A Simple Method for Synthesizing Ultra-high-molecular-weight Polystyrene through Emulsion Polymerization Using Alkyl-9-BBN as an Initiator
Styrene emulsion polymerization using an alkyl-9-BBN, synthesized by reacting 9-BBN (9-borabicyclo-[3.3.1]-nonane) and styrene, in an aqueous sodium dodecyl sulfate (SDS) solution was studied. Ultra-high-molecular-weight (> 1.0 × 107) polystyrene was synthesized using a radical initiator formed through the aerobic oxidation of this alkyl-9-BBN in a high yield (> 80%). The kinetics of this emulsion polymerization of styrene with the alkyl-9-BBN was investigated. We confirmed that in the initial stage of the polymerization, the initial reaction rate followed first-order kinetics. The activation energy for this emulsion polymerization of styrene was approximately 56.2 kJ/mol.
KeywordsEmulsion polymerization 9-BBN Ultra-high molecular weight polystyrene
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