Crystallinity and dimensional stability of biaxial oriented poly(lactic acid) films

Tsai, Ching-Chun; Wu, Ren-Jye; Cheng, Hsiu-Yu; Li, Shu-Chen; Siao, Ya-Yu; Kong, Dan‐Cheng; Jang, Guang‐Way

doi:10.1016/j.polymdegradstab.2010.02.032

Cited by 98 publications

(57 citation statements)

References 34 publications

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“…In the same manner, it was revealed that the crystallinity and dimensional stability of bi-oriented PLA films are even more sensitive to the stretching and annealing temperatures [15]. In fact, the biaxial oriented PLA film with high crystallinity ensures dimensional stability at temperatures above 100°C.…”

Section: Introductionmentioning

confidence: 87%

Effect of the simultaneous biaxial stretching on the structural and mechanical properties of PLA, PBAT and their blends at rubbery state

Al-Itry

Lamnawar

Maazouz

et al. 2015

European Polymer Journal

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Section: Introductionmentioning

confidence: 87%

Effect of the simultaneous biaxial stretching on the structural and mechanical properties of PLA, PBAT and their blends at rubbery state

Al-Itry

Lamnawar

Maazouz

et al. 2015

European Polymer Journal

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“…Con la adición de Tween 80 a películas elaboradas a partir de TPS, se esperaba que disminuyera la absorción de agua de la película flexible tal como lo reportan Yokesahachart y Yoksan, (2010) y Brandelero et al, (2010) En cuanto al comportamiento térmico de las muestras (ver tabla 4 y figura 1b), se puede observar que el primer pico de fusión se presentó entre 57 ºC y 60 ºC, el cual fue asignado como la temperatura de fusión del PCL (TmPCL) (Carmona et al, 2015). El segundo pico de fusión fue registrado como la temperatura de fusión del PLA (TmPLA), que estuvo entre 151ºC y 155 ºC (Tsai et al, 2010) En los resultados obtenidos se pudo observar que la entalpía y temperatura de fusión del TPS (ΔHmTPS y TmTPS, respectivamente) para el tratamiento que contenía aditivo disminuyó con respecto a la muestra patrón, esto se puede deber a que el Tween 80 consigue interactuar con la amilosa y amilopectina, donde la presencia de un anfífilo produce una plastificación de las cadenas poliméricas provocando una pérdida de la disposición lineal de las moléculas, lo que podría generar menor temperatura de fusión (Jiménez et al, 2013) y menor estabilidad térmica. Este resultado concuerda con el estudio efectuado por Yokesahachart y Yoksan (2011), quienes evidenciaron un comportamiento similar en materiales a partir de TPS empleando diferentes sustancias anfifílicas.…”

Section: Evaluación Del Efecto Del Tween 80 En Una Película Flexible unclassified

Efecto del Aditivo Tween 80 y de la Temperatura de Procesamiento en las Propiedades Mecánicas de Tensión de Películas Flexibles Elaboradas a Partir de Almidón de Yuca Termoplástico

et al. 2016

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ResumenEl objetivo de esta investigación fue evaluar el efecto de la temperatura de procesamiento y de la concentración del aditivo Tween 80 (un surfactante hidrofílico usado como aditivo alimentario) sobre las propiedades mecánicas de tensión de una película flexible elaborada a partir de almidón de yuca termoplástico (TPS), ácido poliláctico (PLA) y policaprolactona (PCL). Se realizó un diseño experimental para determinar el perfil de temperatura y concentración de Tween 80. Posteriormente se escogió el tratamiento con los resultados más sobresalientes en las propiedades mecánicas y se comparó con una película patrón (sin Tween 80). Los valores más sobresalientes de resistencia máxima a la tensión (6.13 MPa), elongación máxima (82.83%) y módulo de elasticidad (243.06 MPa) se obtuvieron con una concentración de 0.75% y temperatura de 137.35°C. Se concluye que la adición de Tween 80 no afectó significativamente los valores en las propiedades estudiadas de las películas flexibles. Palabras clave: almidón termoplástico (TPS), ácido poliláctico (PLA), policaprolactona (PCL), Tween 80, película flexible Effect of the Additive Tween 80 and of the Process Temperature on the Mechanical Tensile Properties of Flexible Films Developed from Thermoplastic Cassava Starch AbstractThe aim of this research was to evaluate the effect of processing temperature and concentration of the additive Tween 80 on the mechanical tensile properties of a flexible film made of cassava thermoplastic starch (TPS), polylactic acid (PLA) and polycaprolactone (PCL). An experimental design was carried out to determine the temperature profile and Tween 80 concentration. Thereafter, treatment was chosen with the most outstanding results in mechanical properties and compared with a standard film (without Tween 80).The outstanding values of tensile strength (6.13 MPa), elongation (82.83%), and modulus of elasticity (243.06 MPa) were obtained with a concentration of 0.75% and temperature profile of 137.35 ° C. It is concluded that the addition of Tween 80 did not significantly affect the properties studied of the flexible films.

