Search Result of "Satit Rodphukdeekul"

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effects of Smoking on Lipid Content, Macromolecular Structure and Rheological Properties of Hevea brasiliensis Sheet Rubber)

ผู้เขียน:ImgSatit Rodphukdeekul, Imgศิริลักษณ์ เลี้ยงประยูร, Imgนางสาววิไล สันติโสภาศรี, ผู้ช่วยศาสตราจารย์, Imgดร.กล้าณรงค์ ศรีรอต, รองศาสตราจารย์, ImgFrederic Bonfils, ImgEric Dubreucq, ImgLaurent Vaysse



Natural rubber ribbed smoked sheet (RSS) production process involves a drying step in a wood smoke dryer. The purpose of this work was to know whether this smoke drying step affected the lipid composition and the properties of sheet rubber. This study consisted of a comparative study between unsmoked sheets (USS) and ribbed smoked sheets (RSS) obtained from monoclonal latices from RRIM600, BPM24 and PB235 clones. The rubber was sampled in Chantaburi province, Thailand. It was found that the smoking process increased significantly the amount of lipid extract but decreased significantly the free fatty acid content. No significant effect of smoking was detected on macromolecular parameters such as gel content or molar mass distribution and on rheological parameters such as initial plasticity (P0) and Mooney viscosity (ML(1+4)100). In terms of resistance to thermal oxydation estimated by Plasticity retention index (PRI), smoked sheets displayed a tendency to have lower PRI than unsmoked sheets. This difference was significant for PB235 clone. A clonal effect was detected for most of the measured parameters. Indeed, PB235 clone displayed a higher lipid extract, higher P0, higher ML(1+4)100, higher molar mass than those of the other studied clones while its PRI was lower.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 042, Issue 2, Apr 08 - Jun 08, Page 306 - 314 |  PDF |  Page