Synergistic effect of organically modified layered double hydroxide on thermal and flame-retardant properties of poly(butyl acrylate–vinyl acetate)

Zhao, Chunxia; Peng, Gang; Liu, Bailing; Jiang, Zhengwu

doi:10.1007/s10965-011-9604-8

Cited by 29 publications

(13 citation statements)

References 40 publications

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“…The initial decomposition temperature ( T initial ) is referred to the temperature at which the weight loss is 5 wt % . The temperature of the maximum mass loss rate is labeled as T max …”

Section: Resultsmentioning

confidence: 99%

Flame retardant and mechanical properties of epoxy composites containing APP−PSt core−shell microspheres

Zhao

Xing

et al. 2013

J of Applied Polymer Sci

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Ammonium polyphosphate (APP)-polystyrene (PSt) core-shell microspheres (CSPs) were synthesized via in situ radical polymerization. The core-shell structure was confirmed by transmission electron microscope (TEM). The results of optical contact angle measurements demonstrated a significant improvement in hydrophobicity of the modified APP. The obtained APP-PSt CSPs were added into epoxy (EP) system with various loadings. Effects of CSP on flame retardancy, thermal properties, heat release rate (HRR), smoke production, and mechanical properties of EP/CSP composites were investigated by limiting oxygen index (LOI), UL-94 tests, thermogravimetric analysis (TGA), cone calorimeter, and tensile test. LOI and UL-94 indicated that CSP remarkably improved the flame retardancy of EP composites. TGA showed that the initial decomposition temperature and the maximum-rate decomposition temperature decreased, whereas residue yields at high temperature increased with the incorporation of microspheres. Cone calorimetry gave evidence that HRR, peak release rate, average HRR, and smoke production rate of EP/CSP composites decreased significantly. The morphology of char residues suggested that CSP could effectively promote EP to form high-quality char layer with compact outer surface and swollen inner structure. Tensile strength of EP was enhanced with the addition of CSP. V C 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40218.

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“…The initial decomposition temperature ( T initial ) is referred to the temperature at which the weight loss is 5 wt % . The temperature of the maximum mass loss rate is labeled as T max …”

Section: Resultsmentioning

confidence: 99%

Flame retardant and mechanical properties of epoxy composites containing APP−PSt core−shell microspheres

Zhao

Xing

et al. 2013

J of Applied Polymer Sci

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“…In such a method, films display well‐dispersed LDH platelets in the polymer matrix, leading to transparent composites even for high loadings (up to 50 wt%). Organically modified LDH with DDS were also incorporated into poly ( n ‐butyl acrylate‐ co ‐vinyl acetate) latexes by emulsion polymerization using potassium peroxodisulfate (KPS) as an initiator and PVA as a stabilizer . Interestingly, the cointercalation of DDS and various monomeric anions like (meth)acrylates, 4‐vinyl benzoate and 2‐acrylamido‐2‐methyl‐1‐propanesulfonate into LDH promoted LDH exfoliation by the in situ formation of polymer chains during the in situ emulsion polymerization of poly(butyl methacrylate) .…”

Section: Hybrid Ldh Nanocompositesmentioning

confidence: 99%

Tailoring Hybrid Layered Double Hydroxides for the Development of Innovative Applications

Taviot-Guého

Prévot

Forano

et al. 2017

Adv Funct Materials

240

142

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International audienceHybrid materials based on layered double hydroxides (LDHs) exhibit great potential in diverse fields such as health care, polymer composites, environment, catalysis, and energy generation. Indeed, the compositional flexibility and the scalability of LDH structures, their low cost, and their ease of synthesis have made hybrid LDHs extremely attractive for constructing smart and high-performance multifunctional materials. This review provides a comprehensive and critical overview of the current research on multifunctional hybrid LDHs. Organic–inorganic hybrid LDHs, intercalated and surface-immobilized structures, are both specifically addressed. The new trends and strategies for hybrid LDH synthesis are first described, and then the potential of the latest hybrid LDHs, polymer LDH nanocomposites, and LDH bio-nanocomposites are presented. Significant achievements published from ≈2010, including authors' results, which employ hybrid LDH assemblies in materials science, medicine, polymer nanocomposites, cement chemistry, and environmental technologies, are specifically addressed. It is concluded with remarks on present challenges and future prospects

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“…Among these, ammonium polyphosphate (APP) shows excellent flame retardant performance because of its lower loadings and cost, as well as good processability [2]. In addition, APP is halogen free, so it will not generate harmful gases during its use, which makes environmentally friendly compared with halogen-containing additives [19]. Some researchers have investigated the synergistic effect between LDH and APP; all composites can reach a UL-94 V-0 rating when incorporating APP in polymer/LDH systems [20,21,22,23].…”

Section: Introductionmentioning

confidence: 99%

Ammonium Polyphosphate Intercalated Layered Double Hydroxide and Zinc Borate as Highly Efficient Flame Retardant Nanofillers for Polypropylene

2018

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We found in our previous study that layered double hydroxides (LDHs) which undergo aqueous miscible organic solvent treatment (AMOST) can tune the hydrophobicity surface of LDHs to be hydrophobic, and then the solvent mixing method can be used to prepare polymer/LDH nanocomposites. However, flame retardant property is not very high if LDHs are only used. In this present work, ammonium polyphosphate (APP) intercalated LDHs and zinc borate (ZB) was incorporated into a polypropylene (PP) matrix using the solvent mixing method. The structures, morphologies, and performance of the composites were characterized carefully. The peak heat release rate (PHRR) reduction of PP containing 10 and 20 wt % APP-LDH reached 27% and 55%, respectively, which increased up to 63% compared with PP/CO3-LDH. After incorporating 2 wt % ZB in the PP/APP-LDH system, the flame retardant property was further improved. Polypropylene composites with 20 wt % APP-LDH and 2 wt % ZB showed a 58% PHRR reduction. In addition, thermogravimetric analyzer (TGA) results indicated that the addition of APP-LDH and ZB improved the temperature at 50% weight loss (T50%) and the char formation of the materials significantly.

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Synergistic effect of organically modified layered double hydroxide on thermal and flame-retardant properties of poly(butyl acrylate–vinyl acetate)

Cited by 29 publications

References 40 publications

Flame retardant and mechanical properties of epoxy composites containing APP−PSt core−shell microspheres

Flame retardant and mechanical properties of epoxy composites containing APP−PSt core−shell microspheres

Tailoring Hybrid Layered Double Hydroxides for the Development of Innovative Applications

Ammonium Polyphosphate Intercalated Layered Double Hydroxide and Zinc Borate as Highly Efficient Flame Retardant Nanofillers for Polypropylene

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