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Polycaprolactone-graft-glycidyl methacrylate (PCL-g-GMA) copolymer was prepared by grafting GMA onto PCL in a batch mixer using benzoyl peroxide as an initiator. The graft content was determined with the 1 H-NMR spectroscopy by calculating the relative area of the characteristic peaks of PCL and GMA. The graft content increased with the increase of GMA concentration. The methine proton peak...
Thermal and mechanical properties of ethylene/α-olefin copolymers (LLDPE) produced over bis(2-methyl indenyl)zirconium dichloride((2-MeInd)2ZrCl2) were compared with those of LLDPEs synthesized with a conventional heterogeneous Ziegler–Natta (Z–N) catalyst, titanium tetrachloride supported on magnesium diethoxide with diisobutyl phthalate as an internal donor(Mg(OEt)2/DIBP/TiCl4). DSC thermogram of...
Low density polyethylene (LDPE) and high density polyethylene (HDPE) were plasma-treated with N 2 and O 2 plasma. The wettability and polar component of surface free energy of plasma-treated polyethylene were investigated by contact angle measurement. The concentration of functional groups formed by plasma treatment such as hydroxyl and carbonyl groups was measured using attenuated...
A Co(II) chelate membrane from a poly(vinyl alcohol)/poly(allyl amine) blend was synthesized. As an intermediate step the blend membrane was modified to a Schiff-base type. Structures of blend and Schiff-base membrane were confirmed by the FTi.r. subtraction method. Differential scanning calorimetry thermograms of blend and Schiff-base membranes showed that the glass transition temperature (T ...
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