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Dipole moments of poly(methylmethacrylate)-poly(4-vinylpyridine) block copolymers

✍ Scribed by Nihan Nugay; Zuhal Küçükyavuz

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
396 KB
Volume
31
Category
Article
ISSN
0014-3057

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✦ Synopsis

The mean-square dipole moments of poly(methylmethacrylate~poly(4-vinylpyridine) block copolymers have been determined from dielectric constant measurements on dilute solutions in toluene at different temperatures in the range 3065°C. The temperature coefficient of the mean square dipole moment was found to be positive. Dipole moment values for block copolymers show a linear dependence on the dipole moments of component homopolymers which indicates that the intermolecular interaction between the blocks are not as high as that of random or alternating copolymers. Results are in accordance with the prediction of rotational isomeric state theory.

📜 SIMILAR VOLUMES

Anionic synthesis of poly(methylmethacry
Anionic synthesis of poly(methylmethacrylate)-poly(4-vinylpyridine) diblock copolymers in the presence of LiCl
✍ Nihan Nugay; Claude Hosotte; Turgut Nugay; Gerard Riess 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 288 KB

Poly(methylmethacrylate)-poly(4-vinylpyridine) diblock copolymers were synthesized by sequential anionic polymerization, l,l-diphenyl-3-methylpentyllithium was used as initiator and LiCI was added to the system as ligand to modify both initiator and active chain end in order to avoid side reactions.

Multiple Morphologies and Their Transfor
Multiple Morphologies and Their Transformation of a Polystyrene-block-poly(4-vinylpyridine) Block Copolymer
✍ Libin Liu; Xiang Gao; Yong Cong; Binyao Li; Yanchun Han 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 269 KB

## Abstract **Summary:** We report the multiple morphologies and their transformation of polystyrene‐__block__‐poly(4‐vinylpyridine) (PS‐__b__‐P4VP) in low‐alkanol solvents. In order to improve the solubility of polystyrene block in alcohol solvents, the solution of block copolymer sample was treat