Effects of gamma irradiation on structural, thermal and mechanical properties of polyamide-11/halloysite nanotubes nanocomposites

2021 ◽  
pp. 089270572110319
Author(s):  
Mohamed Sahnoune ◽  
Mustapha Kaci ◽  
Hélène Garay ◽  
José-Marie Lopez-Cuesta ◽  
Mohamed Mahlous
Keyword(s):  
Mechanical Properties ◽  
Gamma Irradiation ◽  
Irradiation Dose ◽  
Chain Scission ◽  
Halloysite Nanotubes ◽  
Thermal And Mechanical Properties ◽  
Polyamide 11 ◽  
Irradiation Test ◽  
Twin Screw ◽  
Low Irradiation

The effect of gamma irradiation on neat Polyamide-11 (PA11) and PA11 filled with 3 wt% of halloysite nanotubes (HNTs) was investigated at various doses up to 100 kGy in air and at room temperature. The irradiation test was conducted on sample films prepared by a twin-screw extruder in the first step then cast extrusion. The study showed the formation of a maximum of gel fraction up to 10 and 20 kGy for neat PA11 and PA11/HNTs, respectively. Furthermore, the results indicated the occurrence of crosslinking at low irradiation dose, whereas chain scission took place at higher ones. Additionally, the results revealed that the presence of HNTs limits the impacts of gamma irradiation through a barrier effect. An optimum irradiation dose was found for thermal and mechanical properties, corresponding to the dose for maximum gel formation. Moreover, experimental design was implemented to highlight the main incidences and interactions of both halloysite incorporation and radiation dose on some relevant effects of gamma irradiation.

A novel recycled polyethylene terephthalate/polyamide 11 (rPET/PA11) thermoplastic blend

2021 ◽  
pp. 147776062110010
Author(s):  
Zahid Iqbal Khan ◽  
Zurina Binti Mohamad ◽  
Abdul Razak Bin Rahmat ◽  
Unsia Habib ◽  
Nur Amira Sahirah Binti Abdullah
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Flexural Strength ◽  
Polyethylene Terephthalate ◽  
Practical Implication ◽  
Polyamide 11 ◽  
Recycled Polyethylene ◽  
Twin Screw ◽  
Electron Microscopy Analysis ◽  
The Impact

This work explores a novel blend of recycled polyethylene terephthalate/polyamide 11 (rPET/PA11). The blend of rPET/PA11 was introduced to enhance the mechanical properties of rPET at various ratios. The work’s main advantage was to utilize rPET in thermoplastic form for various applications. Three different ratios, i.e. 10, 20 and 30 wt.% of PA11 blend samples, were prepared using a twin-screw extruder and injection moulding machine. The mechanical properties were examined in terms of tensile, flexural and impact strength. The tensile strength of rPET was improved more than 50%, while the increase in tensile strain was observed 42.5% with the addition of 20 wt.% of PA11. The improved properties of the blend were also confirmed by the flexural strength of the blends. The flexural strength was increased from 27.9 MPa to 48 MPa with the addition of 30 wt.% PA11. The flexural strain of rPET was found to be 1.1%. However, with the addition of 10, 20 and 30 wt.% of PA11, the flexural strain was noticed as 1.7, 2.1, and 3.9% respectively. The impact strength of rPET/PA11 at 20 wt.% PA11 was upsurged from 110.53 to 147.12 J/m. Scanning electron microscopy analysis revealed a dispersed PA11 domain in a continuous rPET matrix morphology of the blends. This work practical implication would lead to utilization of rPET in automobile, packaging, and various industries.

Effect of electron-beam and gamma-irradiation on physicochemical and mechanical properties of polypropylene syringes as a function of irradiation dose: Study under vacuum

2007 ◽  
Vol 76 (7) ◽  
pp. 1147-1155 ◽  
Author(s):  
Athanasia T. Fintzou ◽  
Michael G. Kontominas ◽  
Anastasia V. Badeka ◽  
Mario R. Stahl ◽  
Kyriakos A. Riganakos
Keyword(s):  
Mechanical Properties ◽  
Electron Beam ◽  
Gamma Irradiation ◽  
Irradiation Dose ◽  
Dose Study

Mechanical and Thermal Properties of Ternary System Based on Starch-Grafted-Polyethylene/High Density Polyethylene/Halloysite Nanocomposites

2019 ◽  
Vol 800 ◽  
pp. 210-215
Author(s):  
Walid Fermas ◽  
Mustapha Kaci ◽  
Remo Merijs Meri ◽  
Janis Zicans
Keyword(s):  
Mechanical Properties ◽  
High Density Polyethylene ◽  
Chemical Structure ◽  
Filler Content ◽  
Halloysite Nanotubes ◽  
High Density ◽  
Flexural Properties ◽  
Mechanical And Thermal Properties ◽  
Thermal And Mechanical Properties ◽  
Content Ratio

In this paper, the effect of unmodified halloysite nanotubes (HNTs) content on the chemical structure and the thermal and mechanical properties of blends based on starch-grafted-polyethylene (SgP) and high density polyethylene (HDPE) (70/30 w/w) nanocomposites was investigated at various filler content ratios, i.e. 1.5, 3 and 5 wt.%. The study showed the occurrence of chemical interactions between the polymer matrix and HNTs through OH bonding. Further, the addition of HNTs to the polymer blend led to an increase in the crystallization temperature of the nanocomposite samples, in particular at higher filler contents i.e. 3 and 5 wt.%, while the melting temperature remained almost unchanged. Tensile and flexural properties of the nanocomposite samples were however improved compared to the virgin blend with respect to the HNTs content ratio.

