Preparation and Characterization of Poly(Lactic Acid) (PLA)/Polyoxymethylene (POM) Blends

Haniff, Muhammad Aniq Shazni Mohammad; Bijarimi, Mohd; Zaidi,; Ahmad, Sahrim

doi:10.4028/www.scientific.net/msf.917.3

Cited by 16 publications

(9 citation statements)

References 8 publications

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“…However, PLA has some disadvantages such as high brittleness and poor gas barrier property, which could limit its application in film manufacturing and package. Therefore, many strategies have been applied on PLA . Some studies showed that PLA and PPC are complementary to each other in terms of performance, and improved mechanical and oxygen barrier properties can be obtained.…”

Section: Introductionmentioning

confidence: 99%

Effects of chain extender and uniaxial stretching on the properties of PLA/PPC/mica composites

Xia

Shi

Zhou

et al. 2019

Polymers for Advanced Techs

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Poly(lactic acid) (PLA)/poly(propylene carbonate) (PPC)/mica composites with different amount of chain extender (CE) were melt compounded and then processed via two routes (compression molding and uniaxial stretching) into sheets and films. The tensile, thermal, and oxygen barrier properties of all the samples were investigated.Tensile test showed that the tensile strength and elongation at break of all films were much higher than that of all sheets, especially for PLA/PPC/mica with 0.9-wt% CE composite (CM 3 (CE) 0.9 ) film. The crystallinity of all films increased significantly after uniaxial stretching of sheet samples. The Fourier transform infrared spectroscopy (FTIR) results proved the chemical reactions occurred between PLA/PPC and CE.Scanning electron microscope (SEM) analysis revealed that compatibility and interfacial adhesion of all samples were improved after adding mica and CE, and they were further enhanced after uniaxial stretching. The addition of CE was not favorable to improve the oxygen barrier performance of PLA/PPC/mica sheet samples. However, the oxygen barrier performance of film samples was significantly improved after uniaxial stretching. In particular, the CM 3 (CE) 0.9 film had the lowest oxygen permeability coefficient (1.4 × 10 −15 cm 3 ·cm/(cm 2 ·s·Pa)), and this was the best oxygen barrier properties reported in the literature for PLA-based composites, which was comparable with PA film. This study demonstrated the high efficiency of uniaxial stretching on improvement of properties of composites, which would promote the application of biodegradable polymers in oxygen sensitive food packaging.

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Section: Introductionmentioning

confidence: 99%

Effects of chain extender and uniaxial stretching on the properties of PLA/PPC/mica composites

Xia

Shi

Zhou

et al. 2019

Polymers for Advanced Techs

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“…These characteristics and properties make PLA attractive to be used as a blend component or as a matrix in composites. 2,3 Nevertheless, several adverse factors restrict the use of PLA alone, such as low crystallization rate, low thermal stability and impact resistance, brittleness and poor long-term durability due to hydrolysis degradation. 4,5 The application and extensive research on PLA blends with petroleum-based, PLA blends with bio-based polymer and PLA bio-composites have been reported for biomedical, 1 automotive, 6 textile, 7 3D printing, 8 and food packaging.…”

Section: Introductionmentioning

confidence: 99%

“…4,5 The application and extensive research on PLA blends with petroleum-based, PLA blends with bio-based polymer and PLA bio-composites have been reported for biomedical, 1 automotive, 6 textile, 7 3D printing, 8 and food packaging. 9 NatureWorks is one of the largest worldwide producers for PLA, 1 and a number of previous works on PLA nanocomposites have been focused on the low melting flow rate of PLA 2000 series 3,[10][11][12] and PLA 4000 series. 4,13,14 In contrast, few literature studies at present reported on the high melting flow rate of PLA 3000 series with clay nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Thermal, water absorption, and mechanical characterizations of polylactide based nanocomposites: Comparison between sodium and modified montmorillonite as reinforcement materials

Omar

Chen

Shahdan

et al. 2021

J of Applied Polymer Sci

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The research on the polymer silicate layer nanocomposites is currently focusing on maximizing the polymer-filler interface interaction. This study aimed to elucidate the effect of two different types of montmorillonite (MMT), which were Cloisite sodium (CNa) and Cloisite 10A (C10A), on the thermal, water absorption, and mechanical performances of polylactide (PLA) nanocomposites.Nanocomposites with different clay loadings from 1 to 7 wt% were fabricated by melt intercalation in a twin-screw extruder. XRD analysis showed an intercalated structure for PLA/C10A at 1 and 3 wt% loadings. From TGA analysis, the initial thermal degradation temperature for PLA/C10A at 1 and 3 wt% showed promising enhancement in thermal stability. DSC results also confirmed that both nanocomposites at clay loadings less than 5 wt% improved thermal properties and crystallinity compared to neat PLA. Storage modulus and tan δ for PLA/C10A shifted towards higher temperature. Water absorption intakes of PLA/C10A at 1 and 3 wt% loadings were reduced by 42% and 39%, respectively. For PLA/C10A at the optimum loading of 3 wt%, tensile strength improved by 21% and strain by 17%. This loading exhibited the finest morphological structure.

