531521-23-0Relevant articles and documents
Synthesis and characterization of novel amphiphilic telechelic polyoxetanes
Fujiwara, Tomoko,Makal, Umit,Wynne, Kenneth J.
, p. 9383 - 9389 (2003)
Alcohol-terminated telechelic polyoxetanes with semifluorinated (FOx) and alkyl ether pendant groups (ME2Ox) were synthesized and characterized. These are amphiphilic telechelics by virtue of incorporation of both hydrophilic and hydrophobic repeat units.
Polycation quaternary ammonium salt high polymer material and preparation method thereof
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Paragraph 0035; 0036, (2016/10/10)
The invention belongs to the technical field of high polymer materials, and in particular relates to a polycation quaternary ammonium salt high polymer material and a preparation method thereof. The preparation method comprises: firstly, under an inert gas condition, carrying out ring-opening polymerization on an oxetane type monomer, a catalyst and an initiator in an anhydrous solvent, and then carrying out washing, drying, and reduced pressure distillation to remove the solvent, and carrying out refining and purification to obtain a polymer precursor; and under the inert gas condition, carrying out quaterisation on the obtained polymer precursor and excessive tertiary amine in the anhydrous solvent, and then carrying out high-vacuum-degree reduced pressure distillation to remove the solvent and the excessive tertiary amine so as to obtain the polycation quaternary ammonium salt high polymer material. The polycation quaternary ammonium salt high polymer material is novel in structure, has the advantages of board antibacterial spectrum, quickness, high efficiency, stable performance, indiffusion, impermeability, workability and the like, and can be widely applied to the aspects of skin nursing, wound cleaning, and antibacterial sterilization.
A ruthenium-catalyzed hydrosilane-induced polymerization of 3-alkyl-3-hydroxymethyloxetane derivatives: Facile access to functionalized polyoxetanes by virtue of organosilyl groups
Harada, Nari-Aki,Yasuhara, Jushiro,Motoyama, Yukihiro,Fujimura, Osamu,Tsuji, Tetsuro,Takahashi, Takeshi,Takahashi, Yoshiaki,Nagashima, Hideo
, p. 26 - 39 (2011/03/22)
Ring-opening polymerization of 3-alkyl-3-alkoxymethyl- or 3-alkyl-3-siloxymethyloxetanes is catalyzed by a triruthenium cluster, [Ru 3{μ3-(η2,η3, η5-C12H8)}(CO)7], in the presence of trialkylsilanes, providing a novel accessible method for functionalized polyoxetanes of Mn = 103-105. Oxetanes having alkoxy-, fluoroalkoxy-, triethyleneglycoloxy-, and trialkylsiloxy functions undergo polymerization and copolymerization. Consumption rates of two monomers in the copolymerization of 3-benzyloxymethyl- and 3-trimethylsiloxymethyl-3-alkyloxetanes are almost the same, indicating formation of random copolymers. The organosilyl group in the polymer and copolymers with siloxymethyl side chains is converted to CH3OH or CH2OCOR groups by hydrolysis or silyl/acyl exchange. These protocols give the way to access polymers or copolymers bearing OH and OCOR side chains. A ruthenium-catalyzed reaction of 3-ethyl-3- hydroxymethyloxetane with trialkylsilanes results in dehydrogenative silylation to give 3-ethyl-3-siloxymethyloxetane, which is followed by ring-opening polymerization. Combination of tandem dehydrogenative silylation/ring-opening polymerization/the silyl/acyl exchange realizes one-pot synthesis of polymers with CH2OCOR side chains from 3-ethyl- 3-hydroxymethyloxetane. DSC analyses of the formed polymers provided Tg and Tm data, which are a good example showing that the polymer properties are controlled by appropriate selection of functional groups at the side chain.
