Synthesis, characterization and properties of the new unsaturated polyester resins for composite applications
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Date
2007
Authors
Mohammad, Noorshashillawati Azura
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Abstract
Currently the unsaturated polyester resin is an important matrix resins for
thermosetting polymer composites. Major objectives of this study were to
synthesis and characterize new unsaturated polyester resins for composite
applications. Two types of new unsaturated polyester resins were synthesized
based on Bis-(2-hydroxyethyl) fumarate (I) and Bis-(6-hydroxyhexyl) fumarate
(II). Bis-(2-hydroxyethyl) fumarate (I) and Bis-(6-hydroxyhexyl) fumarate (II)
were synthesized from ethylene glycol and 1, 6-hexanediol with fumaric acid in
the presence of p-toluene sulfonic acid as catalyst. The chemical structures
were confirmed by CHN analyses, FT-IR and 1H-NMR spectroscopy. New
unsaturated polyesters were carried out by the condensation reaction between
terepthaloyl chloride and the monomer I and II. The chemical structures of this
polymer were confirmed by CHN analyses, FT-IR, 1H-NMR, thermogravimetric
analysis (TGA) and differential scanning calorimetry (DSC). New oil palm empty
fruit bunches (OPEFB) reinforced polyester composite derived from the new
unsaturated polyester resins containing bis-(2-hydroxyethyl) fumarate and bis-
(6-hydroxyhexyl) fumarate were prepared. The mechanical and physical
properties such as tensile, flexural, impact properties and water absorption of
OPEFB reinforced polyester composite were also studied. In general, the
results showed that the new polyester reinforced OPEFB composite exhibits
highest mechanical properties as compared to commercial polyester reinforced
OPEFB composites.
Description
Master
Keywords
Science , unsaturated polyester , resins , composite applications