Low density polycarbonate–graphene nanocomposite foams produced by supercritical carbon dioxide two-step foaming. Thermal stability

Gedler, Gabriel; Antunes, Marcelo; Velasco, José Ignácio

doi:10.1016/j.compositesb.2016.02.025

Cited by 18 publications

(8 citation statements)

References 25 publications

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“…[1][2][3][4][5][6] As an important general engineering plastic, polycarbonate (PC) has also achieved great development in many manufacturing industries, including building material, automobile, electrical and electronic, and medicine industries. [7][8][9][10] Especially for bisphenol-A type PC, its inherent ame retardancy makes most untreated bisphenol-A type PC meet the standard of the UL94 V-2 level. 11 However, the need for higherlevel ame retardant PC materials is always the bottom-line standard of application.…”

Section: Introductionmentioning

confidence: 99%

Gaseous-phase flame retardant behavior of a multi-phosphaphenanthrene compound in a polycarbonate composite

et al. 2017

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A multi-phosphaphenanthrene compound (TDBA) was incorporated into polycarbonate (PC) to prepare a flame retardant composite. TDBA improved the flame retardancy of the PC material effectively. The PC composite comprising 10 wt% TDBA passed the UL94 V-0 level with a LOI value of 33.7%. The incorporation of TDBA effectively inhibited the combustion intensity of the TDBA/PC composite via reducing the production of flammable methane and carbonyl-containing substances, suppressing the oxidative process of combustible pyrolysis products, and promoting the PC matrix to form large-scale smoke particles. All these were caused by releasing phosphaphenanthrene fragments, PO, and phenoxyl free radicals from pyrolyzed TDBA. As an additive-type flame retardant with multiple phosphaphenanthrene groups, TDBA was verified to exert its effect mainly in the gaseous phase during flame retarding of PC materials.

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Section: Introductionmentioning

confidence: 99%

Gaseous-phase flame retardant behavior of a multi-phosphaphenanthrene compound in a polycarbonate composite

et al. 2017

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“…Usually, the thermal stability of foam materials is affected by nanofillers and the cell structure, which mostly affects the onset degradation temperature of the material [34]. The voids in the foamed material act as thermal insulators, restraining heat transfer, and thus increase the T onset [35,36]. In the current case, an increase in T onset of nanocomposite foams is associated with CN particles, which acted as heat barriers by inhibiting overall heat transfer, which delayed the onset degradation.…”

Section: Crystalline Structurementioning

confidence: 82%

Morphological, thermal, and thermomechanical properties of cellulose nanocrystals reinforced polylactide/poly [(butylene succinate)-co-adipate] blend composite foams

Motloung

Zungu

Ojijo

et al. 2020

Functional Composite Mater

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This study examines the influence of cellulose nanocrystal (CN) particles on the morphological, thermal, and thermo-mechanical properties of polylactide (PLA)/poly [(butylene succinate)-co-adipate] (PBSA) blend foams prepared by casting and particulate leaching method using fructose as porogen particles. The morphological analysis showed an interconnected open-cell structure, with porosity above 80%. The crystallinity of the prepared foams was disrupted by the inclusion of CN particles as observed from XRD analyses, which showed a decrease in PLA crystal peak intensity. With regards to neat blend foam, the onset thermal degradation increased with the addition of CN particles, which also increased the thermal stability at 50% weight loss. Furthermore, CN acted as a reinforcing agent in improving the stiffness of the prepared blend foam. Overall, completely environmentally friendly foams were successfully prepared, as a potential material that can replace the current existing foam materials that pose many environmental concerns. However, there is a need to develop an environmentally friendly processing technique.

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“…Other studies have indicated the much higher increase of the thermal stability, particularly T d-onset , of the foamed nanocomposite materials than that of the unfoamed nanocomposite material. The improvements in this regard are attributed to the cellular structure, which acts as a heat insulator during burning and inhibits heat transfer at the onset resulting in a delay of the degradation process and an improvement of thermal stability [128,129,130]. Borkotoky et al [97] observed single-step degradation of PLA-reinforced CNC foams.…”

Section: Properties Of Cellulose-nanostructured Nanocomposite Foamsmentioning

confidence: 99%

Cellulose Nanostructure-Based Biodegradable Nanocomposite Foams: A Brief Overview on the Recent Advancements and Perspectives

et al. 2019

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The interest in designing new environmentally friendly materials has led to the development of biodegradable foams as a potential substitute to most currently used fossil fuel–derived polymer foams. Despite the possibility of developing biodegradable and environmentally friendly polymer foams, the challenge of foaming biopolymers still persists as they have very low melt strength and viscosity as well as low crystallisation kinetics. Studies have shown that the incorporation of cellulose nanostructure (CN) particles into biopolymers can enhance the foamability of these materials. In addition, the final properties and performance of the foamed products can be improved with the addition of these nanoparticles. They not only aid in foamability but also act as nucleating agents by controlling the morphological properties of the foamed material. Here, we provide a critical and accessible overview of the influence of CN particles on the properties of biodegradable foams; in particular, their rheological, thermal, mechanical, and flammability and thermal insulating properties and biodegradability.

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Low density polycarbonate–graphene nanocomposite foams produced by supercritical carbon dioxide two-step foaming. Thermal stability

Cited by 18 publications

References 25 publications

Gaseous-phase flame retardant behavior of a multi-phosphaphenanthrene compound in a polycarbonate composite

Gaseous-phase flame retardant behavior of a multi-phosphaphenanthrene compound in a polycarbonate composite

Morphological, thermal, and thermomechanical properties of cellulose nanocrystals reinforced polylactide/poly [(butylene succinate)-co-adipate] blend composite foams

Cellulose Nanostructure-Based Biodegradable Nanocomposite Foams: A Brief Overview on the Recent Advancements and Perspectives

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