Crystallization Behavior and Morphology of Biodegradable Polylactide/Layered Silicate Nanocomposite

Nam, Joo Young; Ray, Suprakas Sinha; Okamoto, Masami

doi:10.1021/ma034623j

Cited by 407 publications

(287 citation statements)

References 24 publications

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“…Among all these polymers, poly(lactic acid) (PLA) is one of the most promising because it is thermoplastic, biocompatible and has a high strength, a high modulus, and good processability [143]. PLA also has been revealed an inefficient crystallization process for both the lower crystallization rate and crystallinity as compared with other polymers [144][145][146][147].…”

Section: Polymeric Bio-related Nanocompositesmentioning

confidence: 99%

Vermiculite: Structural Properties and Examples of the Use

Valášková¹,

Martynková²

2012

Clay Minerals in Nature - Their Characterization, Modification and Application

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Section: Polymeric Bio-related Nanocompositesmentioning

confidence: 99%

Vermiculite: Structural Properties and Examples of the Use

Valášková¹,

Martynková²

2012

Clay Minerals in Nature - Their Characterization, Modification and Application

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“…To determine the crystallinity of the sample, the heats of cold crystallization and pre-melt crystallization were subtracted from heat of melting [22].…”

Section: Differential Scanning Calorimetry (Dsc) Analysismentioning

confidence: 99%

Influence of accelerated ageing on the physico-mechanical properties of alkali-treated industrial hemp fibre reinforced poly(lactic acid) (PLA) composites

Islam

Pickering

Foreman³

2010

Polymer Degradation and Stability

138

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Abstract. In this study, 30 wt% aligned untreated long hemp fibre/PLA (AUL) and aligned alkali treated long hemp fibre/PLA (AAL) composites were produced by film stacking and subjected to accelerated ageing environment. Accelerated ageing was carried out with an accelerated ageing chamber using UV-irradiation and water spray at 50 °C for four different time intervals (250, 500, 750 and 1000 hrs). After accelerated ageing, tensile strength (TS), flexural strength, Young's modulus (YM), flexural modulus and mode I fracture toughness (K Ic ) were found to decrease and impact strength (IS) was found to increase for both AUL and AAL composites. AUL composites had greatest overall reduction in mechanical properties than that for AAL composites upon exposure to accelerated ageing environment. FTIR analysis and crystallinity contents of the accelerated aged composites support the results of the deterioration of mechanical properties upon exposure to accelerated ageing environment.

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“…Incorporation of nucleating agent provides an efficient way to accelerate the crystallization rate, enhance the X c , and improve the heat resistance of PLLA within a short thermal processing time. Many nucleating agents including carbon fillers, cellulose nanocrystals, talc, crystallites of high-melting-point PLLA (hPLLA), and stereocomplex (SC) crystallites of PLLA and poly(D-lactide) (PDLA) have been employed to enhance the crystallization rate of PLLA [36][37][38][39][40][41][42]. Investigations by Yang et al [35,37] indicated that hPLLA showed the most effective nucleation effect for PLLA when compared to talc and SC crystallites.…”

Section: Introductionmentioning

confidence: 99%

Fully bio-based, highly toughened and heat-resistant poly(L-lactide) ternary blends via dynamic vulcanization with poly(D-lactide) and unsaturated bioelastomer

Zeng

et al. 2017

Sci. China Mater.

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Inherent brittleness and low heat resistance are the two major obstacles that hinder the wide applications of poly(L-lactide) (PLLA). In this study, we report a fully biobased, highly toughened and heat-resistant PLLA ternary blend, which was prepared by dynamic vulcanization of PLLA with poly(D-lactide) (PDLA) and an unsaturated bioelastomer (UBE). The results indicated that during dynamic vulcanization PDLA cocrystallized with PLLA to form stereocomplex (SC) crystallites, which not only enhanced the molecular entanglement but also accelerated the crystallization rate of PLLA matrix. With increase in the content of PDLA, the matrix molecular entanglement increased while phase-separation was enhanced, which enabled the impact strength to increase first and then decrease. The ternary blends containing 10 wt.% PDLA showed the highest impact strength. The presence of SC crystallites makes it possible to achieve a fully sustainable PLLA/VUB/PDLA ternary blend with highly crystalline matrix under conventional injection molding, due to the high nucleation efficiency of SC towards crystallization of PLLA. The highly crystalline ternary blend showed excellent heat resistance and better impact toughness than high impact polystyrene.

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Crystallization Behavior and Morphology of Biodegradable Polylactide/Layered Silicate Nanocomposite

Cited by 407 publications

References 24 publications

Vermiculite: Structural Properties and Examples of the Use

Vermiculite: Structural Properties and Examples of the Use

Influence of accelerated ageing on the physico-mechanical properties of alkali-treated industrial hemp fibre reinforced poly(lactic acid) (PLA) composites

Fully bio-based, highly toughened and heat-resistant poly(L-lactide) ternary blends via dynamic vulcanization with poly(D-lactide) and unsaturated bioelastomer

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