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A series of AB2 type monomers with terminal alkyne (A) and iodine (B) were synthesized from dichloromaleic anhydride by amidation with terminal alkynylamine followed by chlorine-iodine exchange reaction. Starting from these AB2 monomers, three kinds of fluorescent hyperbranched polymers with enediyne repeating units (HBEP1∼HBEP3) were synthesized via one-pot Sonogashira cross coupling polymerization...
In this paper, the reversible crystal-crystal transition of poly(hexamethylene dithiocarbonate) (PHMDC) has been systematically studied. According to various experimental results, we confirm that the transition shares the common features with Brill transition that is widely observed in nylons. This transition is clearly associated with the reversible trans-gauche conformational transformation of the...
Conjugated hyperbranched polyphenylene nanoparticles are fabricated by cross coupling reactions between an A 2 type monomer 1,4-phenylenediboronic acid (1) and B 3 type monomers 1,3,5-triiodobenzene (2) and 1,3,5-tribromobenzene (3). The Suzuki-type polycondensation was conducted with a highly efficient heterogeneous catalyst to give conjugated polymeric nanoparticles which are soluble...
Dynamic polystyrene (d-PS) and poly(n-butyl acrylate) (d-PBA) with an acylhydrazone linkage at each chain center were synthesized by atom transfer radical polymerization (ATRP) of corresponding monomers using a bis-bromoisobutyrate initiator bearing one acylhydrazone bond. Kinetic studies demonstrated that the polymerization followed a first-order mechanism. When treated with trifluoroacetic acid...
We reported that well-defined polymer brushes could be prepared efficiently via the grafting-onto approach and the polymer brushes grafted with poly(ethylene oxide) (PEO), poly(ε-caprolactone) (PCL) and mixed PEO/PCL have been obtained. Firstly, poly(glycidyl methacrylate)s, PG 100 and PG 940 , were prepared by controlled radical polymerization and their epoxy groups were reacted with...
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