scholarly journals Mechanical and thermal properties enhancement of polycarbonate nanocomposites prepared by melt compounding

2012 ◽  
Vol 128 (1) ◽  
pp. 924-924
Author(s):  
Sanjay K. Nayak ◽  
Smita Mohanty ◽  
Sushanta K. Samal
Keyword(s):  
Thermal Properties ◽  
Mechanical And Thermal Properties ◽  
Melt Compounding

Structure and Properties of Recycled Aromatic Thermoplastic Polyester Nanocomposites

2012 ◽  
Vol 527 ◽  
pp. 44-49
Author(s):  
Remo Merijs Meri ◽  
Janis Zicans ◽  
Tatjana Ivanova ◽  
Rita Berzina ◽  
Guntis Japins ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Mechanical And Thermal Properties ◽  
Structure And Properties ◽  
Screw Extruder ◽  
Melt Compounding ◽  
Weight Content ◽  
Recycled Polyethylene ◽  
Twin Screw ◽  
Nanofiller Content ◽  
Montmorillonite Nanoclay

Structure as well as mechanical and thermal properties of the nanocomposites based on recycled polyethylene terephthalate (RPET) are investigated. 1, 2 and 5 wt. % of unmodified montmorillonite nanoclay (MMT) were introduced in the RPET matrix by melt compounding in a twin screw extruder. Results of the investigations testify that optimum content of MMT for modification of RPET is between 1 and 2 wt. %. Up to this nanofiller weight content, the most rapid increase of stiffness, strength and impact toughness is observed. Besides it, at this nanofiller weight content the investigated composite have somewhat improved thermal resistance. It is demonstrated that the improvement of these properties is due to better distribution of MMT in the polymer matrix. At higher nanofiller content, the undesirable effects of the nanofiller agglomeration becomes more important.

Mechanical and Thermal Properties of Reactable Nano-SiO2/polyoxymethylene Composites

2012 ◽  
Vol 535-537 ◽  
pp. 103-109 ◽  
Author(s):  
Xiang Min Xu ◽  
Li Ping Guo ◽  
Yu Dong Zhang ◽  
Zhi Jun Zhang
Keyword(s):  
Thermal Properties ◽  
Impact Strength ◽  
Decomposition Temperature ◽  
Silica Content ◽  
Mechanical And Thermal Properties ◽  
Scanning Calorimetry ◽  
Degradation Temperature ◽  
Melt Compounding ◽  
Air Atmosphere ◽  
The Impact

The polyoxymethylene-based composites containing reactable nano-SiO2were prepared in a twin-screw extruder by melt compounding, and mechanical and thermal properties of pure polyoxymethylene (POM) and composites were investigated. The results showed that reactable nano-SiO2could reinforce the tensile strength and Young’s modulus of composites. To the impact strength of composites, there was obvious improvement when a small amount of silica was added into POM. With the increase of silica content, the impact strength of composites showed a gradually decrease trend. It was worthy to note that reactable nano-SiO2could significantly increase the decomposition temperature of POM. When the content of reactaSubscript textble nano-SiO2was up to 5 wt%, the degradation temperature of composites could increase about 38.3°C under nSubscript textitrogen atmosphere and 43.8°C under air atmosphere, respectively, compared with pure POM. Furthermore, the differential scanning calorimetry (DSC) analysis showed that reactable nano-SiO2had a good heterogeneous nucleation capability in POM, and could increase crystallization temperature of POM, but surface structure of reactable nano-SiO2was not propitious to the growth of POM crystals, accordingly leading to the decreasing crystallinity of composites.

Influence of Organo-Clay on Mechanical and Thermal Properties of O-Muscovite/PP Layered Silicate Nanocomposite

2011 ◽  
Vol 364 ◽  
pp. 174-180 ◽  
Author(s):  
Mohd Fadli Ahmad Rasyid ◽  
Md Akil Hazizan ◽  
Jamaliah Mohd Sharif
Keyword(s):  
Mechanical Properties ◽  
Thermal Properties ◽  
Layered Silicate ◽  
Clay Content ◽  
Filler Loading ◽  
Mechanical And Thermal Properties ◽  
Melt Compounding ◽  
Silicate Nanocomposites ◽  
Dsc Analyses ◽  
Organo Clay

O-Muscovite/PP Layered Silicate Nanocomposites were prepared via melt compounding using different filler content. Muscovite was organomodified with Cetyldimethylethylammonium bromide (CEDAB). The thermal and mechanical properties of nanocomposites, based on polypropylene (PP) filled by organo-clay (O-Muscovite), were studied in order to clarify the effect of O-Muscovite on the O-Muscovite/PP layered silicate nanocomposites by WAXD, TEM and DSC analyses. XRD indicated that O-Mica layers were intercalated and dispersed into polypropylene. Analysis of test data shows that, addition of organo-clay improved mechanical properties of O-Mica/PP nanocomposites. With the incorporation of 5 wt% O-Mica (optimal filler loading) into polypropylene Izod impact increased to 23%. The DSC analyses have shown that the influence of organo-clay on the thermal properties of material was significant in composites with O-Mica as fillers, compared to virgin PP. The enhancements of properties can be caused by the formation of intercalated and exfoliation nanocomposite structure at this clay content and stronger interaction of O-Mica with polymer matrix. At a higher filler loading, degradation in mechanical properties maybe attributes to the formation of agglomerated clay tactoids. O-Muscovite/PP Layered Silicate Nanocomposites were prepared via melt compounding using different filler content. Muscovite was organomodified with cetyltrimethylammoniumbromide (CTAB). The thermal and mechanical properties of nanocomposites, based on polypropylene (PP) filled by organo-clay (O-Muscovite), were studied in order to clarify the effect of O-Muscovite on the O-Muscovite/PP layered silicate nanocomposites by WAXD, TEM and DSC analyses. XRD indicated that O-Mica layers were intercalated and dispersed into polypropylene. It was found that the mechanical and thermal properties of organo-clay nanocomposite possess better properties as compared to the unmodified clay nanocomposites. The reason was partly due to the formation of intercalated and exfoliation nanocomposite structure at this clay content and stronger interaction of O-Mica with polymer matrix.

Effect of Algerian Halloysite on the Mechanical and Thermal Properties of Starch-Grafted-Polyethylene Nanocomposites

2018 ◽  
Vol 762 ◽  
pp. 192-196 ◽  
Author(s):  
Walid Fermas ◽  
Remo Merijs Meri ◽  
Mustapha Kaci ◽  
Janis Zicans
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Thermal Properties ◽  
Melt Flow Index ◽  
Halloysite Nanotubes ◽  
Polymer Chains ◽  
Flow Index ◽  
Mechanical And Thermal Properties ◽  
Melt Compounding

This paper deals with the characterization of the physico-mechanical properties of starch-grafted-polyethylene (Starch-g-PE)/unmodified Algerian halloysite nanotubes (HNT) nanocomposites prepared by melt compounding. The nanoclay was incorporated at various filler contents, i.e., 1.5, 3 and 5 wt%. Rheological and tensile properties of the nanocomposites were evaluated by different techniques and the results obtained are compared with those of virgin Starch-g-PE matrix. The study shows a decrease in melt flow index (MFI) values upon increasing the HNT content, which indicates a restriction in the polymer chains mobility due to the confinement effect of HNT. Further, a tensile strength is also improved.

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