Structure and Properties of Bisoxalamide- based Segmented Block-Copolymers with Controlled Crystal Thickness

摘要

Recent advances in the design of thermoplastic elastomers stimulated further research into their structure and morphology. 1 At service temperatures these materials typically exhibit a phase- separated morphology which depends on the chemical structure, weight fractions and polydispersity of the soft and hard blocks, as well as on preparation conditions such as the sample thermal history. The segmented block copolymers with uniform hard units constitute a special type of TPEs showing fast and nearly complete crystallization. Their morphology is characterized by ribbon-like crystals immersed in a soft-segment matrix. 2 Such monodisperse polymer crystals constitute a rather rare experimental observation.