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In order to avoid the serious melt-dripping problems caused by conventional phosphorus flame retardants, a new arylene-ether containing monomer named 2,2′-(4,4′-(1,4-phenylenebis(oxy))bis(4,1-phenylene))bis(oxy) diethanol (PBPBD) was synthesized and introduced into the PET main-chain via condensation polymerization. With the incorporation of arylene-ether units, the thermal stability and the char...
Polystyrene (PSt)/polytetrahydrofuran (PTHF) A2B2 miktoarm star copolymers were prepared by transformation of cationic ring-opening polymerization (CROP) to atom transfer radical polymerization (ATRP). The synthetic approach involves the synthesis of PTHF with two secondary bromine groups in the center of a macromolecular chain, (PTHF)2Br2, by the CROP of THF with the symmetric tetrafunctional initiator...
A new four-armed tetraol, poly(1,5,7,11-tetraoxaspiro [5,5] undecane) tetraol (poly(TOSU)), was prepared by the cationic ring-opening polymerization of TOSU using BF3·OEt2 as initiator. Its structure was characterized by 1H, 13C NMR and FTIR spectra. GPC curves showed that the polymer obtained had two fractions with higher and lower molecular weights; however, each had a relatively narrow molecular...
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