleum-derived plastics. With no loss of biodegradability and biocompatibility, we highly toughened PLA using a novel bioelastomer (BE)-synthesized from biomass diols and diacids. Although PLA and BE are immiscible, BE particles of ~1 µm in diameter are uniformly dispersed in the matrix, and this indicates some compatibility between PLA and BE. BE significantly increased the cold crystallization ability of PLA, which was valuable for practical processing and performance. SEM micrographs of fracture surface showed a brittle-to-ductile transition owing to addition of BE. At 11.5 vol%, notched Izod impact strength improved from 2.4 to 10.3 kJ/m 2 , 330% increment; the increase is superior to previous toughening effect by using petroleum-based tougheners.

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Structure-properties of super-tough PLA alloy with excellent heat resistance

Cited by 240 publications

References 21 publications

Effect of homopolymer poly(vinyl acetate) on compatibility and mechanical properties of poly(propylene carbonate)/poly(lactic acid) blends

Effect of homopolymer poly(vinyl acetate) on compatibility and mechanical properties of poly(propylene carbonate)/poly(lactic acid) blends

Mechanical, rheological, fatigue, and degradation behavior of PLLA, PGLA and PDGLA as materials for vascular implants

Employing a novel bioelastomer to toughen polylactide

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