Journal of the Rubber Research Institute of Sri Lanka
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Item A linear gel/polymer system based on radiation prevulcanized natural rubber latex(Rubber Research Institute. Agalawatte, 1985) Karunaratne, S.W.; Fernando, W.S.E.Item Research and the improvement of tyre performance(Rubber Research institute of Sri Lanka. Agalawaththa, 1974) Cunneen, J.I.Item Evaluation of some indigenous minerals as fillers for the rubber industry(Rubber Research Institute Sri Lanka. Agalawaththa, 1981) Fernando, W.S.E.; Jayasinghe, P.P.Item Effect of varied carbon black distribution on the morphology and properties of blends of natural and nitrile rubber(Rubber Research Institute. Agalawatta, 2003) Edirisinghe, D.; Freakley, P.K.Item Quality improvement of radiation vulcanized natural rubber latex by addition of polyvinyl alcohol and centrifugation(Rubber Research Institute. Agalawatta, 1999) Ratnayake, U.; Makuuchi, K.; Yoshii, F.Effect of polyvinyl alcohol(PVA)on extractable soluble protein content,and on mechanical and physical properties of radiation vulcanized natural rubber latex(RVNRL)was studied with the view of improving properties of RVNR latex.Concentrated natural rubber latex was irradiated at the rate of 10 kgy/h for 2hrs in the presence of 5 phr of n-BA and 0.5 phr of KOH.PVA solution was added to the RVNR latex at three different stages and different time periods were used for leaching to find out the most suitable process to produce soluble protein less RVNR latex.present results indicate that combined treatments of PLVA addition and centrifugation foollowed by leaching were more effective compared to single treatmemt to reduce soluble protein content in RVNR latex films.It could be further observed that,the tear strength was increased whereas tensile strength and tackiness were decreased with PVA concentration.However when the PVA incorporated RVNRL was centrifuged,tensile and tear strenght were not changed up to 2 phr of PVA.Fourier Transrorm infrared slpectrophotometer (FTIR)measurements showed that whem PVA added RVNRL was centrifuged,most of the PVA could be removed with the serum phase,According to the Horixontal Attenuated Total reflectance(HATR)measurements ,PVA concentration on the upper and lower surfaces of the latex films (I.E.the exposed and unexposed surfaces of the films whem drying )was not equal.Item Improving phase morphology and properties of NR/NBR blends with compatibilizers(Rubber Research Institute. Agalawatta, 1998) De Silva, K.G.K.; Lewan, M.Two compatibilizing agent have been identified for NR/NBR blend to improve the phase morphology and interfaial adhesion, thereby improving the physical and technological properties. Light and optical microscopy and Nuclear Magnetic Resonance have been used to study the phase contrast and crosslink distribution of the elastomer blends respectively, to suport the observations mode on the improvements in the physical properties of these blends.Item Method of purifying waste engine oil and studies on black loaded natural rubber mixes containing this ingredient(Rubber Research Institute. Agalawatta, 1978) Amarapathy, A.M.A.; Samarawickrama, L.N.This paper deals with the investigation of the suitability of pretreated waste engine oil for use as a processinig oil in rubber compouning. Technoloical propertie an cure characteristics of mixes containing puriied waste oil were found to be omparable to thoe containing similar dosages of well known commercial processing oils.