High‐strength/high‐modulus organic fibers

Current trends and developments taken from the literature are reviewed and some new work from the laboratories of Monsanto Company is presented concerning the use of aromatic polymers for high‐strength/high‐modulus fibers. In the area of aromatic polymer synthesis, pertinent information concerning the factors necessary for the attainment of high molecular weight for the heat‐resistant type polymers and for the ultra‐rigid type polymers is discussed. Some new polymers and new routes of synthesis for rod‐like polymers are described along with the tensile properties of fibers from these novel polymers.