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Sehgal, B.
- Modified Rubber via Grafting of Polymer on Olefinic Site
Abstract Views :211 |
PDF Views:0
Authors
B. Sehgal
1,
G. B. Kunde
2
Affiliations
1 Dept. of Applied Chemistry, Maharaja Sayajirao University of Baroda, Vadodara-390001, Gujarat, IN
2 Dept. of Applied Chemistry, Datta Meghe College of Engineering, Navi-Mumbai, Maharashtra, IN
1 Dept. of Applied Chemistry, Maharaja Sayajirao University of Baroda, Vadodara-390001, Gujarat, IN
2 Dept. of Applied Chemistry, Datta Meghe College of Engineering, Navi-Mumbai, Maharashtra, IN
Source
Research Journal of Science and Technology, Vol 2, No 5 (2010), Pagination: 98-101Abstract
Natural rubber (NR) is a very reactive rubber because of its structure. The modification of NR with other functional groups can be achieved by incorporation of monomer carrying the desired functional group in the polymerization process using ene reaction. Grafting of a second polymer on to the natural rubber backbone leading to the chemical modification of the polyisoprene occurs at allylic double bond system. This route following grafting gave good control over the extent of reaction as the reaction limits itself on individual olefinic sites present on rubber and does not employ a catalyst that gets poisoned by non rubbers. With the help of ene reaction not only the molecular wt of the polymer that underwent grafting can be accurately determined but the no of grafting sites can also be controlled. Azo compounds have been used as effective modifiers of NR as they have long-term stability and have fewer tendencies to decompose to free radicals.- Grafting Enhances the Thermal Stability of Thermoplastic Elastomers
Abstract Views :226 |
PDF Views:1
Authors
B. Sehgal
1,
G. B. Kunde
2
Affiliations
1 Dept. of Applied Chemistry, Maharaja Sayajirao University of Baroda, Vadodara-390001, Gujarat, IN
2 Dept. of Applied Chemistry, Datta Meghe College of Engineering, Navi-Mumbai, Maharashtra, IN
1 Dept. of Applied Chemistry, Maharaja Sayajirao University of Baroda, Vadodara-390001, Gujarat, IN
2 Dept. of Applied Chemistry, Datta Meghe College of Engineering, Navi-Mumbai, Maharashtra, IN
Source
Research Journal of Engineering and Technology, Vol 1, No 2 (2010), Pagination: 65-69Abstract
The type of interactions that take place between a polymer and its degradation products and also the changes that occur on addition of a second polymer in the same environment as in the case of polymer blends or graft copolymers, has been examined in the present study. Some pair of polymers shows no evidence of interaction during the degradation of a blend whereas in some cases it has been found that the presence of degradation product from one polymer can highly influence the degradation behavior of the other polymer.- Oxidative Stability of Biodiesel Using Tea Leaves
Abstract Views :163 |
PDF Views:0
Authors
B. Sehgal
1,
G. B. Kunde
2
Affiliations
1 Department of Applied Chemistry, Maharaja Sayajirao University of Baroda, Vadodara-390001, Gujarat, IN
2 Datta Meghe College of Engineering, Dept. of Applied Chemistry, Navi Mumbai, Maharashtra, IN
1 Department of Applied Chemistry, Maharaja Sayajirao University of Baroda, Vadodara-390001, Gujarat, IN
2 Datta Meghe College of Engineering, Dept. of Applied Chemistry, Navi Mumbai, Maharashtra, IN
Source
Asian Journal of Research in Chemistry, Vol 3, No 3 (2010), Pagination: 620-622Abstract
A comparative study of oxidation stability of biodiesel prepared via transesterification and sonication routes was carried out. The polyphenols from tea extract, while acting as an antioxidant could prolong the onset of degradation by about two weeks. Difference in viscosity and peroxide value were used as an indicator of oxidation. Though the polyphenols could not prevent a viscosity increase that corresponds to the beginning of rapid polymerisation but the rate of the increase was quiet slow. Polyphenols from tea extract stabilizes the methyl ester by reducing the rate of peroxide formation and by stabilising the viscosity. A sudden rise of viscosity was attributed to onset of secondary oxidation marked by an increased release of free fatty acid. The onset of secondary oxidation showed a marked delay in ultrasonicated samples as compared to transesterification.Keywords
Transesterification, Sonication, Peroxide Value, Antioxidant.- Structure Property Relationship of Polymer Blends:Effect of Grafting on Mechanical Properties
Abstract Views :173 |
PDF Views:0
Authors
B. Sehgal
1,
G. B. Kunde
2
Affiliations
1 Maharaja Sayajirao University of Baroda, Department of Applied Chemistry, Vadodara-390001, Gujarat, IN
