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Effect of fillers on morphological and wear characteristics of NR/HSR blends with E-glass fiber
Pal, Kaushik,Pal, Samir K.,Das, Chapal K.,Kim, Jin Kuk Elsevier 2012 MATERIALS AND DESIGN Vol.35 No.-
<P><B>Highlights</B></P><P>► The blends of high styrene rubber (HSR) and natural rubber (NR) with E-glass fiber was prepared. ► ISAF type of CB showed a significant effect on curing and mechanical properties. ► Blends containing ISAF type of CB showed high abrasion resistant against Du-Pont and DIN abrader and different mining rocks. ► Blends containing ISAF type of CB found to be the toughest rubber against rock.</P> <P><B>Abstract</B></P><P>The blends of high styrene rubber (HSR) and natural rubber (NR) with E-glass fiber was prepared using a blending technique in presence of different types of carbon black. The effect of filler on morphological and wear characteristics was studied. ISAF type of carbon black showed a significant effect on optimum cure time, cure rate index and mechanical properties by reacting at the interface between HSR and NR matrix. All the samples show only one melting peak on the DSC curve; this is attributed to the same backbone structure of the matrix and the carbon black reinforcement. The rate of degradation was almost the same up to 90% degradation for all the samples except NSF-1 and NSF-4, may be due to the mixing of N110 and N774 type of carbon black. Blends containing ISAF type of carbon black showed high abrasion resistant properties against Du-Pont abrader, DIN abrader and different mining rock surfaces and also is found to be the toughest rubber against all types of rock.</P>
Characterization of Rock Materials based on Signal Emission levels Under Uni-Axial Compression
K.U.M. Rao,Subir Kumar Ghosh,Sudipta Bhattacharjee,D. Deb,Samir K.Pal 한국암반공학회 2010 한국암반공학회 학술대회 및 세미나 자료집 Vol.2010 No.10
Characterization of engineering materials is an essential aspect of manufacturing, since the properties of both the job and the tool influence each other. Experimental work is conducted to detect acoustic, vibration and electromagnetic emissions produced during uniaxial compressive loading of rock specimens. Preliminary results of testing limestone, quartz and sandstone rock specimens are presented. Some results of testing granite and coal samples are also presented. Results indicate that different types of AE, vibration and EM signals are produced during testing of a rock type to failure. In rock drilling one of the main consumables is the cutting tool. The performance of the cutting tool and its life is also controlled by the properties of the job (rock). The present work aims at characterization of rock material based on the physical and mechanical properties, as well as the levels of acoustic emissions and electromagnetic emission under uni-axial compression with the help of appropriate sensors and instrumentation.