New multiphase thermoplastic elastomers by combination of covalent and association‐chain structures

Abstract

A new type of multicomponent thermoplastic elastomers is prepared by attaching 4-(3,5-dioxo-l,2,4-triazolin4yl)benzoic acid to polybutadiene chains. The groups are difunctional with respect to a potential chain-molecule formation via reversible association. Thus, a covalent polymer is combined with an association polymer. Characterisation of the thermal and mechanical properties shows that phase separation between the two 'polymers' stabilizes the association polymer. The supramolecular ordered structure is characterised by the observation of a melting endotherm and birefringent textures in the material. The mechanical properties are comparable to thermoplastic elastomers based on covalent multiblock copolymers with high modulus and tensile strength.

Supramolecular Polymers – we've Come Full Circle

“…A main‐chain polymer was decorated supramolecularly with dangling side groups thereby generating a liquid‐crystalline polymer. Stadler and coworkers used hydrogen bonds to form nano‐clustered reversible crosslinks between macromolecular chains and used their dynamic nature for processing . Although these examples do not represent supramolecular polymers ( vide infra ), they represent some important nuclei to the field of supramolecular polymers and certainly have brought supramolecular chemistry and polymers closer together.…”

Hydrogen bonding and thermoplastic elastomers – a nice couple with temperature-adjustable mechanical properties

“…41,44 They are caused by local translational motions on different length scales as well as by bending and stretching patterns. 38 Specifically in semicrystalline polymers, a melting transition can be observed at temperatures higher than the T g . A melting can be related to large-scale motions like chain slippage.…”

In Honor of Reimund Stadler

“…He finished his habilitation in Macromolecular Chemistry in 1988 and then moved, as an associate professor in Organic and Macromolecular Chemistry, to the Johannes Gutenberg-Universität Mainz, Institute of Organic Chemistry, in 1989, where he was later appointed to full professor in 1991 after declining an offer from Northwestern University in Chicago. During the years in Mainz his group continued to work on blends [16,17] and semi-interpenetrating networks, [18,19] polymers with hydrogen bonding groups, [17,[20][21][22][23][24][25][26][27][28][29][30][31][32][33] with strong influence on works of other teams at the same time and later on, [34][35][36][37] but also extended the chemistry on triazoline dions into the direction of Diels-Alder polymers, [38][39][40][41] developed a synthetic route to polydialkylaminoisoprenes, [42,43] block copolymers with This collection starts with a trend article by Nikos Hadjichristidis and Alejandro Müller and co-workers on the morphology, crystallization behavior and properties of multicrystalline polymer systems based on triple crystalline triblock terpolymers (1900292). This topic is very well aligned with Reimund Stadler's research interest in the field of block copolymers with at least one crystalizable block.…”