摘要 |
<p>A new composition of matter comprising an acrylamide or methacrylamide monomer characterized by the following structural formula: < IMG > wherein Rl and R2 are hydrogen or methyl; R3, R4, R5, R6 and R7 are lower alkyls; n is an integer ranging from 1 to 6; and X and Y are the same or different anions.</p> |