Cooperative structure formation by directed noncovalent interactions in an unpolar polymer matrix. 7. Differential scanning calorimetry and small-angle x-ray scattering

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

“…With increasing temperature, a decrease of both scattering maxima occurs. Similar effects have already been described and discussed by Hilger et al 20 and other groups.…”

“…1). Compared to formerly investigated homopolymer systems, [18][19][20] our copolymer system exhibits markedly improved mechanical properties. The choice of styrenebutadiene copolymers additionally allows for the adjustment of the glass transition temperature and hence for the control of the mechanical properties of the polymer.…”

“…This broad variety of different interactions includes p-p stacking, 5,6 metal-ligand interactions, [7][8][9][10] hydrophobic forces, 11,12 electrostatic effects, 13,14 and hydrogen bonding. 4,[15][16][17][18][19][20] Not only the functionalization of the precursor building blocks (telechelic units) for the polymer chains and networks is today synthetically quite feasible, 21,22 but also the post modification of a polymer along the chain. This offers the possibility to tune the properties of the polymer [23][24][25][26][27] and thus widens the range of potential applications eminently.…”

Local motions in polymeric and low molar mass supramolecular hydrogen bond assemblies: One‐ and two‐dimensional 2H‐NMR studies, full papers

“…la) [3-61. The segregation of these polar domains from the polybutadiene matrix was proved by small angle X-ray scattering (SAXS) [7]. lb) and thus act as extended junction zones.…”

Vinyl Monomers, Polymers and Supramolecular Assemblies from Aminocaprolactam

“…[3] Linear supramolecular polymers are possible in which the hydrogen-bonding between end groups defines the main chain of a linear polymeric material. The initial studies demonstrating that it is possible to obtain polymer-like rheological behavior from low molecular weight compounds were reported by Lehn, et al [4] and Meijer, et al [5] Since then, hydrogenbonded supramolecular materials from low molecular weight compounds and low molecular mass polymers have gained much interest, examples of which include stable glasses from mixtures of crystalline compounds; [6,7] strong fibers from the melts of supramolecular polymers; [8][9][10] thermoplastic elastomers with mechanical and rheological properties comparable to high molecular weight covalent polymers; [11][12][13][14][15][16][17][18] and thermo-reversible cross-linked networks prepared by both incorporation of hydrogen-bonding moieties onto the polymer backbone as side chains and end groups, and by addition of hydrogenbonding molecules as fillers or cross-linking agents. [19][20][21][22][23] However, one of the challenges for application driven research in the area of supramolecular polymers is to design and synthesize raw materials and monomeric units that are inexpensive and based on commercially available starting materials or those that are easily synthesized on a large scale in one or two steps.…”