| 摘要 |
A polythioether includes a structure having the formula IwhereinR1 denotes a divalent C2-6 n-alkyl, C3-6 branched alkyl, C6-8 cycloalkyl or C6-10 alkylcycloalkyl group, -[(-CH2-)p-X-]q-(-CH2-)r-, or -[(-CH2-)p-X-]q-(-CH2-)r- in which at least one -CH2- unit is substituted with a methyl group,R2 denotes methylene, a divalent C2-6 n-alkyl, C2-6 branched alkyl, C6-8 cycloalkyl or C6-10 alkylcycloalkyl group, or -[(-CH2-)p-X-]q-(-CH2-)r-,X denotes one selected from the group consisting of O, S and -NR6,R6 denotes H or methyl,m is a rational number from 0 to 10,n is an integer from 1 to 60,p is an integer from 2 to 6,q is an integer from 0 to 5, andr is an integer from 2 to 10.The polythioether is a liquid at room temperature and pressure. |
