Synthesis and characterization of model polybutadiene-1,4-b-polydimethylsiloxane-b-polybutadiene-1,4 copolymers

被引：10
作者：
Ciolino, Andres E.
Villar, Marcelo A.
Valles, Enrique M.
Hadjichristidis, Nikos
机构：
[1] Univ Nacl Sur, CONICET, Planta Piloto Ingn Quim, RA-8000 Bahia Blanca, Argentina
[2] Univ Athens, Dept Chem, GR-15771 Athens, Greece
来源：
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | 2007年 / 45卷 / 13期
关键词：
anionic polymerization; block copolymers; characterization; high vacuum techniques; model triblock copolymers; polybutadiene-1,4; polydimethylsiloxane;
D O I：
10.1002/pola.22028
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Model copolymers of poly(butadiene) (PB) and poly(dimethylsiloxane) (PDMS), PB-b-PDMS-b-PB, were synthesized by sequential anionic polymerization (high vacuum techniques) of 1,3-butadiene and hexamethylciclotrisiloxane (D-3) on sec-BuLi followed by chlorosilane-coupling chemistry. The synthesized copolymers were characterized by nuclear magnetic resonance (H-1 NMR), size-exclusion chromatography (SEC), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC). SEC and H-1 NMR results showed low polydispersity indexes (M-w/M-n) and variable siloxane compositions, whereas DSC and TGA experiments indicated that the thermal stability of the triblock copolymers depends on the PDMS composition. (c) 2007 Wiley Periodicals, Inc.
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页码：2726 / 2733
页数：8
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