Polyblends ofPoly(vinyl alcohol) and POIY(E-caprolactone) and Their Properties


The increasing volume of plastic has caused the serious problem in environment. One way to solve this
problem is preparation of new plastic materials which can be decomposed by microorganisms in environment. These
plastics may be prepared from non-biodegradable material by modification of theirs physical and chemical properties,
preparation of theirs copolymers and polyblends. The main problem in preparation of polyblends is compatibility
between polymers mixtures. In this work has focused on preparation of polyblends between poly(vinyl alcohol) (PYA)
and poly(e-caprolactone) (PCL) in various compositions by casting of polymers solution. Characterizations of
polyblends were carried out by analysis of functional groups (FTIR), thermal property (DSC and TGAlDTA),
mechanical properties (Tensile tester), and crystallinity (XRD). The results of polyblends showed that the compatible
and homogeneous polyblends were obtained in solvent composition (dimethyl sulfoxide / tetrahydrofurane)
(DMSOffHF) of 3:I and PCL ratio in polyblends less than 15% (w/w). The absorption intensity of carbonyl and alkyl
groups observed in 1725 cm-l and 2940 cm-1 increased with increasing PCL composition in polyblends. The melting
point (Tm) and fusion enthalpy (MIm) for PCL region in polyblends decreased with decreasing PCL composition, but
melting point (Tm) and fusion of enthalpy (MIm) for PYA region increased. The total fusion enthalpy value obtained by
observation was smaller than that of calculation value, indicating the presence of interaction between PCL and PYA to
form a part of compatible polyblends with more amorphous structure. The mechanical properties of polyblends tended to
decrease with increasing PCL ratio in polyblends. These results were supported by analysis of crystallinity with using Xray
Keywords: Poly(vinyl alcohol), poly(e-caproplactone), polyblends, and compatibility.I M. Arcana and L. Alia
Inorganic and Physical Chemistry Research Groups, Faculty of Mathematic and Natural Sciences,
Institut Teknologi Bandung, Indonesia