Waste newsprint fibers for the reinforcement of radiation-cured (styrene-butadiene rubber)-based composites. Part ii characterization and thermal properties

2012 ◽  
Vol 18 (4) ◽  
pp. 228-234 ◽  
Author(s):  
Khaled F. El-Nemr ◽  
Magdy A. Ali ◽  
Medhat M. Hassan
2015 ◽  
Vol 44 (2) ◽  
pp. 57-73 ◽  
Author(s):  
Salwa H El-Sabbagh ◽  
Nivin M. Ahmed

Purpose – This paper aims to express in detail the rheological, morphological and thermal properties of unpigmented and pigmented styrene-butadiene rubber composites with new prepared inorganic pigment based on kaolin covered with a thin layer of calcium and magnesium oxides or mixed oxide of both together. These new pigments combine the properties of both their constituents (kaolin and metal oxides), which are a new trend in inorganic pigments called core-shell pigments. The pigments used for comparison are kaolin (K), CaO/kaolin (CaO/K), MgO/kaolin (MgO/K) and CaO.MgO/kaolin (CaO.MgO/K). Design/methodology/approach – The different pigments were characterized using different analytical and spectrophotometric techniques, such as X-ray diffraction, scanning electron microscopy/energy dispersive X-ray and transmission electron microscopy, while rubber vulcanizates' rheological, morphological, swelling and thermal properties were examined using different standard and instrumental testing and methods. Findings – The study revealed that there is a significant effect of the new prepared pigments on SBR properties, where the optimum pigment loading was 40 phr for CaO/kaolin, while it was 2.5 phr for MgO/kaolin. Studying the effect of different ratios of oxides on kaolin (5, 10 and 20 per cent), different loadings of these pigments ranging between 2.5 and 40 phr were done for each pigment. These modified kaolin or core-shell metal oxide/kaolin pigments imparted new and improved reinforcing properties to SBR vulcanizates. Research limitations/implications – No research limitations were found. Practical implications – Core-shell MgO/kaolin pigments are eco-friendly and can replace other expensive pigments that are usually used as fillers in the rubber industry with less expenses and comparable efficiency. Originality/value – These new pigments are cheap and efficient and can be used in different fields other than rubber.


2016 ◽  
Vol 717 ◽  
pp. 57-61
Author(s):  
Wei Liu ◽  
Zhong Cun Bao ◽  
Cheng Zhong Zong

Flexible fatigue properties is an important property of rubber, it can reflect the service life of rubber products. Different types of SSBR were used in the vulcanized rubber with NR contributed different to the flexible fatigue properties. In this paper, 5 different types of SSBR with special structure were used to study the mechanical properties, thermal properties and the flexible fatigue properties. In a result, with different types SSBR, the vulcanized rubber show different basic mechanical properties and flexible fatigue properties, but little effect to the hardness and stretching stress. Above all these SSBR, RC2564S is the best which contribute to flexible fatigue properties.


2015 ◽  
Vol 32 ◽  
pp. 43-50
Author(s):  
Rane Ajay Vasudeo ◽  
V.K. Abitha ◽  
P.S. Suchithra ◽  
K. Rajkumar

InIncorporation and dispersion of particulate fillers are the two steps that are necessary to achieve optimum properties in a rubber compound, i.e. mechanical, thermal properties. The incorporation and dispersion of particulate fillers depend on their particle size, smaller particle size is difficult to incorporate but easier to disperse in a rubber matrix while large dimension particle size filler are easier to incorporate but difficult to disperse. Hence, in the current work we have studied different methods of incorporating nano particles in to the matrix of styrene butadiene rubber and further rubber nanocomposites obtained were characterized for curative properties using, remote, thereafter determined for structural elucidation by using Fourier transform infrared spectroscopy, thermal properties through thermal gravimetric analysis, Physio-mechanical as well as morphology determination via transmission electron microscopy. In current work we have compared melt blending and solution blending methods for preparation of styrene butadiene rubber Nano Aluminium Tri hydroxide composites.


Polimery ◽  
2009 ◽  
Vol 54 (09) ◽  
pp. 648-653 ◽  
Author(s):  
GRAZYNA JANOWSKA ◽  
AGNIESZKA KUCHARSKA ◽  
JABUB KAWALEK ◽  
W£ADYS£AW M. RZYMSKI

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