Now showing items 81-88 of 88
Abstract: | ABSTRACT: p-Phenylenediamine was chemically attached to low molecular weight chlorinated paraffin wax. The polymer-bound p-phenylenediamine was characterized by vapor-phase osmometry (VPO), proton magnetic resonance spectroscopy ('H-NMR), infrared spectroscopy (IR), and thermogravimetric analysis (TGA). The efficiency and permanence of the polymer-bound p-phenylenediamine as an antioxidant was compared with a conventional amine-type antioxidant in natural rubber vulcanizates. The vulcanizates showed improved aging resistance in comparison to vulcanizates containing a conventional antioxidant. The presence of liquid polymer-bound p-phenylenediamine also reduces the amount of the plasticizer required for compounding. |
URI: | http://dyuthi.cusat.ac.in/purl/861 |
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P B Sulekha and ... zation of..Nov.2001PDF.PDF | (4.151Mb) |
Abstract: | Tribasic lead sulphate is tried as a practical curing agent for polychloroprene. The cure characteristics of the compounds as well as the technical properties of the vulcanizates show that it can act as a potential curative. |
URI: | http://dyuthi.cusat.ac.in/purl/840 |
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Rani Joseph and others,Tribasic lead..1986.PDF | (3.857Mb) |
Abstract: | Amine Terminated Liquid Natural Rubber (ATNR) was used as a plasticiser in filled NR and NBR compounds replacing oil/DOP. The scorch time and cure time were found to be lowered when ATNR was used as the plasticiser. ATNR was found to improve the mechanical properties like tensile strength, tear strength and modulus of the vulcanizates . The ageing resistance of the vulcanizates containing ATNR was superior compared to the vulcanizates containing oil/DOP. |
URI: | http://dyuthi.cusat.ac.in/purl/832 |
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R Srilathakutty and others,Use of amine..,1996.PDF | (5.714Mb) |
Abstract: | Carboxy Terminated Liquid Natural Rubber (CTNR) was prepared by photochemical reaction using maleic anhydride and masticated natural rubber (NR). The use of CTNR as an adhesive in bonding rubber to rubber and rubber to metal was studied. The peel strengths and lap shear strengths of the adherends which were bonded using CTNR were determined. The effect of using a tri isocyanate with CTNR in rubber to metal bonding was also studied. It is found that CTNR can effectively be used in bonding rubber to rubber and rubber to mild steel. |
URI: | http://dyuthi.cusat.ac.in/purl/851 |
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Dileep U and others,the use of carboxy...,2003.PDF | (4.545Mb) |
Abstract: | Butyl (IIR) tube reclaim (RR) was mixed with carbon black filled natural rubber (NR) compounds at various percentages. The blend containing a low percentage of RR was found to show improved ageing resistance and improved processability with out much reduction in the mechanical properties. |
URI: | http://dyuthi.cusat.ac.in/purl/830 |
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N Suma and Rani ... lization of IIR..,1992.PDF | (4.222Mb) |
Abstract: | Scrap latex products contain rubber hydrocarbon of very high quality, that is only slightly crosslinked. A novel economic technique for converting such latex waste into a processible material is developed. This paper reports the effect of adding this latex reclaim to natural rubber. It is shown that latex reclaim can replace raw natural rubber up to about 50 wt.% without affecting mechanical properties. |
URI: | http://dyuthi.cusat.ac.in/purl/843 |
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Reena Susan George and Rani Joseph,1993.PDF | (4.752Mb) |
Abstract: | Waste latex products are converted to a processabto material by a novel economical process developed in our laboratory , It contains rubber hydrocarbon of very high quality and Is lightly cross -linked. Styrene-butadlene rubber is mixed with latex reclaim In different proportions . The mechanical properties are found to be improved up to 60 percent replacement of styrene-butadlene rubber by latex reclaim . The curing of styrene-butadiene rubber Is found to be accelerated by the addition of latex reclaim. The processablllty study shows that the blends can be processed similar to SBRINR blends. |
URI: | http://dyuthi.cusat.ac.in/purl/845 |
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Reena Susan Geo ... ,The utilization..1996.PDF | (3.936Mb) |
Abstract: | ABSTRACT: Zinc salts of ethyl, isopropyl, and butyl xanthates were prepared in the laboratory. They were purified by reprecipitation and were characterized by IR, NMR, and thermogravimetric analysis techniques. The melting points were also determined. The rubber compounds with different xanthate accelerators were cured at temperatures from 30 to 150°C. The sheets were molded and properties such as tensile strength, tear strength, crosslink density, elongation at break, and modulus at 300% elongation were evaluated. The properties showed that all three xanthate accelerators are effective for room temperature curing. |
URI: | http://dyuthi.cusat.ac.in/purl/870 |
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Shiny Palaty an ... ccelerators..March2000.PDF | (4.150Mb) |
Now showing items 81-88 of 88
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