Yang, Ke; Liu, Qiang; Wen, Shuai; Zhuang, Tao published the artcile< Synthesis of branched polyisobutylenes via cationic copolymerization of p-chloromethylstyrene and isobutylene>, COA of Formula: C9H9Cl, the main research area is branched chloromethylstyrene polyisobutylene cationic copolymerization polydispersity kinetics.
Branched polyisobutylenes (PIBs) with relatively low dispersities (1.4-1.8) and benzylic halide functionalities are synthesized by self-condensing vinyl cationic copolymerization of p-chloromethylstyrene (p-CMS) and isobutylene (IB) coinitiated by TiCl4. It is found that the [IB]/[p-CMS] feed ratio plays a crucial role for the initiating behavior of p-CMS: the initiation arising from p-CMS is suppressed at [IB]/[p-CMS] ≥17; in contrast, the pendant benzyl chloride moiety of p-CMS monomer in the formed copolymer chains can initiate branching reactions. The resulting branched PIBs are of a gradient composition as well as a gradual increase in branching d. due to large disparity in reactivity ratios. This strategy is successfully employed to create branched PIBs with low to moderate mol. weights (Mn, 5 k-78 k Da) through controlling the monomer/initiator mole ratio. However, it is shown that this method failed to obtain branched PIBs with high Mn, bearing a complicated copolymerization mechanism.
Journal of Polymer Science (Hoboken, NJ, United States) published new progress about Cationic polymerization. 1592-20-7 belongs to class chlorides-buliding-blocks, and the molecular formula is C9H9Cl, COA of Formula: C9H9Cl.
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics