Ethynyl groups have received much attention as a function capable of thermal chain extension and cross-linking by an addition process. Many ethynyl or acetylene-terminated (AT) aromatic systems show promise for uses in composite applications because they have been shown or proposed to form highly cross-itnked matrices when heated above 200 OC (7- 6). The use of prapynoic acid as an acetylene-terminating agent appeared attractive ...
