scholarly journals Dynamically Cross-Linked Tannin as a Reinforcement of Polypropylene and UV Protection Properties

Polymers ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 102 ◽  
Author(s):  
Jingjing Liao ◽  
Nicolas Brosse ◽  
Antonio Pizzi ◽  
Sandrine Hoppe
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Thermal Properties ◽  
Weight Fraction ◽  
Accelerated Weathering ◽  
Surface Cracks ◽  
Tannin Content ◽  
Carbonyl Index ◽  
Internal Network ◽  
Dynamic Curing

Tannins were used as reinforcing components for polypropylene with anti-UV properties via dynamic curing extrusion. The influence of cross-linked tannins in different weight fraction and their anti-UV capacity on morphological, mechanical, rheological, crystallize and thermal properties were studied. The experimental results indicated that the cross-linked tannins improve Young’s modulus, crystallinity, and thermal stability and reinforce the internal network of polypropylene. After UV accelerated weathering, polypropylene had fewer surface cracks, lower carbonyl index, fewer crystallinity decreases and less mechanical properties loss with increasing tannin content.

Dispersion, mechanical and thermal properties of nano graphite platelets reinforced flouroelastomer composites

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
Deng Xu ◽  
V. Sridhar ◽  
Thanh Tu Pham ◽  
Jin Kuk Kim
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Tensile Strength ◽  
Thermal Properties ◽  
Thermogravimetric Analysis ◽  
Fracture Surface ◽  
Exfoliated Graphite ◽  
Mechanical And Thermal Properties ◽  
Reinforcing Fillers ◽  
Processing Of Composites

AbstractThe potential of exfoliated graphite nano platelets (xGnP™) as reinforcing fillers in flouroelastomer has been investigated. The dispersion of the nano graphite platelets in the polymer matrix has been investigated by WAXD, SEM, TEM, EPMA and AFM. WAXD studies indicated that the processing of composites did not change the inter-gallery distance (d-spacing) of the graphite platelets. The effect of increasing nano graphite loadings on mechanical properties like tensile strength, modulus and tear resistance has been studied. Formation of weld lines on the fracture surface of the composite has been observed by SEM. The thermal stability was determined using thermogravimetric analysis. The composites showed higher thermal stability in comparison with nonreinforced polymer.

Polybutadiene rubber/exfoliated graphite nanocomposites: Impact of filler on the thermal, mechanical and permeability characteristics

2019 ◽  
Vol 35 (3) ◽  
pp. 138-148
Author(s):  
Soney C George ◽  
Jiji Abraham ◽  
Thomasukutty Jose ◽  
Riya Thomas ◽  
Teresa Jacob ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Thermal Properties ◽  
Structural Characteristics ◽  
Nitrogen Atmosphere ◽  
Exfoliated Graphite ◽  
Melt Mixing ◽  
Permeability Characteristics ◽  
Polybutadiene Rubber ◽  
Permeation Studies

In this report, we demonstrate that both mechanical behaviour and thermal stability of polybutadiene rubber (PBR) nanocomposites could be improved by incorporating exfoliated graphite (EG) using melt mixing method. Incorporation of the filler EG in the polybutadiene (PBD) matrix is confirmed by infrared spectra and X-ray diffraction analysis. The structural characteristics, mechanical properties and thermal properties of these newly modified PBR nanocomposites were systematically analysed and studied. Thermal properties of the nanocomposites were studied using thermogravimetric analysis under nitrogen atmosphere. Thermogravimetric studies showed that PBR8 is having higher thermal stability than that of the PBR gum sample. Mechanical properties like tensile strength, Young’s modulus, tear strength, hardness and compression set of the nanocomposites were studied. Mechanical properties are also high for the modified PBR nanocomposites with maximum filler content. The permeability of organic vapours such as dichloromethane (CH2Cl2), chloroform (CHCl3) and carbon tetrachloride (CCl4) through PBR/EG nanocomposites was also studied. In vapour permeation studies, PBR4 exhibits the least permeability in CH2Cl2, CHCl3 and CCl4 solvents. Polybutadiene rubber–natural graphite (PBR/NG) nanocomposites were also prepared for comparison.

scholarly journals Mechanical and Thermal Properties of Montmorillonite-Reinforced Polypropylene/Rice Husk Hybrid Nanocomposites

Polymers ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1557 ◽  
Author(s):  
Khaliq Majeed ◽  
Ashfaq Ahmed ◽  
Muhammad Saifullah Abu Bakar ◽  
Teuku Meurah Indra Mahlia ◽  
Naheed Saba ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Thermal Properties ◽  
Rice Husk ◽  
Hybrid Nanocomposites ◽  
Commercial Application ◽  
Mechanical And Thermal Properties ◽  
Melt Mixing ◽  
Compatibilizing Agent ◽  
Thermal Stability Of