2 Datta Meghe College of Engineering, Dept. of Applied Chemistry, Navi Mumbai, Maharashtra, IN
1 Maharaja Sayajirao University of Baroda, Department of Applied Chemistry, Vadodara-390001, Gujarat, IN
2 Datta Meghe College of Engineering, Dept. of Applied Chemistry, Navi Mumbai, Maharashtra, IN
Source
Asian Journal of Research in Chemistry, Vol 3, No 3 (2010), Pagination: 637-639Abstract
The behavior of polymer blend depends on the properties of the individual components in the blend, the proportion in which they are present in blend and the structure and morphology of the blend. The structure of the dissolved molecules of the blend in the polymer-polymer mixture plays a major role in the molecular state of dispersion, the adhesion between the phases and consequently influences most of the properties and applications. In the present study we have made use of grafting of a polymer on to the natural rubber backbone leading to chemical modification of the poly-isoprene allylic double bond system. This type of modification leads to a change, not only in chemical properties but physical properties as well, like increased hardness, strength with decreased tackiness and the blend behaves like a thermoplastic rubber without making use of vulcanization. In order to optimize the processing conditions, the properties like miscibility characteristics, torque and melt viscosity were studied.Keywords
PVC (Poly Vinyl Chloride), NR (Natural Rubber) ENR (Epoxidised Natural Rubber), PMMA (Polymethyl Methacrylate).- Awareness of Waterborne Diseases and Water Purification Practices at Household Level
Abstract Views :479 |
PDF Views:0
Authors
Affiliations
1 College ofHome Seienee, CCSHAU, Hisar, Haryana, IN
1 College ofHome Seienee, CCSHAU, Hisar, Haryana, IN
Source
Indian Journal of Health and Wellbeing, Vol 9, No 4 (2018), Pagination: 580-583Abstract
Water purification is the process of*removing undesirable chemicals, biological contaminants, suspended solids and gases from contaminated water with the aim of making it fit for drinking or a specific purpose. Drinking water is an absolute necessity. Consumption of unsafe drinking water contributes to the 4 million annual cases of diarrhoeal cases worldwide. This study aimed to determine the knowledge and applicability of water purification practices and awareness of various water bom diseases by the homemakers at Hisar city of Haryana state A total of 100 respondents from a corresponding number of households were selected through a multistage sampling method. Data was obtained with the use of well structured interviewer administered questionnaire. It was found from the study that boiling technique of purification was known to cent percent of the respondents from sector area and old city area. While use of filters, phitkari, (Alum), muslin doth, potassium permanganate, chlorine tablet, etc. were aware by them but in some less percentage. More than % percentage of women were using water filters in their home and out of them majority of women were using candle filters .A huge percentage of respondents were aware that impurities of water means dirt, dust, insects, bacteria and viruses in that. The basic reason given by them for using filters was it removes insect, remove dirt and dust etc. A little less than one-third percent of the respondents were aware that filters can remove odour and colour also. Those who were not using filters were saying that filtration is a long process and immunity does not improve, dean water availability in their locality, the basic reasons.70-80 percent of the respondents were aware about thejaundice, dysentery, diarrhoea were caused by intake of impure drinking water. Hence the study emphasize a general look of Indian women of a small city about water purification practices and diseases caused.Keywords
Household Drinking Water, Purification Practices, Knowledge, Quality.References
- Bhattacharya, S.S. (2013). Role of nanotechnology in water treatment and purification: Potential application and implication. International Journal of Chemical Science and Technology 3(3)^ 59-64.
- Taneja, M. (1986). A study on various practices of homemaker and bacteriological quality of drinking -water stored in the vessels ofdifferent materials. M.Sc. Thesis, CCS Haryana Agricultural University, Hisar.
- Taneja, A. (1994). Impact of household sanitation technologies onfarming living rural households. M.Sc. Thesis, CCS Haryana AgriculturalUniversity, Hisar.
- WHO (2007). Combating -waterborne disease at the household level. The International Network to Promote Household Water Treatment and Storage. Geneva. [Cited 2015 Mar 18] Available from:http://www.who.int/water_sanitation_health/mdgl/en/print. html.