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Feasibility Study on Continuous Flow Controlled/Living Anionic Polymerization Processes
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DOI：10.1021/acs.oprd.6b00158.png)
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Abstract
En 中文
A practical microchemical reaction system for keeping process flow at defined conditions, which is one of the key issues of industrial production, was developed. Controlled/living anionic polymerization was chosen as a test reaction because the molecular weight and molecular weight distribution of polymer products are quite sensitive to the relative flow rate of an initiator solution and that of a monomer solution. The polymerization of styrene in THF/hexane was carried out using a flow microreactor system consisting of two T-shaped rnicromixers and two microtube reactors using Smooth flow pumps at 0 degrees C. Poly(styrene) with higher molecular weight such as Mn > 10000 could be synthesized using s-BuLi (Mn = 14000, M-w/M-n = 1.11). n-BuLi could also be used as an initiator. The continuous operation was performed for 3 h without any problems to obtain ca. 1 kg of the polymer, indicating the feasibility of continuous flow processes for controlled/living anionic polymerization on a relatively large scale.
Keywords:
CONTINUOUS TUBULAR REACTOR
ORGANIC-SYNTHESIS
BLOCK-COPOLYMERS
MICROSTRUCTURED REACTORS
MICROFLUIDIC REACTOR
MICROREACTOR SYSTEM
CHEMICAL-REACTIONS
VINYL ETHERS
CHEMISTRY
TECHNOLOGY
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