Improvement in Mechanical Properties and Heat Resistance of PLLA-b-PEG-b-PLLA by Melt Blending with PDLA-b-PEG-b-PDLA for Potential Use as High-Performance Bioplastics

Pasee, Supasin; Baimark, Yodthong

doi:10.1155/2019/8690650

Cited by 7 publications

(3 citation statements)

References 39 publications

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“…It should be suggested that the sc-Xc,DSC increased with the PDLA-PEG-PDLA ratio. The higher PDLA-PEG-PDLA ratio gave a more substantial PDLA fraction for stereocomplex formation with PLLA end blocks of PLLA-PEG-PLLA [11]. The result shows that all the blended films with tetracycline were higher the percentage of homo and stereocomplex crystalline than the film without tetracycline.…”

Section: Thermal Transition Propertiesmentioning

confidence: 89%

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Polylactide-b-Poly(Ethylene Glycol)-b-Polylactide Triblock Copolymer Films for Using as Drug Delivery Carriers

Intaravichien

Srihanam

2020

MSF

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The objective of this work was to characterize the stereocomplex film properties prepared from different ratios of PLLA-PEG-PLLA/PDLA-PEG-PDLA. All ratios used were homogeneous in texture with a small size of pores which increased as the PDLA-PEG-PDLA ratio was increased. The PDLA-PEG-PDLA supported the increase of stereocomplexation of the film's texture. With tetracycline, the increasing of pores on the film surfaces were observed, but not interfered stereocomplexation of the films. However, the drug helped to enhance the homo-crystalline formation. The stereocomplex structure of films both with and without tetracycline have completely formed when the ratios of PLLA-PEG-PLLA/PDLA-PEG-PDLA used were 60/40 and 70/30, respectively. The rate of drug release trends to decrease when the ratio of PDLA-PEG-PDLA increased. This indicated that the different ratios of PLLA-PEG-PLLA/PDLA-PEG-PDLA might be affected by the properties of film as well as the drug release pattern. The obtained results might be applied for designing film for specific proposing, especially as a hydrophobic drug carrier for drug controlled-release.

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Section: Thermal Transition Propertiesmentioning

confidence: 89%

“…The 93 and 142 J/ g are theoretical 100%Xc for homocrystallites and stereocomplex crystallites, respectively. WPLA is a weight fraction of PLA that is 0.83 [11].…”

Section: Characterizationmentioning

confidence: 99%

Polylactide-b-Poly(Ethylene Glycol)-b-Polylactide Triblock Copolymer Films for Using as Drug Delivery Carriers

Intaravichien

Srihanam

2020

MSF

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“…Poly(L-lactide)-b-polyethylene glycol-b-poly(L-lactide) triblock copolymers (PLLA-PEG-PLLA) showed greater flexibility and faster crystallization-rate than PLLA due to flexibility of PEG middleblocks causing an enhanced plasticizing effect [10,11]. However, the heat resistance of PLLA-PEG-PLLA was still poor [12]. The heat resistance of PLLA and PLLA-PEG-PLLA is directly related to degree of crystallinity [13−15].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Mold Conditions on Heat Resistance of Injection-Molded Stereocomplex Polylactide-b-polyethylene Glycol-b-Polylactide Bioplastic

Baimark¹,

Rungseesantivanon²,

Prakymoramas³

2021

Mater. Plast.

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The effect of mold conditions was investigated in terms of mold temperature (30oC and 90oC) and cooling time (30 s and 60 s) on the heat resistance of injection-molded bars for stereocomplex polylactide-b-polyethylene glycol-b-polylactide (scPLA-PEG-PLA). Comparative study was performed for poly(L-lactide) (PLLA) and PLLA-b-PEG-b-PLLA (PLLA-PEG-PLLA). scPLA-PEG-PLA was 90/10 (w/w) PLLA-PEG-PLLA/poly(D-lactide) blend. scPLA-PEG-PLA exhibited the easiest crystallization upon cooling scan as shown by differential scanning calorimetry (DSC). Higher mold-temperature and longer cooling-time induced higher degree of crystallinity as assessed by X-ray diffractometry (XRD) except for PLLA bars. The heat resistance of both PLLA-PEG-PLLA and scPLA-PEG-PLA bars was improved with increased mold-temperature and cooling-time as shown by dynamic mechanical analysis (DMA), vicat softening temperature (VST) and heat distortion-resistance tests except for PLLA bars. In conclusion, the heat resistance of injection-molded bars prepared at 90˚C mold temperature was in the order scPLA-PEG-PLA ] PLLA-PEG-PLLA ] PLLA. The results suggested that flexible PLLA-PEG-PLLA and scPLA-PEG-PLA with high degrees of crystallinity were successfully obtained by injection molding for use as good heat-resistant bioplastic products.

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Preparation of flexible poly(l-lactide)-b-poly(ethylene glycol)-b-poly(l-lactide)/talcum/thermoplastic starch ternary composites for use as heat-resistant and single-use bioplastics

Thongsomboon

Srihanam

Baimark

2023

International Journal of Biological Macromolecules

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Improvement in Mechanical Properties and Heat Resistance of PLLA-b-PEG-b-PLLA by Melt Blending with PDLA-b-PEG-b-PDLA for Potential Use as High-Performance Bioplastics

Cited by 7 publications

References 39 publications

Polylactide-b-Poly(Ethylene Glycol)-b-Polylactide Triblock Copolymer Films for Using as Drug Delivery Carriers

Polylactide-b-Poly(Ethylene Glycol)-b-Polylactide Triblock Copolymer Films for Using as Drug Delivery Carriers

The Effect of Mold Conditions on Heat Resistance of Injection-Molded Stereocomplex Polylactide-b-polyethylene Glycol-b-Polylactide Bioplastic

Preparation of flexible poly(l-lactide)-b-poly(ethylene glycol)-b-poly(l-lactide)/talcum/thermoplastic starch ternary composites for use as heat-resistant and single-use bioplastics

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