Water vapor permeability of poly(lactide)s: Effects of molecular characteristics and crystallinity

Tsuji, Hideto; Okino, Rumiko; Daimon, Hiroyuki; Fujie, Koichi

doi:10.1002/app.22698

Cited by 117 publications

(93 citation statements)

References 29 publications

(28 reference statements)

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“…He reported activation energies of 5 and − 0.1 kJ/mol for amorphous and crystalline PLA, respectively [45]. In a more detailed study by Tsuji and others [46], the effects of D-lactide content, degree of crystallinity, and Mw of PLA films on WVTR were studied. They observed the WVTR of PLA films decreased monotonically with increasing crystallinity from 0% to 20%, while leveled off for crystallinity exceeding 30%; so they suggested this change due to the higher resistance of restricted amorphous regions to water vapor permeation compared with that of the free amorphous regions.…”

Section: Properties Of Lactic Acid-based Polymersmentioning

confidence: 99%

Physical and mechanical properties of PLA, and their functions in widespread applications — A comprehensive review

Farah

Anderson

Langer

2016

Advanced Drug Delivery Reviews

2,262

1,486

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Available online xxxxPoly(lactic acid) (PLA), so far, is the most extensively researched and utilized biodegradable aliphatic polyester in human history. Due to its merits, PLA is a leading biomaterial for numerous applications in medicine as well as in industry replacing conventional petrochemical-based polymers. The main purpose of this review is to elaborate the mechanical and physical properties that affect its stability, processability, degradation, PLA-other polymers immiscibility, aging and recyclability, and therefore its potential suitability to fulfill specific application requirements. This review also summarizes variations in these properties during PLA processing (i.e. thermal degradation and recyclability), biodegradation, packaging and sterilization, and aging (i.e. weathering and hygrothermal). In addition, we discuss up-to-date strategies for PLA properties improvements including components and plasticizer blending, nucleation agent addition, and PLA modifications and nanoformulations. Incorporating better understanding of the role of these properties with available improvement strategies is the key for successful utilization of PLA and its copolymers/composites/blends to maximize their fit with worldwide application needs.© 2016 Elsevier B.V. All rights reserved. Contents lists available at ScienceDirectAdvanced Drug Delivery Reviews

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Section: Properties Of Lactic Acid-based Polymersmentioning

confidence: 99%

Physical and mechanical properties of PLA, and their functions in widespread applications — A comprehensive review

Farah

Anderson

Langer

2016

Advanced Drug Delivery Reviews

2,262

1,486

View full text Add to dashboard Cite

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“…For PLA, it is known that the barrier properties are lower than those of PHBV. 1,9,10 Tsuji and Tsuruno 11 stated WVTR of PLA films with a thickness of 25 µm of 98 -224 g m -2 d -1 depending on their ratio of stereocomplexes.…”

Section: Blending Of Polyhydroxybutyrate-co-valerate With Polylactic mentioning

confidence: 99%

Blending of Polyhydroxybutyrate-co-valerate with Polylactic Acid for Packaging Applications – Reflections on Miscibility and Effects on the Mechanical and Barrier Properties

Jost¹

2015

Chem.Biochem.Eng.Q.

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Biopolymers for packaging applications offer many advantages and are therefore of increasing interest. In order to develop a sustainable alternative for petrochemical-based polymers the biobased and biodegradable polymers, the focus of this work are polyhydroxybutyrate-co-valerate (PHBV) and polylactic acid (PLA) (and copolymers). Blending of these two biopolymers was reviewed under thermodynamic aspects and backed with own results. Additionally, different ways of improving the miscibility were performed by compatibilisers, peroxides, transesterification catalysts, and by blending PHBV with modified molecular weight. These blends were extruded as cast films, and characterised by means of mechanical and barrier properties. This study analyses the miscibility of PLA and PHB-copolyester (with approximately equal molar masses) and reports on the unusually high barrier properties in PLA and PHBV blends. However, the quality of blending, especially regarding barrier properties to interphase boundaries, depends on the compatibility of the components and the morphology of the blend. Our results suggest that a PHBV content of 20-35 % in PLA is the most suitable blend system in terms of compatibility and high barrier properties.

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“…Work by Tsuji et al 13 has investigated the effect of crystallinity on water permeability of PLA and found a monotonic decrease with increasing crystallinity from 0% to 20%, which then levelled off. In a recent publication, Tsuji and Tsuruno 14 reported further studies of water vapour permeability of poly(L-lactic acid)/poly(D-lactic acid) blend films in which crystallinity ranged from 0% to 30%.…”

Section: Water Vapour Permeability Measurementsmentioning

confidence: 99%

“…The effects of molecular characteristics and crystallinity on the water vapour permeability of poly(lactides) has been researched by Tsuji et al 13,14 It was reported that WVTR decreased monotonically with increasing crystallinity up to 20% and levelled off at 30% due to the higher resistance of "restricted" amorphous regions. Another study by Cocca et al 15 has reported water vapour permeability of poly(l-lactide) with crystallinity varying between 33% and 45%.…”

Section: Introductionmentioning

confidence: 99%

Water vapour permeability of poly(lactic acid): Crystallinity and the tortuous path model

Zhang

Thomas

2014

Journal of Applied Physics

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Citation: DUAN, Z. and THOMAS, N.L., 2014 The water vapour transmission rates (WVTR) through samples of polylactic acid of different crystallinities have been measured. Three different grades of commercial poly(lactic acid) (PLA) were used with different ratios of L-lactide and D-lactide to give a range of crystallinities from 0% to 50%. Sheets of PLA were prepared by melt compounding followed by compression moulding and annealing at different temperatures and for different times to give the range of crystallinities required. Crystallinity was measured by differential scanning calorimetry and the morphology of the samples was observed under crossed polars in a transmitted light microscope. Water vapour transmission rates through the films were measured at 38 C and at a relative humidity of 90%. It was found that the measured values of WVTR decreased linearly with increasing crystallinity of the PLA from 0% to 50%. The results are discussed in terms of the effect of crystallinity on solubility and shown to fit the "Tortuous Path Model." The model was also successfully used to explain published data on water permeability of polyethylene terephthalate. V C 2014 AIP Publishing LLC.

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Water vapor permeability of poly(lactide)s: Effects of molecular characteristics and crystallinity

Cited by 117 publications

References 29 publications

Physical and mechanical properties of PLA, and their functions in widespread applications — A comprehensive review

Physical and mechanical properties of PLA, and their functions in widespread applications — A comprehensive review

Blending of Polyhydroxybutyrate-co-valerate with Polylactic Acid for Packaging Applications – Reflections on Miscibility and Effects on the Mechanical and Barrier Properties

Water vapour permeability of poly(lactic acid): Crystallinity and the tortuous path model

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