Facile Synthesis of Functionalized High Vinyl Polybutadiene by Using 1,2-Dipiperidinoethane Derivatives as Polar Modifier

Abstract

Polydiene-basedliquid rubber can be used to prepare high frequency copper-clad plates, and is also the most critical raw material for photosensitive elastomers for flexible resin plates. The molecular structure control requirements of high-performance liquid rubber are very high, and special living anionic initiation systems and polymerization processes need to be found to achieve stable control of product structure. In this paper, a series of novel polar modifiers were synthesized by introducing alkyl substituents and N/O-containing heteroatoms into the cycloamine ring (1,2-dipiperidinoethane (DPE) derivatives), and the high vinyl polybutadiene (90% < 1,2-units < 99%) with quantitatively tertiary-amine functionalization (0% ~ 25% molar ratio) was synthesized by in-situ copolymerization using 4-dimethylaminomethylstyrene (VBA) as comonomer. The polymerization process has obvious characteristics of controllable and living under mild conditions. The fine structure of the product was analyzed by 1HNMR, FTIR, GPC and DSC. In situ anionic copolymerization provides a new way to develop high-performance liquid rubber.