Effect of <i>in situ</i> reaction on thermal and mechanical properties of polylactide/talc composites

Hong, Yangyang; Chen, Lijie; Song, Guolin; Bassir, David; Cheng, Simin; Shi, Xinghong; Liu, Haifeng; Tang, Guoyi

doi:10.1002/pc.24530

Cited by 12 publications

(5 citation statements)

References 43 publications

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“…The 10 wt% talc loading causes a slight shift in the DTG curves to lower temperature, indicating that the biocomposite has no observable improvement in thermal properties compared to neat PLA. 53 Incorporation of OFI-F into the PLA matrix decreases the (T onset ) and (T m ) in the PLA/OFI-F biocomposites at 526.6 K and 586.0 K for a heating rate of 5 K/min. Therefore, OFI-F decreases the decomposition temperature of PLA/OFI-F biocomposites.…”

Section: Thermogravimetric Analysismentioning

confidence: 94%

Thermal degradation kinetics of Opuntia Ficus Indica flour and talc-filled poly (lactic acid) hybrid biocomposites by TGA analysis

Gharsallah

Layachi

Louaer

et al. 2021

Journal of Composite Materials

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This paper reports the effect of lignocellulosic flour and talc powder on the thermal degradation behavior of poly (lactic acid) (PLA) by thermogravimetric analysis (TGA). Lignocellulosic flour was obtained by grinding Opuntia Ficus Indica cladodes. PLA/talc/ Opuntia Ficus Indica flour (OFI-F) biocomposites were prepared by melt processing and characterized using Wide-angle X-ray scattering (WAXS) and Scanning Electron Microscope (SEM). The thermal degradation of neat PLA and its biocomposites can be identified quantitatively by solid-state kinetics models. Thermal degradation results on biocomposites compared to neat PLA show that talc particles at 10 wt % into the PLA matrix have a minor impact on the thermal stability of biocomposites. Loading OFI-F and Talc/OFI-F mixture into the PLA matrix results in a decrease in the maximum degradation temperature, which means that the biocomposites have lower thermal stability. The activation energies (Ea) calculated by the Flynn Wall Ozawa (FWO) and Kissinger Akahira Sunose (KAS) model-free approaches and by model-fitting (Kissinger method and Coats-Redfern method) are in good agreement with one another. In addition, in this work, the degradation mechanism of biocomposites is proposed using Coats-Redfern and Criado methods.

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Section: Thermogravimetric Analysismentioning

confidence: 94%

Thermal degradation kinetics of Opuntia Ficus Indica flour and talc-filled poly (lactic acid) hybrid biocomposites by TGA analysis

Gharsallah

Layachi

Louaer

et al. 2021

Journal of Composite Materials

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“…The bimodal melting peak was attributed to two types of crystal structure [52,53] . The appearance of double melting peaks can be ascribed to the melt-recrystallization mechanism [54] , in which the perfect and larger size crystalline structure led to a relatively higher melting temperature [27] . In the presence of talc and Talc-g-pla, the melting peaks in the DSC curves of PLA composites (in Fig.…”

Section: Characterization Of Pla Compositesmentioning

confidence: 99%

“…epoxidized soybean oil (ESO) [27] , or ethylene butyl acrylate glycidyl methacrylate (GEBMA) [24] is usually added in the composite of talc and PLA. For example, over 10 wt% acetyl triethyl citrate was able to increase the crystallinity by 8% and the crystallization rate to obtain fully crystallized parts in an injection molding cycle [20] .…”

Section: Introductionmentioning

confidence: 99%

“…Barletta et al [30] grafted two organosilane molecules, APTES and (3glycidyloxypropyl)trimethoxysilane (GLYMO) onto the talc surface, which showed a stronger nucleating effect of commercial PLA because of the chemical and physical interactions between the functional groups on the surface of the pretreated talc and the terminal groups of the PLA chains. Hong et al [27] utilized the hydroxyl groups on the surface of talc to simultaneously react with the epoxide ring of ESO and the scission radical of PLA during the blending process in order to improve both the miscibility and mechanical properties. In the presence of 10 wt% talc, 10 wt% ESO, and 0.5 wt% initiator tert-butyl peroxybenzoate (TBPB), the elongation at break of PLA composites was increased by 74 times though the tensile strength decreased by 40%.…”

