crumbled product together with demi water was gently added into a condux lv15 15 n3 coagulator and the mixture was collected on a stainless steel filter the product was washed 4 times with 5 l of demi water collected in a 2 l glass beaker and dried under vacuum for 24 h at 80 u00b0 c to obtain a powdery product which has a relative viscosity of 5 77 for comparison ppta poly para phenylene terephthalamide obtained without polyacrylic acid has a relative viscosity of 5 58 a sample of about 0 5 g of the above polymer was brought into a test tube evacuated and heated to the temperature for the period as given in the table i a few drops of sulfuric acid 99 8 were carefully added tot a powdery sample or short filaments which was placed on a glass slide the sample was covered with a large glass cover slip and viewed with an olympus bx 51 optical microscope in phase contrast mode images were taken with a colorview iii ccd camera and processed with analysis v the results are presented in table i powdery sample and table ii yarns wherein bf t breaking force of heat treated yarn and bf i breaking force of yarn before heat treatment the compressive strength is determined by means of the elastica loop test elt as described by d sinclair j app phy vol 21 1950 380 385 and j h greenwood.