Morphology and mechanical properties of polypropylene-POSS hybrid nanocomposites obtained by reactive blending

2013 ◽  
Vol 34 (6) ◽  
pp. 929-941 ◽  
Author(s):  
M. Grala ◽  
Z. Bartczak ◽  
M. Pracella
Keyword(s):  
Mechanical Properties ◽  
Hybrid Nanocomposites ◽  
Reactive Blending ◽  
Morphology And Mechanical Properties

MIXING SEQUENCE IN NATURAL RUBBER CONTAINING ORGANOCLAY AND NANO–CALCIUM CARBONATE TERNARY HYBRID NANOCOMPOSITES

2013 ◽  
Vol 86 (2) ◽  
pp. 330-341 ◽  
Author(s):  
Hedayatollah Sadeghi Ghari ◽  
Azam Jalali Arani ◽  
Zahra Shakouri
Keyword(s):  
Mechanical Properties ◽  
Calcium Carbonate ◽  
Natural Rubber ◽  
Research Field ◽  
Hybrid Nanocomposites ◽  
Melt Mixing ◽  
Filler Phase ◽  
Mixing Sequence ◽  
Single Filler ◽  
Morphology And Mechanical Properties

ABSTRACT Rubber nanocomposites containing one type of nanofiller are common and are widely established in the research field. In this study, natural rubber (NR) based ternary nanocomposites containing both calcium carbonate and organoclay have been characterized on the basis of morphology, cure characteristics, and physico-mechanical behavior. Natural rubber nanocomposite samples containing modified silicate (Cloisite 15A) and also nano-carbonate calcium were prepared using a laboratory internal mixer. The effect of the mixing sequence on the morphology and mechanical properties of the samples was investigated. Based on results of morphology and mechanical properties, the dual fillers phase nanocomposites (hybrid nanocomposite) perform better in comparison with single filler phase nanocomposites. The reinforcing capability of nano-CaCO3 and organoclay in NR was characterized by means of cure rheometry, morphology, and mechanical properties. NR/single filler phase and two filler phase nanocomposites were prepared by simple melt mixing method. Concentration of nano-CaCO3 and organoclay in NR was 10 and 5 parts per one hundred parts of rubber by weight, respectively. The microstructure and homogeneity of the compounds was confirmed by studying the dispersion of nanoparticles in NR via X-ray diffraction and field emission scanning electron microscopy. A more pronounced effect was achieved by using dual filler based nanocomposites as compared with single filler phase nanocomposites. The obtained results reveal that hybrid nanocomposites have more adequate morphology, rheometery, and mechanical behaviors as well as swelling resistance. The effect of mixing sequence of fillers has been studied in detail. Simultaneous addition of the two nanofillers to the NR compound would lead to better nanocomposite properties compared with other mixing sequences. Also, the results show that the mixing sequence of these nanofillers in NR has little effect on the performance of the nanocomposite.

scholarly journals Morphology and Mechanical Properties of NBR/PVC Hybrid Nanocomposites

2020 ◽  
Vol 9 (1) ◽  
pp. 2606-2611
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
High Surface ◽  
Tensile Modulus ◽  
Hybrid Nanocomposites ◽  
Cooh Group ◽  
Melt Mixing ◽  
Hybrid Filler ◽  
Compression Set ◽  
Morphology And Mechanical Properties

In this present work NBR/PVC conventional composite containing 70phr carbon black (CB) is taken for study. In order to reduce the utilization of CB, new hybrid nanocomposites containing varied content of both CB(40phr -55phr) and graphenenanoplatelets (GNP) (3phr-9phr) were developed by melt-mixing on a two roll mill and their morphology and mechanical properties were tested and compared with conventional composite. FESEM studies evident that the formation of exfoliated structures of GNP and formation of local CB-GNP hybrid filler network which ensures proper and compatible mixing in the composites. It is also found that mechanical properties such as tensile strength, elongation at break, swelling resistance, hardness and compression set increases with increase in GNP content from 3 to 6phr and whereas tensile modulus and tear strength increases with increase in GNP content from 3 to 9phr. Further the developed NBR/PVC hybrid nanocompositescontaining 55phr of CB and 3phr of GNP exhibited an improvement of 6.8%, 27.9% +1 shore A and 4.1% in tensile strength, tensile modulus, hardness, swelling resistance in comparison to the conventional composite containing 70phr CB. The better performance of NBR/PVC hybrid nanocomposites can be mainly attributed to high surface area of functionalized nanographene and its enhanced interactions with the NBR/PVC matrix, enhanced CB-GNP interactions, improved dispersion of graphene in the rubber blend due the presence of COOH group on the surface of graphene layers and formation of more cross-links between rubber and fillers with increase in nanofiller content . These newly developed hybrid nanocomposites can be used in automotive sector especially for oil seal applications where low compression set and high solvent resistance are of prime importance.

An investigation on the role of GMA grafting degree on the efficiency of PET/PP-g-GMA reactive blending: morphology and mechanical properties

2017 ◽  
Vol 74 (11) ◽  
pp. 4483-4497 ◽  
Author(s):  
Omid Moini Jazani ◽  
Hadi Rastin ◽  
Krzysztof Formela ◽  
Aleksander Hejna ◽  
Mohammad Shahbazi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Reactive Blending ◽  
Morphology And Mechanical Properties ◽  
Grafting Degree

Determination of mechanical properties of two-phase and hybrid nanocomposites: experimental determination and multiscale modeling

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Mahmoud Haghighi ◽  
Hossein Golestanian ◽  
Farshid Aghadavoudi
Keyword(s):  
Mechanical Properties ◽  
Ultimate Strength ◽  
Multiscale Modeling ◽  
Filler Content ◽  
Hybrid Nanocomposites ◽  
Dynamics Simulation ◽  
Strength Increase ◽  
Two Phase ◽  
Macro Scale ◽  
Elongation To Failure

Abstract In this paper, the effects of filler content and the use of hybrid nanofillers on agglomeration and nanocomposite mechanical properties such as elastic moduli, ultimate strength and elongation to failure are investigated experimentally. In addition, thermoset epoxy-based two-phase and hybrid nanocomposites are simulated using multiscale modeling techniques. First, molecular dynamics simulation is carried out at nanoscale considering the interphase. Next, finite element method and micromechanical modeling are used for micro and macro scale modeling of nanocomposites. Nanocomposite samples containing carbon nanotubes, graphene nanoplatelets, and hybrid nanofillers with different filler contents are prepared and are tested. Also, field emission scanning electron microscopy is used to take micrographs from samples’ fracture surfaces. The results indicate that in two-phase nanocomposites, elastic modulus and ultimate strength increase while nanocomposite elongation to failure decreases with reinforcement weight fraction. In addition, nanofiller agglomeration occurred at high nanofiller contents especially higher than 0.75 wt% in the two-phase nanocomposites. Nanofiller agglomeration was observed to be much lower in the hybrid nanocomposite samples. Therefore, using hybrid nanofillers delays/prevents agglomeration and improves mechanical properties of nanocomposite at the same total filler content.

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