A STUDY OF THE RELATIONSHIP BETWEEN THE MECHANICAL PROPERTIES AND PROCESSING FOR SELF-REINFORCED POLYMERS 5.A New Method for Determining the Theoretical strength of Oriented Polymers from Experiments

A new method for determining the theoretical strength of oriented polymers was developed.It is based on the kinetic model theory of creep strength,in which altinetic equation for bond rupture of overs-stressed Taut Tie Molecules(TTM)and/or Trapped Entanglement Chains(TEC) in the disordered domain is established by using the coefficient of overstressed TTM and/or TEC as a variable.After integration and simplification a general correlation among the tensile strength with the primary molecular weight, the processing condition and durability was obtained. When the drawn ratio of processing and primary molecular weight is extropolsted to infinity, a general relation of actual tensile strength to the theoretical strength,the fraction of TTM and/or TEC(A new method for determining the theoretical strength of oriented polymers was developed.It is based on the kinetic model theory of creep strength,in which a ltinetic equation for bond rupture of oversstressed Taut Tie Molecules(TTM)and/or Trapped Entanglement Chains(TEC) in the disordered domain is established by using the coefficient of overstressed TTM and/or TEC as a variable.After integration and simplification a general correlation among the tensile strength with the primary molecular weight, the processing condition and durability was obtained. When the drawn ratio of processing and primary molecular weight is extropolsted to infinity, a general relation of actual tensile:trength to the theoretical strength,the fraction of TTM and/or TEC(Xe3)in the disordered domain and theromal fluctuation was derived.Based upon this relation a new method for determinirg the theoretical strength of oriented polymers from the measurement of the actuate strength and the fraction of TTM and/or TEC and of fiblillar materials was proposed.The theoretical strength of UHMWPE chain was yielded by this method.)in the disordered domain and theromal fluctuation was derived.Based upon this relation a new method for determinirg the theoretical strength of oriented polymers from the measurement of the actuate strength and the fraction of TTM and/or TEC and of fiblillar materials was proposed.The theoretical strength of UHMWPE chain was yielded by this method.