Non-isothermal crystallization kinetics of sucrose palmitate reinforced poly(lactic acid) bionanocomposites

Valapa, Ravibabu; Hussain, Sameer; Iyer, Parameswar Krishnan; Pugazhenthi, G.; Katiyar, Vimal

doi:10.1007/s00289-015-1468-3

Cited by 13 publications

(6 citation statements)

References 53 publications

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“…The uneven dispersion of MCC in the matrix may also have resulted in easy propagation of oxygen into the matrix. 35–39…”

Section: Resultsmentioning

confidence: 99%

“…The uneven dispersion of MCC in the matrix may also have resulted in easy propagation of oxygen into the matrix. [35][36][37][38][39] The TGA/DTG analysis for the CNC based composite indicated that degradation was shifted to a lower temperature range as compared to the MCC based composite (Figure 4(a)). Addition of 1, 3 and 5 wt% CNC into PLA-PEG (10 wt%) the degradation onset temperatures were at 232.2 C, 226.2 C and 220.3 C, respectively (Table 3).…”

Section: Tga Analysismentioning

confidence: 99%

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Studies on thermal and degradation kinetics of cellulose micro/nanoparticle filled polylactic acid (PLA) based nanocomposites

Bhiogade

Kannan

2021

Polymers and Polymer Composites

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The aim of this work is to understand the effect of concentration of plasticizer, particle size and wt% of nanoparticles on nanocomposites by fabricating poly lactic acid (PLA) based bio-nanocomposites. The bio-nanocomposites were prepared by a solution casting method with PLA as the matrix, chloroform as solvent and poly ethylene glycol (PEG) as plasticizer. Microcrystalline cellulose (MCC) and cellulose nanocrystal (CNC) were used as reinforcements in 1, 3 and 5 wt% to modify the properties of the bio-nanocomposite. The degradation kinetics of the PLA based composites were determined by using the Coats-Redfern equation over the range of 0-5 wt% of MCC and CNC. Fabricated PLA based composite films were analyzed by differential scanning calorimetry (DSC), thermo gravimetric analysis (TGA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS) and field emission scanning electron microscopy (FE-SEM). The analyses showed that the amount of PEG, MCC and CNC affected the degree of crystallinity. DSC results showed that the MCC/CNC content level affected the degree of crystallinity compared to neat PLA. The FTIR showed a free hydroxyl group (−OH) present in the system. The TGA analysis showed that the PLA/MCC3%/ PEG 10% composition had the highest stability compared to the other compositions but less than neat PLA.

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“…The uneven dispersion of MCC in the matrix may also have resulted in easy propagation of oxygen into the matrix. 35–39…”

Section: Resultsmentioning

confidence: 99%

Section: Tga Analysismentioning

confidence: 99%

Studies on thermal and degradation kinetics of cellulose micro/nanoparticle filled polylactic acid (PLA) based nanocomposites

Bhiogade

Kannan

2021

Polymers and Polymer Composites

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“…Most routine examples include clay, talc, carbon black, etc . Apart from these, few renewable materials have also been integrated like cellulose nanocrystals, chitosan, sucrose palmitate, etc . The crystallization of polymer affects the material properties and also process control which is indispensable part of polymer processing .…”

Section: Introductionmentioning

confidence: 99%

“…[18][19][20][21] Apart from these, few renewable materials have also been integrated like cellulose nanocrystals, chitosan, sucrose palmitate, etc. 1,22,23 The crystallization of polymer affects the material properties and also process control which is indispensable part of polymer processing. 19 Very few have reported the impact of silk or silk derivatives on crystallization properties of PLA.…”

Section: Introductionmentioning

confidence: 99%

Crystallization kinetics, morphology, and hydrolytic degradation of novel bio‐based poly(lactic acid)/crystalline silk nano‐discs nanobiocomposites

