Toughened poly(methyl methacrylate) nanocomposites by incorporating polyhedral oligomeric silsesquioxanes

Kopesky, Edward T.; McKinley, Gareth H.; Cohen, Robert E.

doi:10.1016/j.polymer.2005.10.143

Cited by 167 publications

(119 citation statements)

References 17 publications

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“…While these descriptions are not based on a detailed analysis of the particle shapes, the precise form of these particles (at least for HA particles [25]) is expected to depend on the precipitation temperature, which ranges from ambient [58,59] to 40 °C [29,50,51,60]. More importantly, both particle types provide a unique perspective to study the effects of non-uniform cylindrical profiles of a nanoparticle-reinforced composite and its mechanical properties [30].…”

Section: Study Findingsmentioning

confidence: 99%

A Comparative Analysis of the Reinforcing Efficiency of Silsesquioxane Nanoparticles versus Apatite Nanoparticles in Chitosan Biocomposite Fibres

Wang

Pasbakhsh²,

Silva

et al. 2017

J. Compos. Sci.

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A comparative analysis of the effects of polyhedral oligomeric silsesquioxane (POSS) and hydroxyapatite (HA) for reinforcing chitosan (CS) is given here. Wet-spun CS nanocomposite fibres, blended with HA or POSS nanoparticles, at varying concentrations ranging from 1 to 9% (w/w) were stretched until rupture to determine the mechanical properties related to the elasticity (yield strength and strain, stiffness, resilience energy) and fracture (fracture strength strain and toughness) of the composite. Two-factor analysis of variance of the data concluded that only the fracture-related properties were sensitive to interaction effects between the particle type and concentration. When particle type is considered, the stiffness and yield strength of CS/POSS fibres are higher than CS/HA fibres-the converse holds for yield strain, extensibility and fracture toughness. With regards to sensitivity to particle concentration, stiffness and yield strength reveal trending increase to a peak value (the optimal particle concentration associated with the critical aggregation) and trending decrease thereafter, with increasing particle concentration. Although fracture strength, strain at fracture and fracture toughness are also sensitive to particle concentration, no apparent trending increase/decrease is sustained over the particle concentration range investigated here. This simple study provides further understanding into the mechanics of particle-reinforced composites-the insights derived here concerning the optimized mechanical properties of chitosan composite fibre may be further developed to permit us to tune the mechanical properties to suit the biomedical engineering application.

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Section: Study Findingsmentioning

confidence: 99%

A Comparative Analysis of the Reinforcing Efficiency of Silsesquioxane Nanoparticles versus Apatite Nanoparticles in Chitosan Biocomposite Fibres

Wang

Pasbakhsh²,

Silva

et al. 2017

J. Compos. Sci.

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“…This Figure shows that the cross-sectional area of the fibers was circular and the failure was initiated at the edge of the fiber. Since the size of rod Si 3 N 4 and SiC particles are very small, ranging from 20 to 30 nm in diameter, the pores within the structure could be an indication of nanoparticles integrated within the Nylon-6 composite fiber matrix which detached during fracture, described as particle matrix de-bonding during deformation [39]. The even distribution of pores throughout the cross-section could imply that the nanoparticles domains were evenly distributed through the fracture surface.…”

Section: Tensile Responsementioning

confidence: 99%

Influence of SiC/Si₃N₄ Hybrid Nanoparticles on Polymer Tensile Properties

Rangari

Yousuf

Jeelani

2013

Journal of Composites

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Nanostructured silicon carbide (SiC)/silicon nitride (Si 3 N 4 ) hybrid nanoparticles exhibit a high-potential for reinforcement of polymers. In the present investigation, silicon carbide ( -SiC) nanoparticles (∼30 nm) were sonochemically coated on acicular silicon nitride (∼100 nm × 800 nm) particles to increase the thermal and mechanical properties of Nylon-6 nanocomposite fibers. To produce Nylon-6/(SiC/Si 3 N 4 ) nanocomposite fibers, we have followed a two-step process. In the first step, SiC nanoparticles were coated on Si 3 N 4 nanorods using a sonochemical method and Cetyltrimethylammonium Bromide surfactant. In the second step, the SiC coated Si 3 N 4 hybrid nanoparticles were blended with Nylon-6 polymer and extruded in the form of nanocomposite polymer fibers. The nanocomposite fibers were uniformly stretched and stabilized using a two-set Godet roll machine. The diameters of the extruded neat Nylon-6 and SiC/Si 3 N 4 /Nylon-6 nanocomposite fibers were measured using a scanning electron microscope and then tested for their tensile and thermal properties. These results were compared with the neat Nylon-6 polymer fibers. These results clearly indicate that the as-prepared nanocomposite polymer fibers are much higher in tensile strength (242%) and Young's modulus (716%) as compared to the neat polymer fibers.

