A Comparative Study on Curing Characteristics, Mechanical Properties, Swelling Behavior, Thermal Stability, and Morphology of Feldspar and Silica in SMR L Vulcanizates

2005 ◽  
Vol 43 (5) ◽  
pp. 1323-1344 ◽  
Author(s):  
H. Ismail ◽  
H. Osman ◽  
A. Ariffin
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Comparative Study ◽  
Swelling Behavior ◽  
Curing Characteristics

Study on Properties of Modified Porous Starch/ Natural Rubber Composite

2014 ◽  
Vol 941-944 ◽  
pp. 294-300 ◽  
Author(s):  
Xue Mei Pan ◽  
Min Wu ◽  
Si Dong Li ◽  
Lin Fang ◽  
Zhi Feng Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Natural Rubber ◽  
Water Resistance ◽  
Natural Rubber Latex ◽  
Swelling Behavior ◽  
Modified Starch ◽  
Rubber Latex ◽  
Solvent Resistance ◽  
Rubber Composite

The porous starch was modified by xanthates, and the starch/natural rubber composite was prepared by blending the modified starch with natural rubber latex. The morphology, thermal stability, swelling behavior and mechanical properties of the composite were investigated. Morphology studies by SEM showed that the modified porous starch were homogeneously dispersed in NR matrix. The composite has higher solvent resistance and lower water resistance after adding modified porous starch. The mechanical properties of composite are improved significanly with the increase of modified porous starch.

scholarly journals Tough Hydrogels Based on Maleic Anhydride, Bulk Properties Study and Microfiber Formation by Electrospinning

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 972
Author(s):  
Faiza Bettahar ◽  
Fadila Bekkar ◽  
Leyre Pérez-Álvarez ◽  
Mohammed Issam Ferahi ◽  
Rachid Meghabar ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Wound Healing ◽  
Maleic Anhydride ◽  
Swelling Behavior ◽  
Bulk Properties ◽  
Swelling Capacity ◽  
Maleic Anhydride Copolymers

Hydrogels present a great number of advantages, such as their swelling capacity or their capability to mimic tissues, which make them very interesting biomaterials. However, one of their main disadvantages is their lack of good mechanical properties, which could limit some of their applications. Several strategies have been carried out to develop hydrogels with enhanced mechanical properties, but many of the suggested synthetic pathways to improve this property are expensive and time consuming. In this work, we studied an easy synthetic path to produce tough hydrogels based on different maleic anhydride copolymers crosslinked with polyethylenglycol. The effect of the comonomers in the mechanical properties has been studied, their excellent mechanical properties, good swelling behavior and thermal stability being remarkable. In addition, in order to evaluate their possible applications as scaffolds or in wound healing applications, microsized fibers have been fabricated by electrospinning.

scholarly journals Application of Silica Supported Calix[4]arene Derivative as Anti-reversion Agent in Tire Tread Formulation

2021 ◽  
Vol 68 (1) ◽  
pp. 128-136
Author(s):  
Hediye Mohamadi ◽  
Fereshteh Motiee ◽  
Saeed Taghvaei-Ganjali ◽  
Mandana Saber-Tehrani
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Temperature Rise ◽  
Tensile Testing ◽  
Polymer Chains ◽  
Arene Derivative ◽  
Oh Groups ◽  
Test Pieces ◽  
Curing Characteristics ◽  
Thermal Stability Of

In this research the influence of the silica supported calix[4]arene derivative (SS-Calix) on the reversion resistance, mechanical properties and thermal behavior of NR/BR tire tread formulation was investigated by the oscillating disc rheometer, FTIR, TGA and tensile testing. The results revealed that the reversion behavior of NR/BR vulcanizate is affected by SS-Calix. The data obtained from curing characteristics and thermal stability of test pieces indicate that, SS-Calix acts as an anti-reversion for rubbery materials that are exposed to thermal shock in the early stages of temperature rise. It’s predicted that these results are due to the interaction between the OH groups present in the SS-Calix surface and the carbon of the polymer chains. The broad peak observed in the IR spectrum around 1824 cm−1 which is referred to C=O bond, confirms this prediction. In addition, the presence of SS-Calix in compound causes to increase modulus and hardness but reduce elongation and resilience.

Comparative Study of Polyimides Containing Oxadiazole and Ether Groups

2009 ◽  
Vol 21 (5) ◽  
pp. 522-534 ◽  
Author(s):  
Maria Bruma ◽  
Mariana Dana Damaceanu ◽  
Peter Muller
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
High Temperature ◽  
Comparative Study ◽  
Aromatic Diamine ◽  
Polycondensation Reaction ◽  
Free Standing ◽  
Aromatic Polyimides ◽  
Film Forming ◽  
As Solubility

An aromatic diamine with a preformed oxadiazole ring and various dianhydrides with ether and other flexible or bulky groups, such as isopropylidene, hexafluoroisopropylidene, cyclohexylidene or fluorenylidene, were used in a polycondensation reaction at high temperature to produce poly(oxadiazole-ether-imide)s. The properties of these polymers such as solubility, film-forming ability, thermal stability and photoluminescence were studied and compared with those of related conventional aromatic polyimides. The mechanical properties of the free-standing films obtained from these polyimides were also investigated.

The Effect of Silane Coupling Agent on the Properties of Natural Rubber Filled with Waste Silicon Carbide

2017 ◽  
Vol 737 ◽  
pp. 236-241
Author(s):  
Apaipan Rattanapan ◽  
Pornsri Sapsrithong ◽  
Surakit Tuampoemsab
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Natural Rubber ◽  
Abrasion Resistance ◽  
Swelling Behavior ◽  
Peak Hardness ◽  
Rubber Compounds ◽  
Curing Characteristics ◽  
Silane Coupling ◽  
Cure Time

The effect of a silane coupling on curing characteristics, mechanical properties, abrasion behavior and swelling behavior of waste silicon carbide filled natural rubber compounds was investigated in the concentration 3%, 6%, 9%, 12% and 15% by weight of the particles. The waste silicon carbide content in this study was fixed at 30 phr in order to reveal the influence of silane-69 used to modify silicon carbide. The rubber compounds were prepared using a laboratory two roll mill with temperature maintained at 50°C. The curing characteristics of the composites were determined and the composites were vulcanized at 160°C using a hot press. The properties of the natural rubber compounds such as modulus at 200% elongation, stress at peak, hardness, abrasion resistance and swelling behavior were studied. Results indicate that the maximum torque of the natural rubber compounds increased with increasing silane-69 content whereas the silane-69 can be used without much effect on the scorch time and cure time. Increasing silane-69 content also gives natural rubber compounds better resistance towards swelling and increases the modulus at 200% elongation, tensile strength, hardness and abrasion resistance. The dispersion morphology of silicon carbide in the natural rubber composites was observed by scanning electron microscopy. The modified particles with improved interfacial adhesion between waste silicon carbide and natural rubber. Improvement in mechanical properties of the composites was obtained.

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