Microdomain spacing of ABB graft copolymers and their chain conformations in bulk

✍ Scribed by J. Watanabe; N. Torikai; J. Suzuki; Y. Matsushita

• Book ID: 104152051
• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 134 KB
• Volume: 60
• Category: Article
• ISSN: 0022-3697
• DOI: 10.1016/s0022-3697(99)00119-5

✦ Synopsis

Lamellar microphase-separated structures of graft copolymers of the ABB type were investigated by both small-angle X-ray (SAXS) and neutron (SANS) scattering. The samples used are two three-arm star-shaped polymers, with a polystyrene graft at the centre of a poly(2-vinylpyridine) chain, i.e. poly(2-vinylpyridine-g-styrene-h 8 ) (SPP-30) and its deuterium labelled counterpart poly (2-vinylpyridine-g-styrene-d 8 ) (DPP-30). Lamellar domain spacing of the 0.13/0.87 mixture was measured by SAXS, and evaluated to be 83 nm, which is smaller than that of styrene-2-vinylpyridine (SP) diblock copolymer with the same molecular weight and composition. This result is due to the difference in the chain architecture between the SPP graft and SP block copolymers.