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“…POSS molecules can be easily incorporated into polymer systems through blending, grafting or copolymerization [15,16]. For example, several polymers, such as HDPE [21], PP [22], epoxy [23][24][25][26], PMMA [27][28][29][30], PU [31,32], PET [33][34][35] and PC [36], have been blended with POSS. It has been reported that PLLA/POSS nanocomposites have enhanced crystallization rate, improved mechanical properties and accelerated hydrolytic degradation as compared with pristine PLLA [19].…”

Section: Introductionmentioning

confidence: 99%

Poly(L-lactide) nanocomposites containing octaglycidylether polyhedral oligomeric silsesquioxane: Preparation, structure and properties

Zou¹,

Chen²,

Jiang³

et al. 2011

Express Polym. Lett.

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Abstract. Poly(L-lactide)s (PLLA) tethered with octaglycidylether polyhedral oligomeric silsesquioxane (OPOSS) with contents of 0.02-1.00 mol% were successfully prepared by solution ring-opening polymerization of L-lactide in the presence of Sn(Oct) 2 catalyst. Fourier transform infrared (FTIR) and proton nuclear magnetic resonance 1 H-NMR spectroscopic techniques confirm the formation of secondary hydroxyls due to the reaction between PLLA main chains and OPOSS cages. X-ray analyses prove that the presence of OPOSS does not alter the packing structure of PLLA chain in the crystals but enhances the crystallinity of PLLA hybrids. PLLA/PLLA-OPOSS nanocomposites with PLLA-OPOSS contents of 1-30 wt% were prepared by solution-mixing of the neat PLLA polymer with various contents of the PLLA-OPOSS hybrid with 0.50 mol% OPOSS. It is found that the glass transition temperature of the PLLA/PLLA-OPOSS nanocomposites remains the same as that of pristine PLLA and the thermooxidative stability of the nanocomposites is improved with the PLLA-OPOSS content of 1-20 wt%, as compared to that of the neat PLLA polymer. PLLA/PLLA-OPOSS nanocomposites, except for PLLA/PLLA-OPOSS 1 , has higher crystallization rate at 120°C. The nucleation density increases with increase in the content of PLLA-OPOSS.

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Toughened poly(methyl methacrylate) nanocomposites by incorporating polyhedral oligomeric silsesquioxanes

Cited by 167 publications

References 17 publications

A Comparative Analysis of the Reinforcing Efficiency of Silsesquioxane Nanoparticles versus Apatite Nanoparticles in Chitosan Biocomposite Fibres

A Comparative Analysis of the Reinforcing Efficiency of Silsesquioxane Nanoparticles versus Apatite Nanoparticles in Chitosan Biocomposite Fibres

Influence of SiC/Si₃N₄ Hybrid Nanoparticles on Polymer Tensile Properties

Poly(L-lactide) nanocomposites containing octaglycidylether polyhedral oligomeric silsesquioxane: Preparation, structure and properties

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Toughened poly(methyl methacrylate) nanocomposites by incorporating polyhedral oligomeric silsesquioxanes

Cited by 167 publications

References 17 publications

A Comparative Analysis of the Reinforcing Efficiency of Silsesquioxane Nanoparticles versus Apatite Nanoparticles in Chitosan Biocomposite Fibres

A Comparative Analysis of the Reinforcing Efficiency of Silsesquioxane Nanoparticles versus Apatite Nanoparticles in Chitosan Biocomposite Fibres

Influence of SiC/Si3N4 Hybrid Nanoparticles on Polymer Tensile Properties

Poly(L-lactide) nanocomposites containing octaglycidylether polyhedral oligomeric silsesquioxane: Preparation, structure and properties

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Influence of SiC/Si₃N₄ Hybrid Nanoparticles on Polymer Tensile Properties