While I cannot provide a direct PDF download of copyrighted material, you can typically find this resource through the following legitimate channels: Oxford University Press : The official publisher's page for Soft Matter Physics University Libraries
A central theme in Doi’s book is the use of the Onsager Variational Principle to describe non-equilibrium dynamics. This provides a unified framework for deriving the transport equations for different types of soft matter, from the diffusion of particles in solution to the flow of entangled polymers. 2. Scaling and Coarse Graining
Masao Doi’s approach bridges the gap between everyday life and rigorous theory. He connects the physics of and nonequilibrium dynamics to things you can actually touch and play with, like blowing a bubble gum bubble or watching paint dry. Soft Matter Physics: Doi, Masao: 9780199652952 - Amazon.com