Effect of different plasticizers on the properties of bio-based thermoplastic elastomer containing poly(lactic acid) and natural rubber

Tanrattanakul, Varaporn; Bunkaew, P.

doi:10.3144/expresspolymlett.2014.43

Cited by 59 publications

(34 citation statements)

References 24 publications

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“…However, some of the PLA properties limit its applicability, mainly when considering low thermal stability at processing temperatures, brittleness and relatively low impact strength . One of the ways to improve PLA properties is the incorporation of additives (such as plasticizers) into the polymer . Triacetine (glycerol triacetate, TAC) is a common low molecular weight compound which has proved to be an effective plasticizer when blended with PLA.…”

Section: Introductionmentioning

confidence: 99%

Morphology and molecular mobility of plasticized polylactic acid studied using solid‐state ¹³C‐ and ¹H‐NMR spectroscopy

Kovaľaková

Olčák

Hronský

et al. 2016

J of Applied Polymer Sci

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MAS 13 C-NMR measurements were used for the study of morphology and molecular mobility in amorphous quenched and triacetine-plasticized PLA samples and PLA samples which underwent cold crystallization during annealing at 80 and 100 8C. The single pulse MAS 13 C-NMR spectra indicate that plasticizer promotes cold crystallization which results in the decrease of the temperature of crystallization and formation of more perfect crystalline domains. The T 1 ( 13 C) spin-lattice relaxation times show that the presence of plasticizer molecules leads to an increase of local mobility in PLA chains but plasticized PLA after annealing at 100 8C shows more rigid structure. The series of broad line 1 H-NMR spectra performed at temperatures up to 100 8C provided information on the changes in relaxation processes and morphology of the studied samples. The interpretation of the results obtained using the techniques of NMR spectroscopy were supported by WAXD and DSC measurements.

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Section: Introductionmentioning

confidence: 99%

Morphology and molecular mobility of plasticized polylactic acid studied using solid‐state ¹³C‐ and ¹H‐NMR spectroscopy

Kovaľaková

Olčák

Hronský

et al. 2016

J of Applied Polymer Sci

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“…Many plasticisers are known for improving the ductility of PLA, such as poly(ethylene glycol), 35 tributyl citrate, tributyl acetyl citrate, triacetin or glycerol triacetate and triethyl acetyl citrate. [36][37][38][39][40] In this study USE was selected because it significantly improved elongation at the point of break in comparison with those of other plasticisers had been recorded. 41 Soybean oil contains 10 wt% palmitic acid, 25 wt% oleic acid, 51 wt% linoleic acid and 7 wt% linolenic acid.…”

Section: Methodsmentioning

confidence: 99%

Complex poly(lactic acid)-based biomaterial for urinary catheters: I. Influence of AgNP on properties

Raluca¹,

Bogdán

TudorachiNiţă³

et al. 2016

Bioinspired, Biomimetic and Nanobiomaterials

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The present study focused on the development of biocompatible antimicrobial/antioxidant biodegradable bionanocomposite renewable resources based on poly(lactic acid) (PLA) plasticised with epoxidised soybean oil. To the main PLA matrix hydrolysed collagen (HC) (to enhance biocompatibility), vitamin E (as antioxidant agent) and silver (Ag) nanoparticles (NPs) (for imparting antimicrobial properties for medical applications and also for active packaging) were incorporated. The blends were produced by using the classical technological flow of melt processing.The presence of the additives in the PLA matrix improved the processability and flexibility and slightly decreased the thermal properties. The specific interactions of silver NPs with the other components of nanocomposites, mainly with HC protein and vitamin E (by ionic and other types of secondary bonds), led to a better HC and vitamin E dispersion in the samples with a higher silver content (1·5%), which further caused the enhancement of the mechanical properties for high silver NP concentration. Therefore, the silver NPs were successfully embedded into the polymer matrix. The aim of this research was to improve the flexibility, biocompatibility and functionality of PLA and to obtain bionanocomposites destined for medical applications such as catheters. This first part of research deals with mechanical and thermal characterisation correlated with morphological features. Notation d 2 dimension coefficient according with Avrami-Erofeev model E 1 ,E 2 activation energies for each step n dimensional nucleation Avrami-Erofeev reaction model n 1 ,n 2 reaction orders R correlation coefficient s thermal process in one step T 10 temperature corresponding to 10 wt% mass loss T 50 temperature corresponding to 50 wt% mass loss T cc cold crystallization temperature T g glass transition temperature T m melting temperature T onset onset temperature of each thermogravimetric step TQ 1min torque after 1 min of melt processing TQ 5min torque after 5 min of melt processing TQ fin torque at end of melt processing TQ max maximum torque value on the torque-time curve W mass loss for each thermogravimetric stage W r,500°C residual mass loss DC p specific heat capacity DH cc cold crystallization enthalpy DH m melting enthalpy