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“…The melting enthalpy of 100% crystalline PLA was taken as ΔH m°= 93 J/g. 25 After considering the effect of flame retardant loading (ϕ), crystallinity was calculated with eq 1: 26,27 Thermogravimetric analysis−infrared spectrometry (TG− IR) was conducted using the TGA Q500 IR thermogravimetric analyzer that was linked to the Nicolet 6700 FTIR spectrophotometer. About 5−10 mg of the sample was put in an alumina crucible and heated from 30 to 700°C.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Effect of Rare Earth Hypophosphite Salts on the Fire Performance of Biobased Polylactide Composites

Tang

Wang

Zhang

et al. 2013

Ind. Eng. Chem. Res.

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In this work, two kinds of rare earth hypophosphites (REHP), lanthanum hypophosphite (LaHP) and cerium hypophosphite (CeHP), were synthesized and characterized. Subsequently, LaHP and CeHP were added into polylactide to improve its flame retardant properties. Thermal gravimetric analysis was employed to investigate the thermal decomposition behavior of REHP and flame retardant polylactide composites (FR-PLA). The fire performance evaluated by microscale combustion calorimetry and cone calorimeter clearly demonstrated that the addition of LaHP and CeHP resulted in significant reduction of the heat release rate, low total heat release, and compact intumescent char layer. Thermogravimetric analysis− infrared spectrometry testing indicated that the addition of REHP significantly decreased the yields of pyrolysis products. Furthermore, the crystallization behaviors of FR-PLA composites were investigated by differential scanning calorimetry. The char residue of FR-PLA composites after cone calorimeter testing were also be investigated by scanning electron microscope, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. ■ INTRODUCTIONIn recent years, the increasing awareness of petroleum source and the environmental problems caused by persistent plastic wastes has impelled people to develop new ecofriendly and renewable materials to replace petroleum-based plastics. 1−3 Among these materials, polylactide (PLA) has received considerable attention because of its biodegradable, abundant renewable source, transparency and excellent mechanical properties. PLA holds tremendous promise in many fields, such as biomedical, household, engineering, packing industries, and so on. 4−8 However, like many other plastics, PLA presents poor flammability (typical limiting oxygen index (LOI) of 19.5 vol %, easily dripping in burning) in fire testing, which restricts its further development in some important fields. Therefore, it is meaningful to investigate flame-retarded PLA.It is well-known that intumescent flame retardant (IFR) shows good performance in some polymers as a halogen-free additive due to the advantage of little smoke production and low toxicity. 9 Reti et al. 10 studied the efficiency of different intumescent formulations to flame retard PLA, and the quantity of the additives has been optimized. Feng and Zhan et al. have researched different intumescent flame retardant systems for preparation of FR-PLA composites that showed good performance in the testing. 10−12 Other flame retardant additives, such as expanded graphite, 13 aluminum hydroxide, 14 and silica gel 15 have also been reported.Recently, aluminum hypophosphite (AHP) has been used as a flame retardant that has achieved effective flame retardance in polymer materials. Yang et al. found aluminum hypophosphite showed perfect flame retardancy in PET and PBT composites; 16,17 20 wt % of AHP could make glass-fiber/PBT composite reach an UL-94 V0 rating with a LOI value of 29 vol %, and 10 wt % of AHP could make glass-fiber/PET comp...

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Crystallinity and dimensional stability of biaxial oriented poly(lactic acid) films

Cited by 98 publications

References 34 publications

Effect of the simultaneous biaxial stretching on the structural and mechanical properties of PLA, PBAT and their blends at rubbery state

Effect of the simultaneous biaxial stretching on the structural and mechanical properties of PLA, PBAT and their blends at rubbery state

Efecto del Aditivo Tween 80 y de la Temperatura de Procesamiento en las Propiedades Mecánicas de Tensión de Películas Flexibles Elaboradas a Partir de Almidón de Yuca Termoplástico

Effect of Rare Earth Hypophosphite Salts on the Fire Performance of Biobased Polylactide Composites

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