Low-molecular-weight stat-poly(ethylene oxide-co-propylene oxide) copolymers have been prepared by anionic way using a new heterogeneous catalytic process. After checking the reactivity ratios of the system, the new resonance peaks due to low-molecular-weight chains (end groups) have been assigned and the copolymers were fully characterized by 13C-NMR in terms of triads centered in ethylene oxide units. Finally, signal areas have been successfully compared with computer simulation based on the Monte Carlo method, taking into account the chain length distribution resulting from anionic polymerization.
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Llauro et al. (1995) studied this question.
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