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“…Blends of PLA with elastomers and thermoplastics including natural rubber, isoprene rubber, nitrile rubber, poly(hydroxyl butyrate), poly(vinyl acetate), poly(propylene), and polyacrylates have been extensively studied. Song et al .…”

Section: Introductionmentioning

confidence: 99%

Investigation of miscibility and phase structure of a novel blend of poly(lactic acid) (PLA)/acrylic rubber (ACM) and its nanocomposite with nanosilica

Hesami

Jalali‐Arani

2017

J of Applied Polymer Sci

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In this work, a novel polymer blend containing poly(lactic acid) (PLA) as a biocompatible and biodegradable thermoplastic and acrylic rubber (ACM) is prepared and the miscibility and phase structure of the blend and its nanocomposite (PLA/ACM/nanosilica) are investigated through theoretical and experimental methods. To predict the phase diagram of the blend, a compressible regular solution model was employed, in which an upper critical solution temperature was observed. The model predicted that PLA/ACM blends are immiscible over the whole composition range at temperatures below 260 °C. Performing scanning force microscopy on the blend showed phase separated structures for the blends containing different amounts of the PLA and ACM. This was in accordance with the results of dynamic mechanical analysis, which revealed two distinct glass transition temperatures for the studied blends. The effect of nanometer sized silica particle on morphology and rheological properties of these blends was also investigated. Scanning force microscopy results showed much reduction of droplet size in the blends containing 2 wt % nanosilica. This was attributed to the suppression effect of nanosilica on the droplets coalescences. Rheological measurements confirmed the interaction of both components with the silica nanofiller. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45499.

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Effect of different plasticizers on the properties of bio-based thermoplastic elastomer containing poly(lactic acid) and natural rubber

Cited by 59 publications

References 24 publications

Morphology and molecular mobility of plasticized polylactic acid studied using solid‐state ¹³C‐ and ¹H‐NMR spectroscopy

Morphology and molecular mobility of plasticized polylactic acid studied using solid‐state ¹³C‐ and ¹H‐NMR spectroscopy

Complex poly(lactic acid)-based biomaterial for urinary catheters: I. Influence of AgNP on properties

Investigation of miscibility and phase structure of a novel blend of poly(lactic acid) (PLA)/acrylic rubber (ACM) and its nanocomposite with nanosilica

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Effect of different plasticizers on the properties of bio-based thermoplastic elastomer containing poly(lactic acid) and natural rubber

Cited by 59 publications

References 24 publications

Morphology and molecular mobility of plasticized polylactic acid studied using solid‐state 13C‐ and 1H‐NMR spectroscopy

Morphology and molecular mobility of plasticized polylactic acid studied using solid‐state 13C‐ and 1H‐NMR spectroscopy

Complex poly(lactic acid)-based biomaterial for urinary catheters: I. Influence of AgNP on properties

Investigation of miscibility and phase structure of a novel blend of poly(lactic acid) (PLA)/acrylic rubber (ACM) and its nanocomposite with nanosilica

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Product

Resources

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Morphology and molecular mobility of plasticized polylactic acid studied using solid‐state ¹³C‐ and ¹H‐NMR spectroscopy

Morphology and molecular mobility of plasticized polylactic acid studied using solid‐state ¹³C‐ and ¹H‐NMR spectroscopy