Polymer Segmental Cross-Correlations from Dielectric Relaxation Spectra of Block Copolymers

TL;DR

This paper introduces a model-free method to analyze dielectric relaxation spectra of block copolymers, enabling the extraction of dynamic cross-correlations between different chain segments without assuming a specific polymer dynamics model.

Contribution

It presents a novel approach to isolate segmental cross-correlations directly from experimental spectra, avoiding reliance on predefined dynamic models.

Findings

Successfully isolates cross-correlation spectra for specific block copolymers

Demonstrates the method's ability to analyze complex polymer dynamics

Provides insights into segmental interactions without model assumptions

Abstract

Dielectric relaxation spectra of block polymers containing sequential type-A dipoles are considered. Spectra of a specific set of block copolymers can be combined to isolate the dynamic cross-correlation between the motions of two distinct parts of the same polymer chain. Unlike past treatments of this problem, no model is assumed for the underlying polymer dynamics.