In recent years, there has been considerable interest in the use of natural fibers as potential reinforcing fillers in polymer composites despite their hydrophilicity, which limits their widespread commercial application. The present study explored the fabrication of nanocomposites by melt mixing, using an internal mixer followed by a compression molding technique, and incorporating rice husk (RH) as a renewable natural filler, montmorillonite (MMT) nanoclay as water-resistant reinforcing nanoparticles, and polypropylene-grafted maleic anhydride (PP-g-MAH) as a compatibilizing agent. To correlate the effect of MMT delamination and MMT/RH dispersion in the composites, the mechanical and thermal properties of the composites were studied. XRD analysis revealed delamination of MMT platelets due to an increase in their interlayer spacing, and SEM micrographs indicated improved dispersion of the filler(s) from the use of compatibilizers. The mechanical properties were improved by the incorporation of MMT into the PP/RH system and the reinforcing effect was remarkable as a result of the use of compatibilizing agent. Prolonged water exposure of the prepared samples decreased their tensile and flexural properties. Interestingly, the maximum decrease was observed for PP/RH composites and the minimum was for MMT-reinforced and PP-g-MAH-compatibilized PP/RH composites. DSC results revealed an increase in crystallinity with the addition of filler(s), while the melting and crystallization temperatures remained unaltered. TGA revealed that MMT addition and its delamination in the composite systems improved the thermal stability of the developed nanocomposites. Overall, we conclude that MMT nanoclay is an effective water-resistant reinforcing nanoparticle that enhances the durability, mechanical properties, and thermal stability of composites.

Thermal Stability of an Epoxy Adhesive

2014 ◽  
Vol 1053 ◽  
pp. 257-262
Author(s):  
Mei Li ◽  
Xiang Yu Zhao ◽  
Wei Shao ◽  
Chuan Bao Ma ◽  
Rui Xue Zheng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Thermal Properties ◽  
Epoxy Adhesive ◽  
Inert Gas ◽  
Curing Agent ◽  
Pure Epoxy ◽  
Different Levels ◽  
Thermal Stability Of ◽  
Better Than

An epoxy adhesive and its curing agent are tested using differential scaning calorimetry under different atmospheres and after different exposure times to natural air to analyze its thermal properties. The results show that after the pure epoxy, the curing agent and the adhesive mixture of them are exposed in natural air for different period of time, all show different levels of decline in thermal stability and more complicated reactions when tested in the DSC and TGA in O2 and air, while the thermal properties remain stable when they are tested in an inert gas like N2. And according to the mechanical property tests and SEM results, the mechanical properties of the adhesive mixture in N2 are better than that in air. The results indicate that inert gas can protect the property of this kind of adhesive and thus increase its bond strength.

Effect of Blend Ratio on the Mechanical and Thermal Properties of Polyurethane/Silicone Rubber Conductive Material

2018 ◽  
Vol 280 ◽  
pp. 264-269
Author(s):  
Heng Chun Wei ◽  
Teh Pei Leng ◽  
Yeoh Chow Keat
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Thermal Properties ◽  
Silicone Rubber ◽  
Conductive Filler ◽  
Material Testing ◽  
Testing System ◽  
Mechanical And Thermal Properties ◽  
Blend Ratio ◽  
Thermal Stability Of

This work reports on mechanical and thermal properties of a novel polymer blend. Blends were prepared by mixing silicone rubber with diphenyl – 4,4 – dissocyanate in different ratios. Graphene nanoplatelets was added as conductive filler to improve the electrical conductivity of the blends. The mechanical properties, including tensile and tear performances were measured by a material testing system. The thermal stability of the blends was measured by thermogravimetric analysis. Incorporation 20 vol.% of silicone rubber can help to improve the thermal stability of the blend, meanwhile optimum mechanical properties of the blends is achieved.

Improvement Properties of Recycled Polypropylene by Reinforcement of Coir Fiber

2009 ◽  
Vol 79-82 ◽  
pp. 2027-2030 ◽  
Author(s):  
Poonsub Threepopnatkul ◽  
Chanin Kulsetthanchalee ◽  
K. Bunmee ◽  
N. Kliaklom ◽  
W. Roddouyboon
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Thermal Properties ◽  
Testing Machine ◽  
Fiber Composites ◽  
Fiber Content ◽  
Mechanical And Thermal Properties ◽  
Gravimetric Analysis ◽  
Coir Fiber ◽  
Recycled Polypropylene

