Syndiotactic Poly(4-methyl-1-pentene)-Based Stereoregular Diblock Copolymers: Synthesis and Self-Assembly Studies

Autor:	Yu-Chuan, Sung, Pei-Sun, Huang, Shih-Hung, Huang, Yeo-Wan, Chiang, Jing-Cherng, Tsai
Rok vydání:	2022
Předmět:	Polymers and Plastics General Chemistry stereoregularity end-functionalization block copolymer metallocene ATRP self-assembly
Zdroj:	Polymers; Volume 14; Issue 22; Pages: 4815
ISSN:	2073-4360
DOI:	10.3390/polym14224815
Popis:	Syndiotactic poly(4-methyl-1-pentene) (sP4M1P)-based stereoregular diblock copolymers, namely sP4M1P-b-polystyrene and sP4M1P-b-polymethylmethacrylate, were prepared from an α-bromoester-capped sP4M1P macroinitiator, which was chain extended with styrene and methyl methacrylate, respectively, via the atom transfer radical polymerization reaction. The α-bromoester-capped sP4M1P was generated by the esterification of hydroxyl-capped sP4M1P with α-bromoisobutyryl bromide. The hydroxyl-capped sP4M1P was synthesized by inducing a selective chain transfer reaction to aluminum during the syndiospecific polymerization of 4-methyl-1-pentene in the presence of a syndiospecific metallocene catalyst. As stereoregular diblock copolymers are difficult to prepare using existing methods, the current study offers an effective process for the preparation of sP4M1P-based stereoregular diblock copolymers. These copolymers were found to have well-defined architectures and they can undergo molecular self-assembly into ordered nanostructures, as evidenced by small-angle X-ray scattering analyses.
Databáze:	OpenAIRE
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