In Situ Preparation of a Compatibilized Poly(cis-1,4-butadiene)/Poly(-caprolactone) Blend
| Autor: | Oskar Nuyken, Heike Windisch, Werner Obrecht, Lars Friebe |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Materials science
Polymers and Plastics General Chemical Engineering Organic Chemistry Compatibilization Ring-opening polymerization chemistry.chemical_compound Polybutadiene chemistry Polymerization Ethylaluminium sesquichloride Polymer chemistry Materials Chemistry Copolymer Polymer blend Caprolactone |
| Zdroj: | Macromolecular Materials and Engineering. 288:484-494 |
| ISSN: | 1439-2054 1438-7492 |
| DOI: | 10.1002/mame.200390045 |
| Popis: | The ternary Ziegler-Natta-type catalyst system based on neodymium versatate (NdV), diisobutylaluminium hydride (DIBAH) and ethylaluminium sesquichloride (EASC) was used for in the situ preparation of a comptabilized blend consisting of poly(cis-1,4-butadiene) (BR=butadiene rubber) and poly(e-caprolactone) (PCL). Poly(cis-1,4-butadiene)-block-poly(e-caprolactone) which acts as comptabilizer for the two immiscible polymers BR and PCL was obtained by a two step sequential polymerization with the preparation of a living cis-1,4-BR building block in the first stage and the subsequent polymerization of CL during the second stage. This preparation method resulted in a polymer blend comprising the homopolymers BR and PCL as well as the block copolymer BR-block-PCL. For detailed characterization the block copolymer was separated from the respective homopolymers BR and PCL by means of fractionation with the binary solvent mixture dimethylformamide/methylcyclohexane (DMF/MCH) which mixes well at elevated temperature and exhibits phase separation at ambient temperature. 1 H NMR, IR, SEC and TEM were used for characterization of the block copolymer. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text