Highly durable polybenzazole composition, fiber and film

Abstract

There is provided a polybenzazole fiber or film containing a basic organic compound in the form of a monomer or a condensate, selected from the group consisting of guanidines, triazoles, quinazolines, piperidines, anilines, pyridines, cyanuric acids, and p-phenylenediamine, m-phenylenediamine and a mixture thereof. This fiber has characteristics in that the X-ray meridian diffraction half-width factor is 0.3°/GPa or less, that the elasticity decrement (Er) attributed to change of molecular orientation is 30 GPa or less, and that the breaking strength is 1 GPa or more. This fiber can be used in staple fiber, a spun yarn, a woven or knit fabric, a felt material, a composite material, a cord, a rod, a fibrous sheet, a knife proof vest or a bullet proof vest.

1 . A polybenzazole composition containing a basic substance.  
     
     
         2 . A polybenzazole composition according to  claim 1 , wherein the basic substance is an organic compound.  
     
     
         3 . A polybenzazole composition according to  claim 1 , wherein the basic substance is an organic compound soluble in water or a hydrophilic solvent.  
     
     
         4 . A polybenzazole composition according to  claim 1 , wherein the basic substance is selected from the group consisting of guanidines, triazoles, quinazolines, piperidines, anilines, pyridines and cyanuric acids.  
     
     
         5 . A polybenzazole fiber comprising a polybenzazole composition according to  claim 1 .  
     
     
         6 . A polybenzazole film comprising a polybenzazole composition according to  claim 1 .  
     
     
         7 . A polybenzazole fiber according to  claim 5 , which contains a basic organic compound in the form of a monomer or a condensate.  
     
     
         8 . A polybenzazole fiber according to  claim 5 , which contains a basic organic compound selected from the group consisting of p-phenylenediamine, m-phenylenediamine and a mixture thereof in the form of a monomer or a condensate.  
     
     
         9 . A polybenzazole fiber according to  claim 5 , wherein the X-ray meridian diffraction half-width factor is 0.3°/GPa or less.  
     
     
         10 . A polybenzazole fiber according to  claim 5 , wherein the elasticity decrement Er attributed to change of molecular orientation is 30 GPa or less.  
     
     
         11 . A polybenzazole fiber according to  claim 5 , wherein the breaking strength of the fiber is 1 GPa or more.  
     
     
         12 . A polybenzazole fiber according to  claim 5 , which is a staple fiber.  
     
     
         13 . A polybenzazole spun yarn comprising a polybenzazole fiber according to  claim 5 .  
     
     
         14 . A polybenzazole woven or knitted fabric comprising a polybenzazole fiber according to  claim 5 .  
     
     
         15 . A polybenzazole felt material comprising a polybenzazole fiber according to  claim 5 .  
     
     
         16 . A polybenzazole composite material comprising a polybenzazole fiber according to  claim 5 .  
     
     
         17 . A polybenzazole cord comprising a polybenzazole fiber according to  claim 5 .  
     
     
         18 . A polybenzazole rod comprising a polybenzazole fiber according to  claim 5 .  
     
     
         19 . A polybenzazole fibrous sheet for reinforcing cement and concrete, said sheet comprising a polybenzazole fiber according to  claim 5 .  
     
     
         20 . A polybenzazole fibrous sheet for reinforcing cement and concrete, wherein the breaking strength of said sheet is 50 kg/cm or more.  
     
     
         21 . A high strength fiber comprising a polybenzazole fiber according to  claim 5 .  
     
     
         22 . A knife-proof vest comprising a polybenzazole fiber according to  claim 5 .  
     
     
         23 . A bullet-proof vest comprising a polybenzazole fiber according to  claim 5.