Browsing by Author "Karunanayake, L."
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Item Blends of acrylonitrile butadiene rubber/superior processing/natural rubber and poly(vinyl chloride) Part I. a study of some of the technological properties of NBR/SP rubber/NR/PVC blends(Rubber Research Institute. Agalawatta, 1999) De Silva, K.G.K.; Karunanayake, L.; Muttukkrishnan, K.The advantage s of using superior processing(SP)rubber in place of natural rubber (NR) in blends with NBR and NBR/PVC is discussed here in derail.various technological properties such as tensile,resilience,hardness,compression set,specific gravity,cross-lind density and resistance to oil were measured and compared. It is advantageous to use SP rubber in place of NR in the above blends probably due to higher cross-link density in the SP rubber component when compared to NR. It may be possible to use the ternary blends of SP/PVC? NBR in manufacture of injection moldable and recyclable products due to their thermoplastic natureItem Characteristics of Natural Cellulose Fibres Extracted from Sri Lankan Rice Straw Varieties(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2020-06) Ratnakumar, A.; Samarasekara, A.M.P.B.; Amarasinghe, D.A.S.; Karunanayake, L.Item Effect of ethephon stimulation on natural rubber latex properties; new insight into ethephon stimulation(NSF:Colombo, 2018-06) Attanayake, A.P.; Karunanayake, L.; Nilmini, A.H.R.L.Item Effect of incorporation of peanut and sesame oils and their epoxides on the structure of poly vinyl chloride(NSF:Colombo, 2006) Karunanayake, L.; Fernando, P.N.J.Item The effects of glass powder on some mechanical properties of engineering thermoplastics(National Science Foundation:Colombo, 2007-3) Karunanayake, L.Item Enteric fever caused by salmonella isolates with decreased susceptibility to ciprofloxacin(Elsevier. New Delhi, 2004) Karunanayake, L.; Atukorala, S.D.Item Epoxidation of some vegetable oils and their hydrolysed products with peroxyformic acid - optimised to industrial scale(National Science Foundation:Colombo, 2009) Gamage, P.K.; O'Brien, M.; Karunanayake, L.Item Epoxidation of some vegetable oils and their hydrolysed products with peroxyformic acid -optimised to industrial scale(National Science Foundation:Colombo, 2009-12) Gamage, P.K.; O'Brien, M.; Karunanayake, L.Item Epoxidized vegetable oils as processing aids and activators in carbon-black filled natural rubber compounds(NSF. Colombo, 2011) Chandrasekara, G.; Mahanama, M.K.; Edirisinghe, D.G.; Karunanayake, L.Item Extraction and characterization of bio-based polymeric materials from traditional rice varieties in Sri Lanka(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2019-01) Pabasara, W.G.A.; Nanayakkara, M.P.A.; Samarasekara, A.M.P.B.; Amarasinghe, D.A.S.; Karunanayake, L.Item Fetal meningitis in a child due to a multi-drug resistant Streptococcus pneumoniae(The Sri Lanka Medical Association. Colombo, 2007) Karunanayake, L.; Bandara, D.; Dunusinghe, P.Item Formaldehyde based resins prepared using tannin obtained from bark of Terminalia arjuna (Roxb.)(2006) Arasaretnam, S.; Karunanayake, L.; Manoharan, P.Item Insight into prevention of enzymatic browning and increase of antioxidant potential of crepe rubber with ethephon stimulation(Rubber Research Institute:Agalawatta, 2015) Attanayake, A.P.; Karunanayake, L.; Nilmini, A.H.R.L.Item Investigation of mechanical properties of nanocellulose reinforced synthetic polymer composite(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2019-01) Kahawita, K.D.H.N.; Samarasekara, A.M.P.B.; Amarasinghe, D.A.S.; Karunanayake, L.Item Investigation of the potential to fabricate a conductive sensor based on fluorescence properties of polyurethane(2015) Pathmakumari, M.V.I.; Senevirathne, S.; Karunanayake, L.; Karunaratne, V.; Amarasinghe, S.Item Kinetics of degradation of PVC-containing novel neem oil as stabilizer(2009) Gamage, P.K.; Farid, A.S.; Karunanayake, L.Item Leptospirosis: challenges in diagnosis, and predictors of severity(Ceylon College of Physicians:Rajagiriya, 2016) Rajapakse, S.; Fernando, N.; Niloofa, M.J.R.; De Silva, H.J.; Karunanayake, L.; Premawansa, S.; Handunnetti, S.M.Item Magnesium content in natural rubber latex(Rubber Research Institute of Sri Lanka. Agalawatta, 1998) Karunanayake, L.; Sarath Kumara, P.H.; Nandasena, W.W.; Wanigatunga, L.; Gamage, V.; Lokuge, C.Measurements and control of magnesium content in natural rubber latex is very important in centryfuged latex industry as the Mg content affects the stability of latex, very significantly. In this study, an investigation was carried out to find the effect of seasonal and regional variations in Mg content of natural rubber latex. A titration method was used to estimate the Mg content in latices. The Mg content of NR latex was found to be dependent on seasonal variationsItem Microcrystalline Cellulose as Reinforcing Agents for Polypropylene Composites(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2020-06) Ratnakumar, A.; Rathnayake, W.S.M.; Karunanayake, L.; Samarasekara, A.M.P.B.; Amarasinghe, D.A.S.Item Optochin-resistant Streptococcus pneumoniae(Sri Lanka Medical Association. Colombo, 2011) Karunanayake, L.; Tennakoon, C.