Abstract
Small-angle neutron scattering was used to measure the influence of temperature on the radius of gyration in the melt of atactic polypropylene and poly(l-butene). The chain dimension temperature coefficient, d In (R2)o/dT, was found to be respectively −0.1 × 10−3 and 0.4 × 10−3 deg−1. These values, with one exception, disagree with the rotational isomeric state predictions as well as with those values obtained via intrinsic viscosity measurements either at θ conditions or in perceived athermal solvents. Conversely, excellent agreement was obtained with the values available from both thermoelastic and rheological measurements on atactic poly(1-butene).
Original language | English |
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Pages (from-to) | 6148-6155 |
Number of pages | 8 |
Journal | Macromolecules |
Volume | 25 |
Issue number | 23 |
DOIs | |
State | Published - Nov 1 1992 |
Externally published | Yes |