The influence of alkyl substituents of POSS in polyethylene nanocomposites

Perrin, F.X.; Panaitescu, Denis Mihaela; Frone, Adriana Nicoleta; Radovici, Constantin; Nicolae, Cristian‐Andi

doi:10.1016/j.polymer.2013.02.035

Cited by 36 publications

(35 citation statements)

References 20 publications

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“…It should be noted that Frone et al [26,27] showed that octakis(dimethylsiloxy)octasilsesquioxanes bearing branched alkyl substituents such as 3,3-dimethylpropyl, 3,3-dimethyl-butyl and 3,3-dimethyl-pentyl may slightly enhance the crystallization behavior of LDPE/ POSS nanocomposites.…”

Section: Resultsmentioning

confidence: 99%

“…The incorporation of the thermally robust POSS moiety significantly affects the polyolefin thermal properties, contributing toward greater thermal stability of the polymer matrix [20,23,24,26,27,30,43,45]. This influence is visible, especially in the case of thermo-oxidative behavior of polymer.…”

Section: Thermal Stability Studiesmentioning

confidence: 99%

“…Thermo-oxidative degradation of POSS leads to the formation of a silica-like residue [26,27]. POSS nanofillers tend to accumulate on the material surface during heating, and they form a ceramic layer that acts as a protective barrier which significantly reduces flow of heat and gas into nanocomposite material [20,24,48].…”

Section: Thermal Stability Studiesmentioning

confidence: 99%

“…POSS nanofillers tend to accumulate on the material surface during heating, and they form a ceramic layer that acts as a protective barrier which significantly reduces flow of heat and gas into nanocomposite material [20,24,48]. Thus, the significant increase in thermal stability of POSS-containing polyolefin nanocomposites is observed especially in terms of higher mass loss temperatures [20,24,26,27,30,42,43,45,48]. However, it should be emphasized that the extent of improvement in thermal stability for such composites depends on the type of the polymer matrix and on the structure and content of the POSS filler.…”

Section: Thermal Stability Studiesmentioning

confidence: 99%

“…However, it should be mentioned that the papers published to date covered mainly the properties of polyolefin/POSS nanocomposites which contained POSS molecules with relatively short alkyl chain substituents (from methyl to iso-octyl) [20][21][22][25][26][27][28][29][30]. Only few papers related to nanocomposites with long alkyl chain substituents (from n-octyl to n-octadecyl) on the T 8 POSS core [31,32] and most of those studies focused on PP/POSS [20-22, 25, 28-30] and LDPE/POSS [26,27,31,32] nanocomposites, while studies on HDPE/POSS nanocomposites were limited [33].…”

Section: Introductionmentioning

confidence: 99%

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Study of thermal properties of polyethylene and polypropylene nanocomposites with long alkyl chain-substituted POSS fillers

Niemczyk

Dziubek

Sacher-Majewska

et al. 2016

J Therm Anal Calorim

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The effect of incorporation of octakis({alkyl} dimethylsiloxy)octasilsesquioxanes molecules with n-octyl, n-octadecyl and 4-methyl-hexyl substituents on thermal properties of polypropylene (PP), low-density polyethylene (LDPE) and high-density polyethylene (HDPE) was investigated. Thermal properties of those composite materials were evaluated by means of the differential scanning calorimetry (DSC) and thermogravimetric analysis (TG) methods. The type and mass% content of POSS nanofillers influenced the crystallization and melting properties as well as thermal stability of the obtained polyolefin nanocomposites. The incorporated POSS particles-acting as nucleating agents-improved the crystallization process of those polyolefin materials. The POSS nanofiller with n-octyl substituents turned out the most effective nucleating agent. The addition of POSS nanofiller particles into the polyolefin matrix affected the melting behavior of the nanocomposites obtained, decreasing their melting temperatures. Thermal stability under nitrogen as well as in air atmosphere was most significantly enhanced for polyolefin nanocomposites contained the POSS with n-octadecyl substituents. That may result from improved compatibility of the POSS structure with long n-alkyl chain substituents at the silicon-oxygen core. The uniform dispersion of the long n-alkyl chainsubstituted POSS was confirmed by SEM analysis.

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Section: Resultsmentioning

confidence: 99%

Section: Thermal Stability Studiesmentioning

confidence: 99%

Section: Thermal Stability Studiesmentioning

confidence: 99%

Section: Thermal Stability Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Study of thermal properties of polyethylene and polypropylene nanocomposites with long alkyl chain-substituted POSS fillers

Niemczyk

Dziubek

Sacher-Majewska

et al. 2016

J Therm Anal Calorim

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Study of polyethylene nanocomposites with polyhedral oligomeric silsesquioxane nanofillers—from structural characteristics to mechanical properties and processability

et al. 2017

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Study and evaluation of dispersion of polyhedral oligomeric silsesquioxane and silica filler in polypropylene composites

et al. 2018

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Various methods were used for evaluation of homogeneity of polypropylene (PP) matrix composites with octakis([n‐octyl]dimethylsiloxy)octasilsesquioxane, octakis([n‐octadecyl]dimethylsiloxy)octasilsesquioxane, and silica (SiO2) fillers. The filler dispersion was determined on the basis of the results from the wide‐angle X‐ray scattering (WAXS) analysis, from the tests of selected mechanical properties, from scanning electron microscopy (SEM) with energy dispersive X‐ray spectroscopy and from the decomposable entropic descriptor method. The use of different methods allowed to evaluate homogeneity of PP composites on various levels and with different precisions. The dispersion degree was found to be mostly depended on the kind and amount of the filler used. The presence of long n‐alkyl chain substituents in POSS molecules greatly improved the level of filler dispersion in the polymer matrix in comparison to silica which was visually assessed by SEM. The WAXS method revealed the formation of filler aggregates in the PP matrix which influenced the structural characteristic of PP composites and changed the mechanical properties of those materials. However, the decomposable entropic descriptor method provided the possibility of quantitative and the most objective estimation of homogeneity of the obtained composite materials. POLYM. COMPOS., 40:1354–1364, 2019. © 2018 Society of Plastics Engineers

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The influence of alkyl substituents of POSS in polyethylene nanocomposites

Cited by 36 publications

References 20 publications

Study of thermal properties of polyethylene and polypropylene nanocomposites with long alkyl chain-substituted POSS fillers

Study of thermal properties of polyethylene and polypropylene nanocomposites with long alkyl chain-substituted POSS fillers

Study of polyethylene nanocomposites with polyhedral oligomeric silsesquioxane nanofillers—from structural characteristics to mechanical properties and processability

Study and evaluation of dispersion of polyhedral oligomeric silsesquioxane and silica filler in polypropylene composites

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