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“…Poly(lactic acid) (PLA), as an environmentally friendly thermoplastic polyester with excellent reproducibility of raw materials, good biocompatibility, biodegradability [1][2][3][4], and nontoxicity to the human body [5,6], is widely used in tissue engineering, drug controlled release, and packaging materials [7][8][9][10], whereas its poor thermal stability, slow crystallization rate, high crystallinity, and poor hydrophilicity confine its application scope [11][12][13]. To overcome the mentioned shortcomings, the performance of PLA materials can be improved through physical blending [14,15], copolymerization [16][17][18], the addition of a nucleation agent [19], and preparation of nanoparticle [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Properties of Stereocomplex of Poly(lactic acid) and Its Amphiphilic Copolymers Containing Glucose Groups

Zhu

Cao

et al. 2020

Polymers

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The stereocomplex of poly(lactic acid) containing glucose groups (sc-PLAG) was prepared by solution blending from equal amounts of poly(l-lactic acid) (PLLA) and poly(d-lactic acid-co-glucose) (PDLAG), which were synthesized from l- and d-lactic acid and glucose by melt polycondensation. The methods, including 1H nuclear magnetic resonance spectroscopy (1H NMR), gel permeation chromatography (GPC), differential scanning calorimetry (DSC), X-ray diffraction (XRD), fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), polarizing microscope (POM), scanning electron microscope (SEM), transmission electron microscope (TEM), and contact angle were used to determine the effects of the stereocomplexation of enantiomeric poly(lactic acid) (PLA) units, the amphiphilicity due to glucose residues and lactic acid units, and the interaction of glucose residues with lactic units on the crystallization performance, hydrophilicity, thermal stability, and morphology of samples. The results showed PDLAG was multi-armed, and partial OH groups of glucose residues in PDLAG might remain unreacted. The molecular weight (Mw), dispersity (Ɖ), and glucose proportion in the chain of PDLAG thereby had significant effects on sc-PLAG. There were the stereocomplexation of enantiomeric lactic units and the amphiphilic self-assembly of PDLAG in sc-PLAG, which resulted in glucose groups mainly in the surface phase and lactic units in the bulk phase. The sc-PLAG only possessed the stereocomplex crystal owing to the interaction between nearly equimolar of l-lactic units of PLLA and d-lactic units of PDLAG, and had no homo-crystallites of l- or d-lactic units, which improved the melting temperature (Tm) of sc-PLAG about 50 °C higher than that of PLLA. Glucose groups in sc-PLAG played an important role by forming heterogeneous nucleation, promoting amphiphilic self-assembly, and affecting the ordered arrangement of lactic units. The glass transition temperature (Tg), the melting temperature (Tm), crystallinity, crystallization rate, and water absorption of sc-PLAG showed similar changes with the increased glucose content in feeding. All these parameters increased at first, and the maximum appeared as glucose content in feeding about 2%, such as the maximum crystallinity of 48.8% and the maximum water absorption ratio being 11.7%. When glucose content in feeding continued increasing, all these performances showed a downward trend due to the decrease of arrangement regularity of lactic acid chains caused by glucose groups. Moreover, the contact angle of sc-PLAG decreased gradually with the increased glucose content in feeding to obtain the minimum 77.5° as the glucose content in feeding being 5%, while that of PLLA was 85.0°. The sc-PLAG possessed a regular microsphere structure, and its microspheres with a diameter of about 200 nm could be observed. In conclusion, sc-PLAG containing proper glucose amount could effectively enhance the crystallinity, hydrophilicity, and thermal stability of PLA material, which is useful for drug delivery, a scaffold for tissue engineering, and other applications of biomedicine.

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Preparation and Characterization of Poly(Lactic Acid) (PLA)/Polyoxymethylene (POM) Blends

Cited by 16 publications

References 8 publications

Effects of chain extender and uniaxial stretching on the properties of PLA/PPC/mica composites

Effects of chain extender and uniaxial stretching on the properties of PLA/PPC/mica composites

Thermal, water absorption, and mechanical characterizations of polylactide based nanocomposites: Comparison between sodium and modified montmorillonite as reinforcement materials

Preparation and Properties of Stereocomplex of Poly(lactic acid) and Its Amphiphilic Copolymers Containing Glucose Groups

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