Effect of layered silicates on rheological and mechanical properties and thermal stability of high-molar mass polydimethylsiloxane matrix

e-Polymers ◽  
2011 ◽  
Vol 11 (1) ◽  
Author(s):  
Veronika Rabova ◽  
Petr Hron
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Tensile Strength ◽  
Silicone Rubber ◽  
Molar Mass ◽  
Strength Increase ◽  
Weight Decay ◽  
High Molar Mass ◽  
Surface Modified ◽  
Thermal Stability Of

AbstractThe effect of surface modified fillers based on montmorillonite on rheological and mechanical properties and thermal stability of high-molar mass polydimethylsiloxane matrix was evaluated. Silicone rubber/clay composites were prepared via homogenisation on open two roll-mill followed by torque measurement at two different temperatures. At 30 °C and 100 °C the torque did not extremely differ excepting the mixtures containing Cloisite 15A where it achieved the maximum at 3 phr montmorillonite content, but the tensile strength reached the similar values in all mixtures. Thermogravimetric analysis was utilized to find out the differences in weight decay of composites in silicone rubber/montmorillonite mixtures and in unfilled silicone rubber. Synergism of fillers was also studied and led to tensile strength increase.

Thermal Stability of Mechanical Properties of Copper after Equal-Channel Angular Pressing

2008 ◽  
Vol 584-586 ◽  
pp. 960-965 ◽  
Author(s):  
Tamara Kravchenko ◽  
Alexander Korshunov ◽  
Natalia Zhdanova ◽  
Lev Polyakov ◽  
Irina Kaganova
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Tensile Strength ◽  
Chemical Composition ◽  
Yield Strength ◽  
Equal Channel Angular Pressing ◽  
Angular Pressing ◽  
Different Temperatures ◽  
Thermal Stability Of

Annealed oxygen-free and tough-pitch copper samples have been processed by equalchannel angular pressing (ECAP) by route BC. The samples included 8 x 8 mm section pieces and a 40 mm diameter bar. Thermal stability was assessed based on the changes in the standard mechanical properties (conventional yield strength, tensile strength, elongation, proportional elongation and contraction) after annealing at different temperatures for 1 hour. Thermal stability of the same grade of material has been found to be different for different batches and to depend on the structural conditions of deformed material. The zone of thermal stability for copper of the two grades of interest does not depend on the material’s chemical composition.

High molar mass silicone rubber reinforced with montmorillonite clay masterbatches: Morphology and mechanical properties

2010 ◽  
Vol 46 (5) ◽  
pp. 881-890 ◽  
Author(s):  
Manuela L.Q.A. Kaneko ◽  
Rafaelle Bonzanini Romero ◽  
Maria do Carmo Gonçalves ◽  
Inez V.P. Yoshida
Keyword(s):  
Mechanical Properties ◽  
Silicone Rubber ◽  
Molar Mass ◽  
Montmorillonite Clay ◽  
High Molar Mass ◽  
Morphology And Mechanical Properties

Increased thermal stability of a poled electro-optic polymer using high-molar-mass fractions

2004 ◽  
Vol 70 (4) ◽  
Author(s):  
Ralph P. Bertram ◽  
Nils Benter ◽  
Dirk Apitz ◽  
Elisabeth Soergel ◽  
Karsten Buse ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Molar Mass ◽  
High Molar Mass ◽  
Electro Optic ◽  
Mass Fractions ◽  
Thermal Stability Of

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.

scholarly journals THE EFFECT OF FIBER CONTENT ON COTTON REINFORCED ALBUMEN COMPOSITES

2011 ◽  
Vol 12 (2) ◽  
pp. 131-144 ◽  
Author(s):  
Yusof Yusliza ◽  
Ahmad Zuraida
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Tensile Strength ◽  
Cotton Fiber ◽  
Mechanical Performance ◽  
Impact Resistance ◽  
Morphological Structure ◽  
Fiber Content ◽  
X Ray ◽  
Thermal Stability Of

ABSTRACT : The effect of fiber content on mechanical properties and thermal stability of the cotton/albumen composites (CAC) were investigated and presented in this paper. The composites having 0%, 3%, 6%, 10%, 13 %, and 16% w/w of cotton fiber were considered.  Hands lay-up technique was used to prepare the CAC specimens and dried for 24 hours before characterised and evaluated for their mechanical performance. The structure and thermal stability of the composites were characterized by using x-ray and thermogravimetry analysis, respectively. The tensile strength and impact resistance of CAC are found maximum with the value of 8.7 MPa and 19.0 kJ/m2, respectively. Analysis on the morphological structure by SEM revealed that the mechanical properties of the composites depend on good wettability and adhesion between fiber/matrix.

