In this study, metallo‐supramolecular polyesters with multiple coordination bonds along the chains are prepared, to demonstrate a simple strategy to control both the thermal property and crystallizability. Firstly, polyesters with multiple pyridine‐ligands are synthesized through melt polycondensation and subsequent Michael addition reaction. By adding a metal salt (ZnCl2), the fraction of metal‐coordinated pyridine‐ligands is systematically increased with increasing the Zn2+/pyridine‐ligands mole ratio according to Fourier transform infrared spectroscopy (FT‐IR) measurements, which is found to play a role in tuning the glass transition temperature. The metal‐ligand coordination simultaneously causes the disappearance of crystallization/melting peaks in differential scanning calorimetry (DSC) thermograms, and scattering measurements also indicate the disappearance of crystalline domains. A transparent film is thus obtained after blending small amounts of ZnCl2 (≪10 wt%), although the neat crystalline sample is highly opaque. This non‐crystallization phenomenon is induced by inhibition of the chain arrangement due to the existence of metal salts dispersed via coordination with pyridine‐ligands. By changing the fraction of pyridine‐ligands in the chain, it is found that the wider temperature range Tg tuning can be achieved for samples with higher ligand fractions.

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Nonionic aliphatic polymers containing ester and sulfonyl moieties, [poly(ester‐sulfones)s] were found to undergo anode‐selective electrophoresis under electrophoretic deposition conditions. Herein are reported the syntheses of unsaturated nonionic polyesters containing sulfide linkages and double bonds on the polymer backbone via acyclic diene metathesis polymerization using a Grubbs' catalyst. Subsequent oxone oxidation was carried out, affording the corresponding poly(ester‐sulfone), followed by electrophoretic deposition of the unsaturated poly(ester‐sulfone) onto stainless steel. Subsequent UV‐irradiation cured the deposited film, improving the peeling strength of the coating.

We propose a simple molecular design of glassy-b-soft-b-glassy ABA triblock copolymer-based elastomers with enhanced mechanical properties by blending a very small amount of photoreactive cross-linker polymers with small molecular weight. In the blend, the cross-linker polymer is selectively incorporated into the B block matrix, and UV irradiation locally forms cross-links on the network strands. The present design achieves mechanical property enhancement without sacrificing elongation ability and recyclability. Such enhancement is discussed in terms of the increase in the fraction of effective bridge chains connecting glassy cross-link domains and the enhanced deformation recovery of self-assembled nanostructures.

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