Solid State Behavior of Linear Polyesters and Polyamides |
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Page 39
The effect of crystallinity on the rate of solid state post - polycondensation has
been studied by other investigators also ( 95 , 132 ) . In his work on equilibria in
solid state polyamidations , Zimmerman ( 95 ) assumed that the end groups are
in ...
The effect of crystallinity on the rate of solid state post - polycondensation has
been studied by other investigators also ( 95 , 132 ) . In his work on equilibria in
solid state polyamidations , Zimmerman ( 95 ) assumed that the end groups are
in ...
Page 54
Another important evidence is that samples with higher initial crystallinity due to
heat treatment prior to healing have higher interface shear stress values than
those with lower crystallinity ( under identical healing conditions ) ( Table 12 ...
Another important evidence is that samples with higher initial crystallinity due to
heat treatment prior to healing have higher interface shear stress values than
those with lower crystallinity ( under identical healing conditions ) ( Table 12 ...
Page 216
Crystallinity data were based on DSC measurements and on the literature value
45 cal / g ( 58 ) for the heat of melting of the perfect crystal . The crystallinity of
unextruded PA 6 was 28 % , that of the unextruded residue in the rheometer kept
at ...
Crystallinity data were based on DSC measurements and on the literature value
45 cal / g ( 58 ) for the heat of melting of the perfect crystal . The crystallinity of
unextruded PA 6 was 28 % , that of the unextruded residue in the rheometer kept
at ...
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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