Anionic Polymerization of Isoprene. I. Polymerization of Isoprene by Oligomeric Dilithium Initiator

Block Copolymers of Styrene, Isoprene, and Ethylene Synthesis and Characterization Oxide Prepared by Anionic Polymerization. I

Anionic polymerization has been used as a technique for the synthesis of five-block copolymers of polystyrene (PS), polyisoprene (PI), and poly(ethy1ene oxide) (PEO). Two types of such polymers, PEO-PI-PS-PI-PEO and PEO-PS-PI-PS-PEO with varying PEO block length, have been prepared, using potassium naphthalene as the initiator and tetrahydrofuran as the solvent. The polymers were purified by ex...

Polymerization of Isoprene by Using Benzyl Diethyldithiocarbamate as an Iniferter

The polymerization of isoprene through the use of benzyl N,N-diethyldithiocarbamate (BDC) as an iniferter was investigated. The monomer concentration used was kept constant at 2.8 mol/L while the BDC concentration was varied. The polymer product was characterized by Fourier Transform Infrared Spectroscopy (FTIR), Proton Magnetic Resonance (H-NMR), and Differential Scanning Calorimetry (DSC) and...

Highly trans-stereospecific Isoprene Polymerization by Neodymium Borohydrido Catalysts

Iron-catalyzed polymerization of isoprene and other 1,3-dienes.

Synthesis of Polyamide 6 by Anionic Polymerization of ε-Caprolactam in an Internal Mixer: Effect of Polymerization Reaction Time

The main objective of the present work was to synthesis polyamide 6 through anionic polymerization of ε-caprolactam in an internal mixer. The reaction time and the rheological properties of samples during the polymerization were studied. The samples were characterized by Thermo Gravimetry Analysis (TGA), Differential Scanning Calorimeter (DSC) and FT-IR spectrometer. The melt flow behavior and ...