Influence of Multifunctional Monomers on Gamma Irradiated Polylactic Acid

2015 ◽  
Vol 804 ◽  
pp. 59-62 ◽  
Author(s):  
Kantima Chaochanchaikul ◽  
Wanlop Harnnarongchai
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Polylactic Acid ◽  
Irradiation Dose ◽  
Crosslinking Agent ◽  
Chain Scission ◽  
Chain Extension ◽  
Molecular Characteristics ◽  
High Irradiation Dose ◽  
Gamma Irradiated

The aim of this work was to compare and discuss the influence of multifunctional monomers as crosslinking agent (Triallyl Isocyanurate; TAIC) and chain extender (Joncryl ADR4368) on the gamma irradiated Polylactic acid (PLA). The modified PLA samples with varying amount of TAIC and Joncryl were characterized by observing the molecular characteristics and mechanical properties. The results showed that irradiated PLA had lower average molar mass and mechanical properties compared to non-irradiated PLA due to irradiation induced chain scission. Gel content was observed and increased with increasing irradiation dose for the TAIC modified sample, indicating that the further crosslink of irradiated PLA was occurring. Crosslinking and chain extension were responsible for the improved modulus and tensile strength of irradiated PLA, however the decrease in tensile strength at high irradiation dose was observed for crosslinked PLA.

Enhancement of Mechanical Properties of ABS/PC-HNT Nano Composites

2018 ◽  
Vol 24 (8) ◽  
pp. 6000-6003
Author(s):  
Y. Narendra Babu ◽  
M. Venkateswara Rao ◽  
A. Gopala Krishna
Keyword(s):  
Mechanical Properties ◽  
Matrix Material ◽  
Acrylonitrile Butadiene Styrene ◽  
Halloysite Nanotubes ◽  
Mechanical Tests ◽  
Screw Extruder ◽  
Nano Composite ◽  
Melt Compounding ◽  
Twin Screw ◽  
Butadiene Styrene

The objective of this paper is to experimentally study tensile strength, Impact strength, Flexural strength and Wear Characteristics of the Nano tubular material Halloysite Nanotubes (HNT) into ABS/PC blend with ABS and PC compositions in the ratio 40/60. We have fabricated the Thermoplastic Nanocomposites specimens as per ASTM standards, with the Acrylonitrile Butadiene Styrene (ABS) and Polycarbonate (PC) blend as matrix material and with 1%, 2%, 3%, 4%, 5% and 6% HNT reinforcement material using Co–Rotating Intermeshing Twin Screw Extruder by Melt Compounding. Mechanical Tests were conducted and results were compared with the original ABS/PC blend. Effects of Halloysite Nanotubes reinforcement percentage were discussed in detail. The obtained results suggested that ABS/PC (40/60) blend with 4% reinforcement of Halloysite Nanotubes executed better mechanical properties. SEM is used to study the failure mechanism of the proposed Nano composite.

Study of the effect of gamma irradiation on a commercial polycyclooctene I. Thermal and mechanical properties

2014 ◽  
Vol 102 ◽  
pp. 108-116 ◽  
Author(s):  
N. García-Huete ◽  
J.M. Laza ◽  
J.M. Cuevas ◽  
J.L. Vilas ◽  
E. Bilbao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Gamma Irradiation ◽  
Thermal And Mechanical Properties

Morphological, Thermal and Mechanical Properties of Poly(Lactic Acid)/Cellulose/ Nano-Clay Composite

2020 ◽  
Vol 856 ◽  
pp. 331-338
Author(s):  
Sirisart Ouajai ◽  
Suttinun Phongtamrug
Keyword(s):  
Mechanical Properties ◽  
Flexural Modulus ◽  
Poly Lactic Acid ◽  
Thermal And Mechanical Properties ◽  
Screw Extruder ◽  
Scanning Calorimetry ◽  
Chemically Modified ◽  
Nano Clay ◽  
Twin Screw ◽  
Modified Cellulose

This research has focused on the effect of modified cellulose and clay on the thermal and mechanical properties of PLA bio-nanocomposite. Cellulose was chemically modified with silane coupling agent in order to enhance compatiblization with PLA. Successful modification was confirmed by Fourier Transform Infrared Spectroscopy and EDX-SEM. PLA was compounded with various amounts and ratios of the modified cellulose and clay by a twin-screw extruder. Thermal properties of the bio-nanocomposites were characterized by Thermogravimetric Analysis and Differential Scanning Calorimetry. Glass transition temperature of the bio-nanocomposite slightly decreased whereas melting temperature remained constant when the amount of both fillers was increased. In addition, crystallization behaviour of PLA has been influenced by the type and amount of the fillers. Clay showed a greater effect on the crystallization of PLA than the modified cellulose and unmodified one, respectively. The flexural modulus of the composite containing equal amount between clay and cellulose was increased with an increasing in fillers contents. But the flexural and impact strength of composite were gradually decreased with an increase in fillers contents. Variation of clay and cellulose ratio resulted in the change of mechanical properties. The composite containing higher ratio between clay:cellulose or cellulose:clay showed a better mechnical properties comparing to the ratio of clay:cellulose equal to 1:1.

Sign in / Sign up

Export Citation Format

Share Document