Toughening polylactide with polyether-block-amide and thermoplastic starch acetate: Influence of starch esterification degree

Zhou, Linyao; Zhao, Guiyan; Feng, Yang; Yin, Jie; Jiang, Wei

doi:10.1016/j.carbpol.2015.03.022

Cited by 32 publications

(23 citation statements)

References 33 publications

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“…Commonly, polymers functionalized with maleate (nonacrylate [13][14][15][16][17][18][19] ) and glycidyl methacrylate groups (acrylate [20][21][22][23][24][25][26][27][28][29][30] ) are often employed. Additives containing these functionalities can be perfectly combined with PLA, especially if they are constituted by a common skeleton and provide polymer blends with improved ductility and strength.…”

Section: Introductionmentioning

confidence: 99%

Improvements in mechanical strength and thermal stability of injection and compression molded components based on Poly Lactic Acids

et al. 2017

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Degradable polymers are limited by their often-insufficient mechanical and thermal properties, which limit their usage to single-use packaging items at room temperature and in dry conditions. In this respect, the present work deals with the manufacture of custom-built Poly Lactic Acids (PLAs), which are designed to be compostable, suitable for food contact and are characterized by a good compromise between mechanical properties and thermal stability. A commercial grade PLA was, therefore, compounded in a twin-screw co-rotating extruder by the use of specific additives: maleated and glycidyl methacrylate PLAs as compatibilizers/chain extenders and microlamellar talc as mineral filler/nucleation promoter. After pelletizing, the resulting compounds were melt-processed by injection and compression molding.Differential scanning calorimetry, flexural tests in static machine and top-hat cylindrical flat indentations were performed to evaluate the thermal and mechanical response of the molded components. The experimental findings show that crystallization of the PLA can be controlled by fine-tuning the compound formulation as well as by properly setting the processing parameters. In addition, achievement of the appropriate crystallization degree in the polymer can lead to molded components, which exhibit improved mechanical strength and high thermal stability. K E Y W O R D Scompostable polymer, mechanical response, melt processing, molding, thermal stability

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Section: Introductionmentioning

confidence: 99%

Improvements in mechanical strength and thermal stability of injection and compression molded components based on Poly Lactic Acids

et al. 2017

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“…when compared to metals and ceramics. For instance, in tissue engineering, biodegradable polymers such as PCL, poly (L-lactic acid) (PLA), polyhydroxybutyrate (PHB), and poly (glycolic acid) (PGA) are at the core of current research activities, largely due to their biodegradability and biocompatibility [3,4]. It is generally required that a biodegradable polymer have certain attributes such as stability and durability to perform the intended functions, followed by breakdown and decomposition [5,6].…”

Section: Introductionmentioning

confidence: 99%

Effect of Polymer Concentration, Rotational Speed, and Solvent Mixture on Fiber Formation Using Forcespinning®

Obregon

Agubra

Pokhrel

et al. 2016

Fibers

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Polycaprolactone (PCL) fibers were produced using Forcespinning ® (FS). The effects of PCL concentration, solvent mixture, and the spinneret rotational speed on fiber formation were evaluated. The concentration of the polymer in the solvents was a critical determinant of the solution viscosity. Lower PCL concentrations resulted in low solution viscosities with a correspondingly low fiber production rate with many beads. Bead-free fibers with high production rate and uniform fiber diameter distribution were obtained from the optimum PCL concentration (i.e., 12.5 wt%) with tetrahydrofuran (THF) as the solvent. The addition of N, N-dimethylformamide (DMF) to the THF solvent promoted the gradual formation of beads, split fibers, and generally affected the distribution of fiber diameters. The crystallinity of PCL fibers was also affected by the processing conditions, spinning speed, and solvent mixture.

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“…Academically, the mixing efficiency of two kinds of materials is influenced by the method and micromixer type . The mechanical performance of PEBA is often enhanced by blending with other materials, such as clay, titanium microparticle fillers, electrospun poly(vinyl alcohol) fibers, polyethylene and polystyrene (PS), polylactide, nylon‐6, low‐density polyethylene, and PS . However, the hybrids of PEBA copolymers with clay, titanium microparticle fillers, or nylon‐6 generally along with addition of clay increase the tensile modulus but decreases the tensile strength and elongation at break .…”

Section: Introductionmentioning

confidence: 99%

“…However, the hybrids of PEBA copolymers with clay, titanium microparticle fillers, or nylon‐6 generally along with addition of clay increase the tensile modulus but decreases the tensile strength and elongation at break . Additionally, the polymers that are incompatible with PEBA copolymers may cause low elongation at break and low toughness . Consequently, selection of a proper material for the modification of PEBA is of high importance for the production of composites with excellence in desired elongation and toughness.…”

Section: Introductionmentioning

confidence: 99%

Improved toughness of poly(ether‐block‐amide) via melting blending with thermoplastic polyurethane for biomedical applications

Xue

Tang

Qin

et al. 2019

J of Applied Polymer Sci

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Biocompatible polyether-block-amide (PEBA) copolymers have been widely applied in invasive medical devices. Due to the high hard segment ratios and poor toughness, PEBAs generally suffer from low fracture extensibility, large brittleness, and low compliance. Modification of PEBA with thermoplastic polyurethane (TPU) elastomer via melting blending is thus needed to improve the toughness. Mechanical experiments exhibited that when the content of TPU was 3% (w/w), the elongation at break and the notched impact strength of PEBA/TPU composite were improved by 12.4 and 30.5%, respectively. Field emission scanning electron microscopy results illustrated that there existed two toughening mechanisms in PEBA/TPU composites, including the crazing with a shear-yield mechanism and the single-layer crack extension mechanism. Moreover, Fourier transform infrared spectroscopy revealed that the intermolecular interaction between PEBA and TPU was enhanced due to hydrogen bonding, leading to the tensile mechanical properties and toughness increased.

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Toughening polylactide with polyether-block-amide and thermoplastic starch acetate: Influence of starch esterification degree

Cited by 32 publications

References 33 publications

Improvements in mechanical strength and thermal stability of injection and compression molded components based on Poly Lactic Acids

Improvements in mechanical strength and thermal stability of injection and compression molded components based on Poly Lactic Acids

Effect of Polymer Concentration, Rotational Speed, and Solvent Mixture on Fiber Formation Using Forcespinning®

Improved toughness of poly(ether‐block‐amide) via melting blending with thermoplastic polyurethane for biomedical applications

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