Tin-coupled star-shaped block copolymer of styrene and butadiene (I) synthesis and characterization
✍ Scribed by Huadong Feng; Xingying Zhang; Suhe Zhao
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 218 KB
- Volume
- 110
- Category
- Article
- ISSN
- 0021-8995
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## Abstract To understand the molecular architectures of styrene‐butadiene four‐arm star (SBS) copolymers, a size exclusion chromatography combined with laser light scattering (SEC‐LLS) has been used to determine their weight‐average molecular weight (__M__~w~) and radius of gyration (〈__S__^2^〉^1/
## Abstract A star‐shape styrene–butadiene–styrene triblock copolymer SBS (802) was synthesized and fractionated into four fractions coded as 802‐F1 (four arms), 802‐F2 (two arms), 802‐F3 (one arm), and 802‐F4 by repeating fractional precipitation. Their weight‐average molecular weight (__M__~w~) w