Thermal Behavior and Degradation Kinetics of Compatibilized Metallocene-Linear Low Density Polyethylene/Nanoclay Nanocomposites

Kaptan, Navid; Jafari, Seyed Hassan; Mazinani, Saeedeh; Akhlaghi, Shahin; Fazilat, Hakimeh; Gedde, Ulf W.; Hedenqvist, Mikael S.; Naderi, Ali; Monfared, Alireza

doi:10.1080/03602559.2014.886055

Cited by 2 publications

(1 citation statement)

References 33 publications

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“…e most commonly used compatibilizers are obtained by grafting polar groups on polymers and copolymers. Examples of these compatibilizers include maleic anhydride grafted on polyethylene (PE-g-MA) [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27], on linear low density polyethylene (LLDPE-g-MA) [28][29][30], on polypropylene (PPg-MA) [8,10,19,, and on styrene/ethylene-butylene/ styrene (SEBS-g-MA) [51,56,57]. Other polar groups grafted on polymers are itaconic acid [58][59][60], glycidyl methacrylate (GMA) [54], and acrylic acid (AA) [54,61,62].…”

Section: Introductionmentioning

confidence: 99%

Compatibilizer Polarity Parameters as Tools for Predicting Organoclay Dispersion in Polyolefin Nanocomposites

Weltrowski

Dolez

2019

Journal of Nanotechnology

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Nanocomposites give an innovative method to increase the mechanical, thermal, and barrier performance of polymers. However, properly dispersing the nanoparticles in the polymer matrix is often key in achieving high performance, especially in the case of hydrophilic nanoparticles and hydrophobic polymers. For that purpose, nanoparticles may be functionalized with organic groups to increase their affinity with the polymer matrix. Compatibilizing agents may also be included in the nanocomposite formulation. This paper aims at identifying parameters relative to the compatibilizer polarity that would allow predicting nanoparticle dispersion in the polymer nanocomposite. The analysis used published data on nanocomposite samples combining clay nanoparticles, polyolefins, and various compatibilizing agents. We studied the correlations between the nanoclay exfoliation ratio and five different parameters describing the compatibilizer hydrophilic-lipophilic balance: the acid value, the mole, and weight fraction of polar groups, the number of polymer chain units per polar group, and the number of moles of polar groups per mole of compatibilizer. The best correlation was observed with the number of polymer chain units per polar group in the compatibilizer. This parameter could be used as a tool to predict the dispersion of organoclay nanoparticles in polyolefins. Another important result of the study is that, among the compatibilizers investigated, those with a low acid value provided a better nanoclay exfoliation compared to those with a high acid value. This may indicate the existence of a maximum in the nanoclay exfoliation/compatibilizer polarity curve, which would open new perspectives for nanocomposite performance optimization.

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Section: Introductionmentioning

confidence: 99%

Compatibilizer Polarity Parameters as Tools for Predicting Organoclay Dispersion in Polyolefin Nanocomposites

Weltrowski

Dolez

2019

Journal of Nanotechnology

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Non-isothermal crystallization and thermal degradation kinetics of MXene/linear low-density polyethylene nanocomposites

Cao

Zhou

et al. 2017

E-Polymers

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A novel two-dimensional material MXene was used to synthesize nanocomposites with linear low-density polyethylene (LLDPE). The influence of MXene on crystallization and thermal degradation kinetics of LLDPE was investigated. Non-isothermal crystallization kinetics was investigated by using differential scanning calorimetry (DSC). The experimental data was analyzed by Jeziorny theory and the Mo method. It is found that MXene acted as a nucleating agent during the non-isothermal crystallization process, and 2 wt% MXene incorporated in the nanocomposites could accelerate the crystallization rate. Findings from activation energy calculation for non-isothermal crystallization came to the same conclusion. Thermal gravity (TG) analysis of MXene/LLDPE nanocomposites was conducted at different heating rates, and the TG thermograms suggested the nanocomposites showed an improvement in thermal stability. Apparent activation energy (Ea) of thermal degradation was calculated by the Kissinger method, and Ea values of nanocomposites were higher than that of pure LLDPE. The existence of MXene seems to lead to better thermal stability in composites.

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Thermal Behavior and Degradation Kinetics of Compatibilized Metallocene-Linear Low Density Polyethylene/Nanoclay Nanocomposites

Cited by 2 publications

References 33 publications

Compatibilizer Polarity Parameters as Tools for Predicting Organoclay Dispersion in Polyolefin Nanocomposites

Compatibilizer Polarity Parameters as Tools for Predicting Organoclay Dispersion in Polyolefin Nanocomposites

Non-isothermal crystallization and thermal degradation kinetics of MXene/linear low-density polyethylene nanocomposites

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