Synthesis of Syndiotactic Polystyrene (s-PS) Containing a Terminal Polar Group and Diblock Copolymers Containing s-PS and Polar Polymers

Syndiospecific Living Block Copolymerization of Styrenic Monomers Containing Functional Groups, and Preparation of Syndiotactic Poly{(4-hydroxystyrene)-block-[(4-methylstyrene)-co-(4-hydroxystyrene)]}

“…[32] This synthetic method afforded well-defined diblock copolymers, but this method also formed fairly large amounts of homopolymers (about 10%) which were initiated by the radical in a bicyclic ring of 9-borabicyclo[3.3.1]-nonane (9-BBN). [32] We have reported that the syndiospecific living polymerization of several kinds of styrenic monomers (4-methylstyrene (4MS), [33,34] styrene, [34] 4-(tert-butyldimethylsilyloxy)styrene (TBDMSS) [35] ) proceeds by the (trimethyl)pentamethylcyclopentadienyltitanium (Cp*TiMe 3 )/tris(pentafluorophenyl)borane (B(C 6 F 5 ) 3 )/trioctylaluminum (AlOct 3 ) catalytic system. We also reported on the syntheses of well-defined syndiospecific diblock copolymers of styrene and 4MS by sequential living polymerization with high block efficiency using the above three-component catalytic system.…”

Synthesis and characterization of functionalized syndiotactic polystyrene copolymers

“…Recently, Xu and Chung showed the desirability of introducing polar groups onto sPS to improve adhesion and compatibility. 4 Sulfonation of sPS was described by Order et al 5 Hydroxylated sPS was prepared via a poly(styrene-co-4-tert-butyldimethylsilyloxystyrene) precursor by Kim et al 6 In general, when 4-methylstyrene is introduced to a sPS backbone, the crystallinity of sPS decreases with increases in the 4-methylstyrene content. However, at low 4-methylstyrene content, the sPS copolymer can be functionalized in benzyl groups without destruction of its crystallinity.…”

Grafted polydimethylsiloxane onto syndiotactic poly(styrene-co-p-methylstyrene): Synthesis and characterization

“…For example, Xu and chung introduced polar groups into sPS with hope of improving adhesion and compatibility. 9 There are some other reports discussing the modification of sPS-based polymers including sulfonated sPS, 10-12 acetylated and benzoylated sPS, 13,14 maleated sPS, 15,16 succinoylated sPS, 17 hydroxylated sPS 18 and a series of sPS graft copolymers synthesized using ATRP technique with brominated and bromoacetylated sPS as initiators. 19,20 This pathway suffers from the unreactive nature of hydrocarbon polymer, leading to difficult reactions.…”