【求助】(已应助)再求两篇英文文献

就这么点点的信息啊

C. A. Pryde。IR studies of polyimides. I. Effects of chemical and physical changes during cure 《Journal of Polymer Science Part A:Polymer Chemistry》Volume 27 Issue 2, Pages：711-724

Devendra Kumar。Condensation polymerization of pyromellitic dianhydride with aromatic diamine in aprotic solvent: A reaction mechanism。《Journal of Polymer Science: Polymer Chemistry Edition 》Volume 19 Issue 3, Pages：795-805

1 ok.

IR studies of polyimides. I. Effects of chemical and physical changes during cure---JPolSciA.pdf

2 ok.

Condensation polymerization of pyromellitic dianhydride with aromatic diamine in aprotic solvent-A reaction mechanism---JPolSciA.pdf