Solid State Behavior of Linear Polyesters and Polyamides |
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Page 93
For all molecular weights studied here , the maximum in the rate of crystallization
lies near 180°C . A temperature for the maximum rate of crystallization from the
melt is uniformly found to lie in the range 170 – 190°C , independent of PET ...
For all molecular weights studied here , the maximum in the rate of crystallization
lies near 180°C . A temperature for the maximum rate of crystallization from the
melt is uniformly found to lie in the range 170 – 190°C , independent of PET ...
Page 187
( 51 ] by courtesy of John Wiley and Sons , Inc . maximum tensile strength of the
drawn yarn were established by experiments , and the real - time history of
temperature and elongational rates were compared ( see Figure 31 ) .
( 51 ] by courtesy of John Wiley and Sons , Inc . maximum tensile strength of the
drawn yarn were established by experiments , and the real - time history of
temperature and elongational rates were compared ( see Figure 31 ) .
Page 200
the maximum temperature allowable to keep fiber strength above 9 gpd
increases with the increasing draw ratio . A plot of final strengths vs . yield
temperatures is given in Figure 44 . Comparing the plot with that of strength vs .
block ( or exit ) ...
the maximum temperature allowable to keep fiber strength above 9 gpd
increases with the increasing draw ratio . A plot of final strengths vs . yield
temperatures is given in Figure 44 . Comparing the plot with that of strength vs .
block ( or exit ) ...
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achieved acid additional amorphous annealing Appl applied aspect average behavior block bonding changes Chem chemical composites conclusion constant crack crystallinity crystallization curves decreases deformation density depends determined diameter diffusion direction distribution domains draw ratio drawn effect element energy Equation experiments extrusion factor fatigue fiber Figure fracture fracture toughness function given groups growth healing heat higher important increasing indicated initial length linear load lower material matrix maximum measurements mechanical melt method microfibrils microstructure modulus molded molecular weight molecules nylon nylon 66 observed obtained occurs orientation peak phase Phys polyamides polycondensation polyesters Polymer Sci polymerization properties range reaction regions reported Reprinted from Ref respectively samples SAXS scattering shows solid solid state polycondensation solid-state specimen speed stage strain strength stress structure studied Table temperature tensile units values yield