This research was to study the related mechanical and thermal properties of recycled polypropylene from post consumer containers reinforced with coir fiber. Surface of coir fiber was treated with sodium hydroxide to remove lignin and hemicelluloses and likely to improve the interfacial adhesion in the composites. The composites of treated coir fiber and recycled polypropylene were prepared by varying the coir fiber contents at 5%, 10% and 20% by weight using a twin screw extruder. The thermal properties were investigated by thermal gravimetric analysis (TGA) and differential scanning calorimeter (DSC). The results from TGA showed that thermal stability of the composites was lower than that of recycled polypropylene resin and thermal stability decreased with increasing coir fiber content. From DSC results, it indicated that the crystallinity of treated coir fiber composites increased as a function of fiber content. The mechanical properties of injection-molded samples were studied by universal testing machine. The treated coir fiber composites produced enhanced mechanical properties. The tensile strength, tensile modulus and impact strength of modified coir fiber/recycled polypropylene composites increased as a function of coir fiber content.

Hybridization effect of coir fiber on physico-mechanical properties of polyethylene-banana/coir fiber hybrid composites

2018 ◽  
Vol 25 (1) ◽  
pp. 133-141 ◽  
Author(s):  
Nirupama Prasad ◽  
Vijay Kumar Agarwal ◽  
Shishir Sinha
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Water Absorption ◽  
Hybrid Composites ◽  
Relative Weight ◽  
Weight Fraction ◽  
Absorption Capacity ◽  
Coir Fiber ◽  
Banana Fiber ◽  
Composite Samples

AbstractIn this paper, an attempt has been made to investigate the effect of coir fiber addition along with the banana fiber in low-density polyethylene (LDPE) to develop cost-effective and high-performance composite material. The composite samples were prepared at fixed fiber content (25 wt%) and with varying relative weight fraction of banana and coir fiber using compression molding technique. The effect of hybridization was analyzed through the mechanical properties (tensile, flexural, and impact), thermal stability, morphological behavior, and water absorption behavior. Additionally, scanning electron microscopy studies had been carried out on the tensile fractured surface for all composite samples to examine the fracture behavior of the composite samples. The results showed that the incorporation of coir fiber into the banana fiber composites of up to 50% by weight led to enhancement of the mechanical properties and thermal stability and to reduction of the water absorption capacity of the banana fiber/LDPE composites.

scholarly journals Identification of the Physical and Mechanical Properties of Moroccan Sisal Yarns Used as Reinforcements for Composite Materials

Fibers ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 13
Author(s):  
Zineb Samouh ◽  
Omar Cherkaoui ◽  
Damien Soulat ◽  
Ahmad Rashed Labanieh ◽  
François Boussu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Contact Angle ◽  
Thermal Properties ◽  
Elastic Modulus ◽  
Composite Materials ◽  
Twist Angle ◽  
Physical And Mechanical Properties ◽  
Sisal Fiber ◽  
Method Show

This work aims to investigate the physical and mechanical properties of sisal fiber and yarn of Moroccan origin. The cellulosic and non-cellulosic constituents of the Moroccan sisal fiber were identified by FTIR spectroscopy. The thermal properties were studied by thermogravimetric analysis. The hydrophilicity of the fiber was evaluated by the contact angle. The results show that the sisal fiber has a low thermal stability. The mechanical properties of the fiber analyzed by the Impregnated Fiber Bundle Test (IFBT) method show that the porosity of the impregnated yarns and the twist angle of the yarns influence the elastic modulus of the sisal fiber. The physical and mechanical properties of the manufactured sisal yarns were also characterized and analyzed. The obtained results reveal an interesting potential to use the Moroccan sisal fiber in development of bio-sourced composite materials.

Thermal and mechanical properties of nanocomposites based on polyethylene and Mg/Al hydrotalcite

2016 ◽  
Vol 1817 ◽  
Author(s):  
L.Y. Jaramillo ◽  
J.C. Posada-Correa ◽  
E. Pabón-Gelves ◽  
E. Ramos-Ramírez ◽  
N.L. Gutiérrez-Ortega
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Thermal Properties ◽  
Structural Analysis ◽  
Tensile Tests ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Melt Blending ◽  
Thermal And Mechanical Properties ◽  
Linear Low Density Polyethylene

ABSTRACTIn this work there was studied the effect of nano-Mg/Al hydrotalcite (NHT) as filler on maleic anhydride grafted linear low density polyethylene (LLDPE-g-MA). NHT was synthesized by the coprecipitation method with a ratio of Mg/Al=6 and nanocomposites were prepared using 1, 3 and 5 %wt of filler via melt-blending.Morphological and structural analysis of NHT were performed and for nanocomposites, tensile tests and thermal properties were measured. Results showed that filler was well dispersed in the LLDPE matrix, mechanical properties were enhanced in most of the cases and thermal stability improvements were achieved in the nanocomposites.

Sign in / Sign up

Export Citation Format

Share Document