Endgroup substituent effects on the rate/extent of network formation and adhesion for phenylethynyl-terminated poly(arylene ether sulfone) oligomers

Synthesis of Thermally Cross-Linkable Fluorine-containing Poly(aryl ether ketone)s I. Phenylethynyl Terminated Poly(aryl ether ketone)s

“…[6][7][8][9][10][11][12][13][14][15] It is of importance to design the cross-linkable moiety that crosslinking reaction should occur without the evolution of small volatile compounds to form the clear film and coating. Cross-linkable moieties that meet the required condition are phenylethynyl, cyanate, benzocyclobutane and so on.…”

“…7 Various oligomers, such as imide, sulfone and so on, terminated by phenylethynyl moiety have been reported. [8][9][10][11][12][13][14] Upon thermal curing, they undergo a complex reaction involving chain extension, branching and cross-linking to afford materials with attractive properties such as solvent resistance and thermal stability. The phenylethynyl group offers certain distinct advantages over other reactive groups.…”

Synthesis, characterization and thermal crosslinking behavior of new poly(aryl ether sulfone)s based on naphthalene isomers

“…These results are attributed to the occurrence of thermal crosslinking reactions only taking place in polymer series a. The temperatures of crosslinking reactions of polymer series a are lower than those for the corresponding poly(aryl ether sulfone)s that have been reported [20][21]. After the heating treatment, polymer series a cannot dissolve in the common organic solvents but polymer series b still have good solubility, which also indicates polymer series a underwent crosslinking reactions but polymer series b did not.…”

“…Interestingly, the work mentioned above [20][21] discussed about the crosslinking behavior of poly(aryl ether sulfone) and poly(aryl sufones) with some curable end groups such as phenylethynyl group or hydroxyl terminated along with cyanurates, while in this work, because of the presence of the naphthalene ring, the crosslinking behavior happened without any such activating groups. When heated in the air atmosphere, two kinds free radicals, RO• type free radicals and naphthalene ring free radicals were excited via which the crosslinking reaction took place [22].…”

Poly(aryl ether sulfide)s by sulfide-activated nucleophilic aromatic substitution polymerization

“…One area in which he has made a sizable impact is in the class of polymers known as poly(aryl ether)s, where he has contributed to the development of synthesis techniques, the characterization of polymer properties, and materials design for application with more than 150 publications. Some of the more noteworthy accomplishments include the development of the potassium carbonate 'weak base' method of synthesis [1], the use of phenylphosphine oxide activated monomers and the characterization of the resulting polymers [2][3][4][5][6][7][8][9][10][11], the production of high temperature thermosets from reactive oligomers [9,[11][12][13][14], and most recently in the design of activated sulfonate monomers for the synthesis of well-defined sulfonic acid functionalized poly(aryl ether sulfone)s and poly(aryl sulfide sulfone)s for use as improved PEM fuel cell membranes [15][16][17][18][19][20][21][22][23][24][25][26].…”