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Showing 1 to 7 of 7 for “"cationic ring opening polymerization"”.
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The cationic ring-opening polymerization of cyclic ethers
The kinetics and mechanisms of ring opening polymerization and copolymerizntion of different cyclic ethers were studied using mainly a cationic system of iinitiation. BF30Et2/ethanediol. The cyclic ethers reacted differently showing that ring strain and basicity are the main driving forces in …
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Functional Polymer Materials: From Iptycenes to Ring-Opening Polymerizations
… response. In Chapter 3, we describe the living cationic ring-opening polymerization of a 2-alkylthio-2-oxazoline as a general platform for postpolymerization modification. Mild substitution conditions provide broad functional group tolerance, constituting a versatile postpolymerization …
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Synthesis and Functionalization of Poly(ethylene oxide-b-ethyloxazoline) Diblock Copolymers with Phosphonate Ions
… with phosphonic acid. This was achieved through cationic ring opening polymerization (CROP) of 2-ethyl-2-oxazoline monomer onto PEO. These polymerizations used tosylsulfonyl chloride as initiator. Size-exclusion chromatography (SEC) was used to determine the molecular weights of the block …
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Synthesis and characterization of perfectly alternating segmented copolymers comprised of poly(dimethylsiloxane)s and engineering thermoplastics
… endgroups and fully characterized prior to copolymerization. Thus, anhydride-terminated poly(dimethylsiloxane)s were prepared via cationic ring-opening polymerization in the presence of a "monofunctional" bis-norbornane anhydride disiloxane endcapping species. Aromatic amine-terminated …
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Transparent Omniphobic Coatings that are Flexible and Wear Resistant
… composite is prepared via the photo-initiated cationic ring-opening polymerization of the epoxide rings of glycidyloxypropyl polyhedral oligomeric silsesquioxane (GPOSS). While the desired hardness is rendered by the silica core of GPOSS, the flexibility is imparted by the glycidyloxypropyl …
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Synthesis and Characterization of Poly(2-Ethyl-2-Oxazoline) Functional Prepolymers and Block Copolymers
… magnetic resonance imaging and tissue engineering applications. The polymerization of 2-ethyl-2-oxazoline (EtOx) was investigated with regard to the effects of initiator structures and reaction parameters such as polymerization time and temperature on molecular weight control and molecular …
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Poly(2-alkyl-2-oxazoline) containing multiphase systems
This research is focused on the polymerization of 2-alkyl-2-oxazoline homopolymers and 2-alkyl-2-oxazoline containing copolymers with well-defined structures. In addition, the potential of selected materials as polymer blend compatibilizers was briefly evaluated. The polymerization of …