Section: Introductionmentioning

confidence: 99%

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Crystallization improvement of PLA by the talc with “grafting from” method of polymerization of lactide

Zhu,

Sun,

Meng

et al. 2024

J Polym Res

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The slow crystallization rate of polylactic acid (PLA) hampers its applications. By the "grafting from" method, a modi ed talcum powder (Talc-g-pla) was synthesized by the ring-opening polymerization (ROP) of lactide in bulk. The polymer chains grew in situ and chemically grafted on the talc surface, which was tightly connected even after washing with dichloromethane for 24 h. The Fourier transform infrared spectroscopy (FTIR), atomic force microscope (AFM), and the thermogravimetric analysis (TGA) of Talc-g-pla con rmed the successful modi cation of talc with PLA, which was about 2 wt%. Due to the good compatibility by the grafted PLA as a bridge between PLA and talc, the Talc-g-pla was well dispersed and served as an e cient nucleating agent of commercial PLA at low loadings. For the PLA/Talc-g-pla composite by the blend of Talc-g-pla with PLA in the proportions between 0.5-3.0 wt%, the differential scanning calorimeter (DSC) and polarized optical microscope (POM) showed that the improvement of thermodynamic properties and crystallization of PLA/Talc-g-pla composites were more obvious than those of the PLA/Talc physical composites. The DSC results suggested that the 1 wt% Talc-g-pla increased the crystallinity of PLA by over 3% than talc.

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“…Based on the comprehensive consideration, 2% EPR, 8% ESO, and 0.1% MA of bitumen by weight were recommended as an optimal proportion. Furthermore, given that the epoxide ring of ESO can react with hydroxyl under the catalysis of TPP, , Wei et al , prepared a catalytic-reactive rejuvenator consisting of ESO and TPP to repair degraded SBS modifiers and soften aged base bitumen. Specifically, the hydroxyl peak increased and a new ether peak caused by the reaction between opened epoxide groups of ESO and hydroxyl of SBS appeared in the FT-IR spectra, which can effectively reconstruct the network structure of SBS, as shown in Figure .…”

Section: Rejuvenation Of Aged Sbs Modified Bitumen By Repairing Degra...mentioning

confidence: 99%

Minireview on the Rejuvenation of Aged Styrene–Butadiene–Styrene (SBS) Modified Bitumen: State-of-the-Art and Outlook

et al. 2023

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Styrene−butadiene−styrene (SBS) modified bitumen are generally used as binders in bituminous pavement because of the good performance. Under the influence of traffic, environment, and other factors, SBS modified bitumen would be aged, which mainly includes the aging of base bitumen and the degradation of SBS modifiers. With the view of resource recycling, aged SBS modified bitumen is usually rejuvenated to prepare recycled bituminous mixtures. The present paper reviews the stateof-the-art research on the rejuvenation of aged SBS modified bitumen. In detail, the rejuvenation paths of aged SBS modified bitumen are comprehensively introduced and discussed. According to the rejuvenation mechanism, the current rejuvenation paths mainly consist of only rejuvenation of aged base bitumen in modified bitumen and rejuvenation of aged base bitumen and degraded modifiers. On this basis, characteristics and challenges of different rejuvenation paths are discussed, and the corresponding recommendations are further listed for future exploration.

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Effect of in situ reaction on thermal and mechanical properties of polylactide/talc composites

Cited by 12 publications

References 43 publications

Thermal degradation kinetics of Opuntia Ficus Indica flour and talc-filled poly (lactic acid) hybrid biocomposites by TGA analysis

Thermal degradation kinetics of Opuntia Ficus Indica flour and talc-filled poly (lactic acid) hybrid biocomposites by TGA analysis

Crystallization improvement of PLA by the talc with “grafting from” method of polymerization of lactide

Minireview on the Rejuvenation of Aged Styrene–Butadiene–Styrene (SBS) Modified Bitumen: State-of-the-Art and Outlook

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