The invention provides a method for promoting the curing reactions of an acetylenic oligomer or polymer, characterized in that the oligomer or polymer is cured in the presence of sulfur or an organic sulfur derivative which is capable of lowering the temperature of cure of the oligomer or polymer. The invention also provides a process for producing a polyimide oligomer or polymer containing an aliphatic or aromatic disulfide moiety which is covalently bound to, and forms an integral part of the oligomer or polymer and which is capable of lowering the temperature of cure of the oligomer or polymer, characterised in that a suitable amount of a diamino-disulfide or dianhydride-disulfide, or any suitable derivative or precursor thereof, is introduced into the mixture of aromatic diamines, tetracarboxylic dianhydrides, and the phenylethynyl-substituted amine or anhydride normally used for the reparation of the oligo-imide.

_ invención proporcionar uno método para promoting curing reacción uno acetilénico oligomer o polímero, caracterizar en que oligomer o polímero ser curar en presencia sulfuro o uno orgánico sulfuro derivado que ser capaz lowering temperatura curar oligomer o polímero. _ invención también proporcionar uno proceso para producing uno polyimide oligomer o polímero containing uno alifático o aromático disulfuro moiety que ser covalente limitar, y forma uno integral parte oligomer o polímero y que ser capaz lowering temperatura curar oligomer o polímero, caracterizar en que uno conveniente cantidad uno diamino-disulfuro o dianhydride-disulfuro, o cualquier conveniente derivado o precursor de eso, ser introduced en mezcla aromático diamina, tetracarboxylic dianhydrides, y phenylethynyl-substituir amina o anhídrido normal used para reparación oligo-imida. _