Sphere-to-rod transition of triblock copolymer micelles at room temperature

Pramana

V K Aswal¹  P A Hassan³  R Ganguly1³  J V Yakhmi²  I K Gopalakrishnan³ 

[1] Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India$$;TP&PED, Bhabha Atomic Research Centre, Mumbai 400 085, India$$;Novel Materials and Structural Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India$$

关键词: Block copolymer;    light scattering;    small-angle neutron scattering.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

A room temperature sphere-to-rod transition of the polyethylene oxide-polypropylene oxide-polyethylene oxide-based triblock copolymer, (PEO)20 (PPO)70 (PEO)20 micelles have been observed in aqueous medium under the influence of ethanol and sodium chloride. Addition of 5-10% ethanol induces a high temperature sphere-to-rod transition of the micelles, which is brought to room temperature upon addition of NaCl. The inference about the change in the shape of the micelles has been drawn from small-angle neutron scattering (SANS) and viscosity studies.

【 授权许可】

Unknown