Investigation of the morphology of polypropylene − nanoclay nanocomposites

Hegde, Raghavendra R.; Spruiell, Joseph E.; Bhat, Gajanan

doi:10.1002/pi.4623

Cited by 7 publications

(6 citation statements)

References 32 publications

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“…The product was obtained as suspension. Since, clay facilitates crystallization of nylon , it is likely that nylon will tend to crystallize during and after polymerization before blending it with epoxy, as both process occurs simultaneously . Moreover, silicate layers present in clay can lead to a nucleation and growth of nylon crystals due to hydrogen bonds among nylon chains and silicates .…”

Section: Resultssupporting

confidence: 55%

“…This suggests that crystallinity of nylon‐6 is crucial in deciding the properties of resultant composite. Clay is known to have a significant effect on the crystalline properties of nylon‐6 . From viscosity results, it can be inferred that when nylon‐6 is modified with 0.5 wt% of clay, the crystallinity of nylon‐6 increases substantially while when it is modified with 1 wt% clay, the crystallinity reduces such that viscosity approaches the nylon‐6/epoxy sample without clay.…”

Section: Resultsmentioning

confidence: 99%

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Clay induced thermoplastic crystals in thermoset matrix: Thermal, Dynamic mechanical, and morphological analysis of clay/nylon‐6‐epoxy nanocomposites

Vyas

Iroh

2015

Polymer Composites

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A novel procedure to synthesize in situ clay/nylon-6 composite suspension was explored via anionic solution polymerization. The suspension was efficiently blended with water-based epoxy resin using mechanical stirrer at room temperature. Hence, a 3-component coating system was obtained consisting of nano-clay, nylon-6 and epoxy resin. Large number of coatings and films were prepared with variation in clay and nylon-6 loading. Concentration of clay was found to have profound effect on crystallinity of nylon-6, thereby affecting the overall properties of clay/nylon/epoxy composite. All the films were characterized for thermal and dynamic mechanical behavior using differential scanning calorimeter (DSC) and dynamic mechanical analysis (DMA). Lower amount of clay was found to increase the crystallinity of nylon-6 which in turn increased the plasticization of epoxy resin indicated by reduction in T g . A multiphase morphology with distinct amorphous and crystalline zones was observed under scanning electron microscopy (SEM). A remarkable symmetrical morphology with branched dendritic crystal structure was observed for few of the clay/nylon/ epoxy system. POLYM. COMPOS., 37:2206-2217, 2016

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Section: Resultssupporting

confidence: 55%

Section: Resultsmentioning

confidence: 99%

Clay induced thermoplastic crystals in thermoset matrix: Thermal, Dynamic mechanical, and morphological analysis of clay/nylon‐6‐epoxy nanocomposites

Vyas

Iroh

2015

Polymer Composites

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“…[19][20][21][22][23][24] Continual studies have showed the improvements in overall properties for final products of polymer reinforced nanoclay with lower contents 0.5 wt % compared to conventional composites with a large amount of micron size fillers such as wood particles, glass, and metals. 25 Some of the recent studies showed that polypropylene-nanoclay (PPNC) nanocomposites had gained a significant attention for their improvement on high modulus, strength, and heat resistance. The addition of nanoclay in PP and PP increases the melt flow viscosity and also enhances the improvements of the rate of crystallinity and thermal stability.…”

Section: -15mentioning

confidence: 99%

Investigation of improvement of thermal and mechanical properties of polypropylene / nano clay composites

Awad¹,

Khalaf²

2018

International Journal of Chemistry and Technology

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This work aims to study the characterizations and modifications of systems based on polypropylene (PP) and nanoclay (NC). In this context, the effects of thermal and mechanical properties of the compsites of nanoclays with different loading of 1, 3, and 6% incorporated in PP matrix were investigated. The influences of thermal and mechanical properties on the preparation of polypropylene/nanoclay (PPNC) composite were investigated. The results of the thermogravimetric analysis (TGA) showed that thermal stability increased with higher loadings of nanoclay. The tensile properties of PP and PPNC were also studied. The tensile strength of PP with the higher loading of nanoclay increased by 24.40% compared to that of the pure PP matrix (27.5MPa). The modulus of elasticity of PPNC with higher loading of 6% NC was higher by 17.32% than that of pure PP. The elongation at break of PPNC reduced by 53%, by comparing with pure PP. The Tg of PNCC with higher loading of NC were higher by 8.6%. The degree of crystallinity of PPNC was higher by 27% than pure PP.

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“…Mesoscopic dynamics models have received increasing attention, as mesoscopic properties form a bridge between microscopic and macroscopic properties [11][12][13][14]. Compared with atomistic simulation methods, mesoscopic dynamics models, such as MesoDyn [15][16][17] can increase the scale of the simulation by several orders of magnitude.…”

Section: Introductionmentioning

confidence: 99%

Changes in the phase morphology of miktoarm PS-b-PMMA copolymer induced by a monolayer surface

Wang

2015

Colloid Polym Sci

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It is known that polystyrene (PS) and poly(methyl methacrylate) (PMMA) blocks are immiscible at 383, 413, and 443 K and that their Flory-Huggins interaction parameters have the same blending ratio dependence at those temperatures. In this study, the phase morphologies of six groups of 12 miktoarm PS-b-PMMA copolymers were investigated at 383, 413, and 443 K via MesoDyn simulations. There is nearly no change for the same copolymer under different temperatures. We designed four series of patterned surfaces (18 total) and found that the inducing effect of these surfaces has some influence on the microscopic phase morphology of the polymers, including a reinforcing immiscible effect and a weakening immiscible effect. The degree of phase separation depended on the molecular architecture of the block copolymers, temperature, and the characteristics of the inducing surfaces. Higher temperature and higher PS-rich component copolymers exhibited higher order parameters. The co-4432 and co-8832 surfaces exhibited the most intensive inducing effect because of their 16 and 32 independent micro-environments, respectively. A set of comparative simulations was carried out with a high interaction energy between the polymeric species. The results confirmed the possibility of forming a hexagonal columnar phase with a core shell composed of the designed molecular structures as well as demonstrated the potential application of micro-environments in producing special mesoscopic structures.

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Investigation of the morphology of polypropylene − nanoclay nanocomposites

Cited by 7 publications

References 32 publications

Clay induced thermoplastic crystals in thermoset matrix: Thermal, Dynamic mechanical, and morphological analysis of clay/nylon‐6‐epoxy nanocomposites

Clay induced thermoplastic crystals in thermoset matrix: Thermal, Dynamic mechanical, and morphological analysis of clay/nylon‐6‐epoxy nanocomposites

Investigation of improvement of thermal and mechanical properties of polypropylene / nano clay composites

Changes in the phase morphology of miktoarm PS-b-PMMA copolymer induced by a monolayer surface

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