Preparation of modified starch‐grafted poly(lactic acid) and a study on compatibilizing efficacy of the copolymers in poly(lactic acid)/thermoplastic starch blends

Wootthikanokkhan, Jatuphorn; Kasemwananimit, P.; Sombatsompop, Narongrit; Kositchaiyong, Apisit; Ayutthaya, Siriorn Isarankura Na; Kaabbuathong, Narin

doi:10.1002/app.36896

Cited by 67 publications

(54 citation statements)

References 19 publications

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“…A titration method 19 was used to determine the percentage of MA grafted on PLA. A titration method 19 was used to determine the percentage of MA grafted on PLA.…”

Section: Methodsmentioning

confidence: 99%

From microstructure to mechanical properties of compatibilized polylactide/thermoplastic starch blends

Nezamzadeh

Ahmadi

Taromi

2017

J of Applied Polymer Sci

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Bio-degradable polymer blends of polylactic acid/thermoplastic starch (PLA/TPS) were prepared via direct melt blending varying order of mixing of ingredients fed into the extruder. The effect of interface interactions between PLA and TPS in the presence of maleic anhydride (MA) compatibilizer on the microstructure and mechanical properties was then investigated. The prepared PLA/ TPS blends were characterized by scanning electron microscopy, differential scanning calorimetry (DSC), tensile, and rheological measurements. Morphology of PLA/TPS shows that the introduction of MA into the polymer matrix increases the presence of TPS at the interface region. DSC results revealed the reduction of glass transition temperature of PLA with contributions from both TPS and MA. The crystallization temperature was decreased by the addition of MA leading to reduction of overall crystallization of PLA/TPS blend. The mechanical measurements show that increasing MA content up to 2 wt % enhances the modulus of PLA/TPS more than 45% compared to the corresponding blends free of MA compatibilizer.

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“…A titration method 19 was used to determine the percentage of MA grafted on PLA. A titration method 19 was used to determine the percentage of MA grafted on PLA.…”

Section: Methodsmentioning

confidence: 99%

From microstructure to mechanical properties of compatibilized polylactide/thermoplastic starch blends

Nezamzadeh

Ahmadi

Taromi

2017

J of Applied Polymer Sci

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“…This may be due to the difficulties in preparation of specific copolymers such as the compatibilizer. Maleated starch grafted PLA (PLA‐ g ‐MTPS) has been prepared as compatibilizer for a PLA/TPS blend . In the presence of PLA‐ g ‐MTPS copolymer, the PLA/TPS blend morphology was improved by reducing coalescence of the starch phase in PLA matrix.…”

Section: Principle and Mechanism Of Ex Situ Compatibilization Of Polymentioning

confidence: 99%

Biodegradable compatibilized polymer blends for packaging applications: A literature review

Muthuraj

Misra

Mohanty

2017

J of Applied Polymer Sci

307

183

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The majority of materials used for short-term and disposable packaging application are non-biodegradable which are not satisfying the demands in environmental safety and sustainability. Biodegradable polymers are an alternative for these nonbiodegradable materials. The biodegradable polymeric materials can degrade in a reasonable time period without causing environmental problems. However, biodegradable polymers possess some limitations such as comparatively high cost, insufficient mechanical performances, and inferior thermal stability to extend their widespread application in packaging industry. To overcome these limitations, one of the most commonly used strategies is melt blending of dissimilar biodegradable polymers. Unfortunately, most of the biodegradable polymer blends exhibit insufficient performance because they are thermodynamically immiscible as well as exhibit poor compatibility between the blended components. It has been established that the compatibilization is a well-known strategy to improve the performances of the immiscible biodegradable polymer blends by enhancing the adhesion between the phases. As a result, recent studies focus on various compatibilizers to enhance the performances of the resulting biodegradable polymer blends. This review summarizes the recent developments on a variety of biodegradable polymer blends compatibilized by melt processing with a main focus of ex situ and in situ compatibilization strategies.

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“…The presence of COOH groups in the m-PEG was evaluated using back titration technique according to Wootthikanokkhan et al (2012).…”

Section: Characterizationmentioning

confidence: 99%

“…Other compatibilizers such as maleic anhydride (MA) Zhang & Sun, 2004), PLA-g-MTPS (Wootthikanokkhan et al, 2012), PLA-g-amylose (Schwach, Six, & Avérous, 2008) have also been reported in literatures.…”

Section: Introductionmentioning

confidence: 99%

A new approach in compatibilization of the poly(lactic acid)/thermoplastic starch (PLA/TPS) blends

Akrami

Ghasemi

Azizi

et al. 2016

Carbohydrate Polymers

208

137

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a b s t r a c tIn this study, a new compatibilizer was synthesized to improve the compatibility of the poly(lactic acid)/thermoplastic starch blends. The compatibilizer was based on maleic anhydride grafted polyethylene glycol grafted starch (mPEG-g-St), and was characterized using Fourier transform infrared spectroscopy (FTIR), dynamic mechanical thermal analysis (DMTA) and back titration techniques. The results indicated successful accomplishment of the designed reactions and formation of a starch cored structure with many connections to m-PEG chains. To assess the performance of synthesized compatibilizer, several PLA/TPS blends were prepared using an internal mixer. Consequently, their morphology, dynamic-mechanical behavior, crystallization and mechanical properties were studied. The compatibilizer enhanced interfacial adhesion, possibly due to interaction between free end carboxylic acid groups of compatibilizer and active groups of TPS and PLA phases. In addition, biodegradability of the samples was evaluated by various methods consisting of weight loss, FTIR-ATR analysis and morphology. The results revealed no considerable effect of compatibilizer on biodegradability of samples.

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Preparation of modified starch‐grafted poly(lactic acid) and a study on compatibilizing efficacy of the copolymers in poly(lactic acid)/thermoplastic starch blends

Cited by 67 publications

References 19 publications

From microstructure to mechanical properties of compatibilized polylactide/thermoplastic starch blends

From microstructure to mechanical properties of compatibilized polylactide/thermoplastic starch blends

Biodegradable compatibilized polymer blends for packaging applications: A literature review

A new approach in compatibilization of the poly(lactic acid)/thermoplastic starch (PLA/TPS) blends

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