Binary Copolymerization of p-Methylstyrene with Butadiene and Isoprene Catalyzed by Titanium Compounds Showing Different Stereoselectivity

被引：42

作者：

Buonerba, Antonio ^{[1
]}

Fienga, Maria ^{[1
]}

Milione, Stefano ^{[1
]}

Cuomo, Cinzia ^{[1
]}

Grassi, Alfonso ^{[1
]}

Proto, Antonio ^{[1
]}

Capacchione, Carmine ^{[1
]}

机构：

[1] Univ Salerno, Dipartimento Chim & Biol, I-84084 Fisciano, SA, Italy

来源：

MACROMOLECULES | 2013年 / 46卷 / 21期

关键词：

ISOSPECIFIC STYRENE POLYMERIZATION; SYNDIOTACTIC POLYSTYRENE; BLOCK-COPOLYMERS; STEREOSPECIFIC POLYMERIZATION; SUBSTITUTED STYRENES; TETRADENTATE; ETHYLENE; COMPLEX; METALLOCENE; LIGAND;

D O I：

10.1021/ma401621v

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The synthesis of p-methylstyrene-butadiene and p-methylstyrene-isoprene binary copolymers promoted by the titanium complexes Ti(eta(5)-C5H5)-(kappa(2)-MBMP)Cl (1) (MBMP = 2,2'-methylenebis(6-tert-butyl-4-methylphenoxo)) and chloro{1,4-dithiabutanediyl-2,2'-bis(4,6-di-tert-butylphenoxy)}titanium (2) activated by methylaluminoxane (MAO) is reported. Syndiotactic poly(p-methylstyrene)-co-cis-1,4-poly(butadiene) and syndiotactic poly(p-methylstyrene)-co-cis-1,4-polyisoprene were obtained using catalyst 1, whereas isotactic poly(p-methylstyrene)-co-trans-1,4-poly(butadiene) and isotactic poly(p-methylstyrene)-co-trans-1,4-polyisoprene were obtained using the catalyst 2. C-13 NMR analysis of the copolymer microstructure allowed to assess the monomer block lengths and distribution in the polymer chain, revealing a blocky distribution of the two monomers along the polymer chain in the presence of the catalyst 1 and a random distribution with the catalyst 2 for both binary copolymers.

引用

页码：8449 / 8457

页数：9

共 64 条

[11] Isospecific styrene polymerization by chiral titanium complexes that contain a tetradentate [OSSO]-type bis(phenolato) ligand [J].