| abstract |
A series of novel phosphorus-containing compounds having the following formula is provided: n n n n n n n n n n n n in which: n R 1 -R 4 , A, Q and m are as defined in the specification. n n n n n A process for the preparation of the compound of formula (I) is also provided. A polymer of formula (PA), and preparation process and use thereof are further provided. A polymer of formula (PI), and preparation process and use thereof are also provided. |