Fully crosslinked, stable poly[cyclotriphosphazene‐co‐(4,4′‐sulfonyldiphenol)] (PZS) microspheres have been prepared via the polycondensation between hexachlorocyclotriphosphazene and 4,4′‐sulfonyldiphenol by precipitation polymerization. The diameter of the PZS microspheres ranged from 0.6 to 1.0 µm with the specific surface area of the microspheres ranging from 11.7 to 10.1 m2 · g−1. The formation of the non‐porous microspheres was observed to obey an oligomeric species absorbing mechanism. The fully crosslinked chemical structure of the PZS microspheres were determined by IR, CP/MAS NMR, XRD, and EDX. No glass‐transition temperature was observed and the onset of the thermal‐degradation temperature was 542 °C. Thermal stability of the PZS microspheres by the precipitation polycondensation was significantly improved as compared with crosslinked microspheres produced by addition polymerizations.

A series of benzocyclobutene (BCB) polymers derived from a new readily available monomer, 4-(1 0 ,1 0 -dimethyl-1 0 -vinyl) silylbenzocyclobutene (4-DMVSBCB), were conveniently prepared by radical and anionic polymerization. The homo-and co-polymerization results show that the reactivity of 4-DMVSBCB in anionic polymerization is relatively higher compared with radical polymerization. The molecular weight of 4-DMVSBCB polymers and content of 4-DMVSBCB can be controlled by anionic copolymerization. The introduction of rigid and crosslinkable BCB building blocks in side chains and carbosilanes in molecule gives rise to insulating materials with good film-forming property, smooth and flat film surface, and low-dielectric constants of 2.41-2.45, as preserving good thermal stability. FIGURE 8 TGA spectrum of highly crosslinked poly(4-DMVSBCB) under nitrogen atmosphere.FIGURE 9 TGA spectrum of highly crosslinked poly(4-DMVSBCB) under oxygen atmosphere.FIGURE 7 AFM spectra of pre-crosslinked and highly crosslinked poly(4-DMVSBCB) film. ARTICLE NEW POLYMERS DERIVED FROM 4-DMVSBCB MONOMER, YANG ET AL. 389

A stretchable silicon elastomer comprising cobalt ions in pyridine pendant polydimethylsiloxane (PDMS) was prepared. Different from previously reported cobalt-coordinated elastomers, these elastomers are self-healable at room temperature with a high healing efficiency of over 90%. Besides, they exhibit tailored solvatochromic properties over a wide range without sacrificing its self-healing ability at room-temperature.

Highly cross‐linked microspheres bearing active amino groups on the surface have been successfully synthesized via a single‐step precipitation polymerization of hexachlorocyclotriphosphazene (HCCP) with 4,4′‐diaminodiphenyl ether (ODA) in acetonitrile medium without any added surfactant. The active microspheres were characterized by Fourier transform infrared (FTIR), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and differential scanning calorimetry (DSC). The results revealed that the active microspheres had clean surfaces and they were in the size of micrometer range, varying from 0.5 to 2.5 µm. The accessibility of the surface amino groups to further functionalization was confirmed by the reaction of these groups with benzoxy chloride. Interestingly, the content of amino groups can be easily tailored through changing the molar ratio of HCCP to ODA. The effects of the concentration of HCCP and the monomer ratios on the morphology were also discussed.magnified image

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A co-coordinated PDMS@PET fabric exhibited high oil/water separation performance and rapid self-healing at room temperature.

Silver/organic-inorganic hybrid poly(cyclotriphosphazene-co-4,4′-sulfonyldiphenol) (PZS) coaxial nanocables were prepared by a facile method that involves two steps: the synthesis of silver nanowires through a soft, self-seeding, polyol process followed by adhesion of the PZS nanoparticles on the surface of silver nanowires to generate a cablelike nanostructure. Both Fourier transform infrared spectroscopy and elemental analysis were used to identify the highly cross-linked structures of PZS layers. Scanning electron microscopy and transmission electron microscopy results indicated that the nanocables had a core ca. 80 nm in diameter and a surrounding sheath with controllable thickness. Thermogravimetric analysis showed that the silver/PZS nanocables were stable up to 440 °C under air atmosphere. This approach could be extended to other metal nanocables wrapped with highly cross-linked organic-inorganic hybrid polyphosphazenes.