Effect of core–shell acrylate rubber particles on the thermomechanical and physical properties of biocomposites from polylactic acid and olive solid waste

Khemakhem, Marwa; Lamnawar, Khalid; Maazouz, Abderrahim; Jaziri, Mohamed

doi:10.1002/pen.24642

Cited by 11 publications

(10 citation statements)

References 31 publications

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“…This is probably due to the hydrodynamic effects of the filler material introduced into the PLA matrix and mechanical constraints on the PLA matrix’s mobility and deformability [ 33 ]. Similar observations have been made elsewhere [ 34 , 35 ]. This also implies that the amphiphilic chitin-starch blend has a more significant effect on E′ below than above the glass transition temperature.…”

Section: Resultssupporting

confidence: 91%

Viscoelastic and Properties of Amphiphilic Chitin in Plasticised Polylactic Acid/Starch Biocomposite

et al. 2022

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The enhancement of the PLA thermomechanical properties is significant due to its suitability as a replacement for primary synthetic polymer use in diverse industrial production. The amphiphilic chitin was used as a compatibilizer in PLA/starch biocomposite. The properties of plasticised polylactic acid blended with starch, and amphiphilic chitin was studied for enhanced thermomechanical and viscoelastic properties. Chitin was modified using acetylated substitution reaction and blended with plasticised PLA/starch biocomposite. The biocomposite was prepared with combined compression and melt extrusion techniques. The biocomposite’s thermomechanical, thermal, mechanical, and morphological properties were studied using dynamic mechanical analysis, TGA-DSC, tensile test, and scanning electron microscopy. The storage and loss modulus were significantly enhanced with increased amphiphilic chitin content. Similarly, the single peak of tan delta showed good miscibility of the polymeric blend. Additionally, the modulus increases with frequency change from 1 Hz to 10 Hz. The thermal stability of the biocomposite was observed to be lower than the neat PLA. The tensile properties of the biocomposite increased significantly more than the neat PLA, with P4S4C having the highest tensile strength and modulus of 87 MPa and 7600 MPa. The SEM images show good miscibility with no significant void in the fractured surface. The viscoelastic properties of PLA were enhanced considerably with plasticizer and amphiphilic chitin with improved biodegradability. The properties of the biocomposite can be adapted for various industrial applications.

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Section: Resultssupporting

confidence: 91%

Viscoelastic and Properties of Amphiphilic Chitin in Plasticised Polylactic Acid/Starch Biocomposite

et al. 2022

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“…After extracting the olive oil, there remained a solid residue which was treated with hexane to recover the remaining oil and dried to evaporate water. The solid residue was then grinded into fine particles measured about 200 µm . The bulk density of OSW particles is 1.2.…”

Section: Methodsmentioning

confidence: 99%

Biocomposites based on polylactic acid and olive solid waste fillers: Effect of two compatibilization approaches on the physicochemical, rheological, and mechanical properties

et al. 2016

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A new valorization strategy for Olive Solid Waste (OSW) has been carried out consisting in incorporating this biomass as filler in a biopolymer matrix. In this study, biocomposites based on poly(D,L-lactide) (PLA) and OSW fillers were prepared with various filler contents. It was highlighted that the inclusion of OSW under high temperatures resulted in the degradation of the matrix leading to a reduction of the viscoelastic properties and molar masses. Nevertheless, it was shown that this degradation of PLA matrix could be attenuated through two approaches. The first was chemical and consisted in using a chain extender agent named Joncryl, containing glycidyl methacrylate (GMA) functions. The second route was physical and involved coating the OSW with the hydrophobic biopolymer poly (e-caprolactone) followed by mixing with PLA. Meanwhile, the effect of the OSW with and without Joncryl on the thermal stability, the melt and crystallization properties was assessed. Furthermore, the rheological properties of the controlled systems PLA/OSW/Joncryl and/or PLA/(OSW) coated with PCL were investigated in the molten state. The improvement of the shear viscoelastic properties corroborated the measured molar masses. The physicochemical matrix/filler interactions had to be taken into account to explain the improved rheological, morphological and tensile mechanical properties. POLYM. COMPOS., 00:000-000, 2016.

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“…[ 13–16 ] Using rubber particles to toughen PLLA has proved to be a simple and economical method. [ 17–20 ] But the serious problem of poor interfacial interaction between rubber and PLLA is ubiquitous in this method, which would lead to a rather low toughening efficiency. [ 21–23 ] Compared with the complex interfacial modification methods of reactive compatibilizing or synthesizing copolymer compatibilizers, in recent years, toughening PLLA with core‐shell rubber nanoparticles has attracted much more attention due to their good interfacial modification effect, low cost, and easy industrialized production.…”

Section: Introductionmentioning

confidence: 99%

Stereocomplex Crystallization Induced Significant Improvement in Transparency and Stiffness–Toughness Performance of Core‐Shell Rubber Nanoparticles Toughened Poly(l‐lactide) Blends

Liu

Bai

Ду

et al. 2021

Macro Materials & Eng

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Toughening modification of poly(l‐lactide) (PLLA) with rubber particles is often realized at the cost of transparency, mechanical strength, and modulus because high rubber loadings are generally required for toughening. In this work, a promising strategy to simultaneously improve the transparency and stiffness–toughness performance of poly(butyl acrylate)‐poly(methyl methacrylate) (BAMMA) core‐shell rubber nanoparticles toughened PLLA blends by utilizing the stereocomplex (SC) crystallization between PLLA and poly(d‐lactide) (PDLA) is devised. The results reveal that the construction of SC crystallites in PLLA matrix via melt‐mixing PLLA/BAMMA blends with PDLA can prevent BAMMA nanoparticles from aggregation and promote them to form network‐like structure at lower contents. As a result, not only higher toughening efficiency with less rubber contents but also superior transparency is achieved in the PLLA/PDLA/BAMMA blends as compared with the PLLA/BAMMA ones where large aggregated BAMMA clusters are formed. Moreover, the outstanding reinforcement of SC crystallites network for PLLA can impart an enhanced tensile strength and modulus to PLLA/PDLA/BAMMA blends, thus improving the stiffness–toughness performance of PLLA/PDLA/BAMMA blends to a higher degree. This work demonstrates that SC crystallization is a promising solution to solve the contradiction between transparency and mechanical properties and then obtain superior comprehensive performances in rubber toughened PLLA blends.

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Effect of core–shell acrylate rubber particles on the thermomechanical and physical properties of biocomposites from polylactic acid and olive solid waste

Cited by 11 publications

References 31 publications

Viscoelastic and Properties of Amphiphilic Chitin in Plasticised Polylactic Acid/Starch Biocomposite

Viscoelastic and Properties of Amphiphilic Chitin in Plasticised Polylactic Acid/Starch Biocomposite

Biocomposites based on polylactic acid and olive solid waste fillers: Effect of two compatibilization approaches on the physicochemical, rheological, and mechanical properties

Stereocomplex Crystallization Induced Significant Improvement in Transparency and Stiffness–Toughness Performance of Core‐Shell Rubber Nanoparticles Toughened Poly(l‐lactide) Blends

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