Patwa

Kumar

Katiyar

2018

J of Applied Polymer Sci

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In this work, novel biodegradable crystalline silk nano‐discs (CSNs) having a disc‐like morphology have been utilized for fabrication of poly(lactic acid) (PLA) nanocomposites by melt‐extrusion. The main focus is to investigate the effect of CSN on isothermal melt crystallization kinetics, spherulitic growth rates, morphology, and hydrolytic degradation of PLA. Spherulitic morphology and growth rates are examined over a wide range of crystallization temperatures (90–120 °C). With incorporation of CSN, the isothermal crystallization kinetics of PLA/CSN increases, however, the crystallization mechanism remains unaltered. The apparent activation energy and surface energy barrier for crystallization process decreases upon addition of CSNs. At lower isothermal crystallization temperatures (Tc) viz. (90–100 °C), reduced growth rates of PLA spherulites is observed. Both PLA and PLA/CSN exhibit highest crystallization rates at around ∼107 °C. The hydrolytic degradation rates calculated from molecular weight reduction shows that PLA/CSN nanocomposites' degradation rates are lower as compared to PLA in acidic, neutral, and alkaline media at pH = 2, 7, and 12, respectively, due to hydrophobic nature of CSN. Scanning electron microscopy study demonstrated the surface erosion mechanism of hydrolytic degradation of PLA and PLA/CSN nanocomposites. This work provides valuable insight for the application and reclamation of PLA/CSN bionanocomposites in moist and wet working environments. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46590.

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“…During the second heating cycle, a high single melting peak was observed, which showed a depiction of crystals performing in a stable and uniform manner as a result of the lack of varied distribution of crystals through melting. 56 Lower peaks observed in T m can be ascribed to the formation of unstable crystals from varied distribution as well as the impediment filler has causing inhomogeneous crystal thickness in polymers. 57 T c for PBSA marginally changed with the addition of 25 wt% WSP and 25 wt% starch.…”

Section: Differential Scanning Calorimetrymentioning

confidence: 99%

Injection molding of biodegradable polyester blends filled with mineral and sustainable fillers: Performance evaluation

McNeill,

Pal,

Mohanty

et al. 2024

J of Applied Polymer Sci

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This research focuses on the melt processing of biocomposites from a biodegradable polymer blend mixed with hybrid fillers through injection molding technique. An optimized blend ratio (60/40 wt%) poly(butylene succinate‐co‐butylene adipate) (PBSA) and poly(butylene adipate‐co‐terephthalate) (PBAT) demonstrated promising results after blending with a mixture of walnut shell powder (WSP), corn starch and talc in various proportions for use in rigid packaging. The addition of hybrid fillers (i) 10% WSP with 15% talc and (ii) 5% WSP with 5% starch and 15% talc to the polymer blend (60%PBSA/40%PBAT) improved tensile modulus (160% and 162%, respectively) and flexural modulus (147% and 153%, respectively) because of the dispersion of stiffer talc and WSP. Following the addition of fillers, tensile strength of the composites decreased. However, flexural strength improved significantly after filler introduction because of better stress transfer ability. Rheological analysis of filled composites with starch or WSP (25%) depicted similar characteristics of the polymer blend, indicating lower viscosity than hybrid composites. The abundant hydroxyl groups in starch explained the increased water absorption and decreased contact angle compared with other composites. This research's novelty encompasses utilizing low‐cost biomasses with mineral filler into an under‐researched biodegradable polymer blend suitable for single‐use rigid packaging applications.

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Non-isothermal crystallization kinetics of sucrose palmitate reinforced poly(lactic acid) bionanocomposites

Cited by 13 publications

References 53 publications

Studies on thermal and degradation kinetics of cellulose micro/nanoparticle filled polylactic acid (PLA) based nanocomposites

Studies on thermal and degradation kinetics of cellulose micro/nanoparticle filled polylactic acid (PLA) based nanocomposites

Crystallization kinetics, morphology, and hydrolytic degradation of novel bio‐based poly(lactic acid)/crystalline silk nano‐discs nanobiocomposites

Injection molding of biodegradable polyester blends filled with mineral and sustainable fillers: Performance evaluation

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