scholarly journals Study of 4,4‘-Methylene Diisocyanate Phenyl Ester-Modified Cassava Residues/Polybutylene Succinate Biodegradable Composites: Preparation and Performance Research

Processes ◽  
2019 ◽  
Vol 7 (9) ◽  
pp. 588
Author(s):  
Lijie Huang ◽  
Hanyu Zhao ◽  
Hao Xu ◽  
Shuxiang An ◽  
Chunying Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Contact Angle ◽  
Tensile Strength ◽  
Water Absorption ◽  
Bending Strength ◽  
Phenyl Ester ◽  
Biodegradable Composites ◽  
Polybutylene Succinate ◽  
Thermal Stability Of

Biomass materials have become a research focus for humankind, due to the decreasing availability of fossil fuels and the increasing release of greenhouse gas. In this work, we prepared biodegradable composites with waste cassava residues and polybutylene succinate (PBS) by modifying cassava residues using 4,4’-methylene diisocyanate phenyl ester (MDI) and tested their properties. The effects of MDI modification on the structure, mechanical properties, water absorption, microstructure, and thermal stability of the composites were studied via Fourier transform infrared spectroscopy, contact angle measurement, mechanical property testing, water absorption analysis, scanning electron microscopy, and thermogravimetric analysis, respectively. The results showed that the tensile strength and flexural strength of the material increased by 72% and 20.89%, respectively, when the MDI-modified cassava residue content was 30%. When 10% MDI-modified cassava residues were added, the tensile strength increased by 19.46% from 16.96 MPa to 20.26 MPa, while the bending strength did not change significantly. The water contact angle of the MDI-treated cassava residues exceeded 100°, indicating excellent hydrophobicity. Thus, MDI modification can significantly improve the mechanical properties and thermal stability of the biocomposite. The composites were immersed in distilled water for 96 h. The water absorption of the cassava residues/PBS composite was 2.19%, while that of the MDI-modified cassava residues/PBS composite was 1.6%; hence, the water absorption of the MDI-modified cassava residues/PBS composite was reduced to 26.94%. This technology has wide application potential in packaging, construction, and allied fields.

Improvement of Mechanical Properties of CNT/Epoxy Nano Composites Using the B4C by Taguchi Method

2017 ◽  
Vol 900 ◽  
pp. 105-109
Author(s):  
Mustafa Taşyürek ◽  
Cihad Nazik
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Tensile Strength ◽  
Taguchi Method ◽  
Hybrid Nanocomposites ◽  
Nano Composites ◽  
Hybrid Nanocomposite ◽  
Multi Walled Carbon Nanotube ◽  
Optimum Sample ◽  
Thermal Stability Of

In this study, production and mechanical properties of the hybrid nanocomposite were investigated experimentally and estimated. Hybrid nanocomposites include boron carbide (B4C) and multi walled carbon nanotube (CNT) in the epoxy resin. B4C and CNT mixed into the epoxy with different percentages and produced. Tensile strength values of the produced samples was determined and compared. Thermal stability of the samples was analyzed by TGA. Samples are diversified by Taguchi method. The optimum sample was determined by comparison of the experimental and estimated results. Finally, the effects on each of the parameters were determined.

scholarly journals Study on Thermal Properties and Mechanical Properties of Short-cut Polyimide-Fiber Reinforced Polyphenyl Sulfone Composites

2019 ◽  
Vol 264 ◽  
pp. 02003
Author(s):  
Weizhou Yao ◽  
Jianan Yao ◽  
Qing Jiao ◽  
Yunhai Wei ◽  
Tianpeng Yu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Thermal Stability ◽  
Tensile Strength ◽  
Heat Resistance ◽  
Bending Strength ◽  
Limited Effect ◽  
Polyimide Fiber ◽  
Heat Deformation ◽  
Thermal Stability Of

In order to increase the thermal stability and mechanical property of PPSU, two different polyimide (PI) short cut fibers reinforced polyphenyl sulfone (PPSU) composites were prepared by melt extrusion using a threescrew extruder. In addition, the effects of fiber lengths on thermal stability, heat resistance and mechanical properties of the composites was studied. The results indicate that the addition of polyimide chopped fiber can greatly improve the heat resistance of the composites. Comparing with PPSU, with the increasing of fiber content, the heat deformation temperature (HDT) of composites increased from 205 °C to 229 °C, but the addition of polyimide fiber has limited effect on the thermal stability of the composites. Meanwhile, the addition of polyimide chopped fiber can also improve the mechanical properties of the composites. Compared with PPSU, the tensile strength of composites can be increased by 102%, and the bending strength can be raised by 117%.

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