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Effect of Metal Ions on Quality of Natural Rubber
U N Ratnayake - ไม่ระบุหน่วยงาน
ชื่อเรื่อง (EN): Effect of Metal Ions on Quality of Natural Rubber
ผู้แต่ง / หัวหน้าโครงการ (EN): U N Ratnayake
บทคัดย่อ (EN): Latex crepe rubber is the purest form of natural rubber which is graded by visual appearance. Crepe rubber can easily be contaminated with metal ions from the processing water and from processing chemicals. The effect of metal ions such as iron (Fe) and copper (Cu) on quality of crepe rubber properties was investigated. Latex crepe rubber (i.e. fractionated bleached; FB and fractionated unbleached; FUB) were prepared by incorporating different concentrations of metal ions into the processing water. Atomic absorption spectrophotometric (AAS) analysis of crepe rubber showed that retention of metal ions was significant in the crepe rubber despite through washing with good quality water during the milling process. The concentration of retained metal ions in the crepe rubber has a significant impact on raw rubber properties, particularly on the colour and on resistance to oxidative degradation. Plasticity retention index (PRI) measurements showed that oxidative degradation is significantly accelerated when crepe rubber is manufactured using water contaminated with above metal ions. However, the effect of Cu ions on degradation of crepe rubber is more severe in comparison to Fe ions. The results have been interpreted with reference to the retained metal ion concentration in bleached and unbleached crepe rubber. The maximum allowable limits of metal ions (i.e. Fe and Cu) in crepe rubber are proposed.
บทคัดย่อ: ไม่พบข้อมูลจากหน่วยงานต้นทาง
ภาษา (EN): en
เผยแพร่โดย (EN): การยางแห่งประเทศไทย
คำสำคัญ (EN): metal ion
เจ้าของลิขสิทธิ์ (EN): การยางแห่งประเทศไทย
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Effect of Metal Ions on Quality of Natural Rubber
U N Ratnayake
การยางแห่งประเทศไทย
ไม่ระบุวันที่เผยแพร่
Advances on biodiversity of natural rubber biosynthesis and regulations on natural rubber biosynthesis Technological and processing properties of natural rubber layered silicate-nanocomposites by melt intercalation process Addressing the Fears of the Natural Rubber Supply Chain Regarding the Dissemination of Genetically Modified Rubber Trees The Role of Myanmar Rubber Planters and Producers Association (MRPPA) in Natural Rubber Development and its Recent Activities Rubber Farmer Producer Company – Succour in Time of Stress for Rubber Industry POTENTIAL OF INCREASING THE PLANTING DENSITY OF RUBBER IN SRI LANKA STUDY ON THE POTENCY OF SERRATIA BACTERIA USED TO CONTROL WHITE ROOT DISEASE IN RUBBER Bentonite Modification by Combination of Physical and Chemical Process as Fillers of Natural Rubber/Organobentonite Nanocomposite STUDY ON THE EFFECT OF POLAR ORGANIC SOLVENT ON REMOVE PROTEIN FROM NATURAL RUBBER FEASIBILITY OF RUBBER (Hevea brasiliensis Mull. Arg.) CULTIVATION IN THE EASTERN PROVINCE OF SRI LANKA; A NON TRADITIONAL AREA FOR RUBBER
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