TY - CHAP
T1 - A comparative DSC, X-ray and NMR study on the crystallinity of isomeric aliphatic polyamides
AU - Goderis, B.
AU - Klein, P.G.
AU - Hill, S.P.
AU - Koning, C.E.
PY - 2005
Y1 - 2005
N2 - In the polyamides 4.12, 10.6, 8.8 and 6.10 three fractions are present. The WAXD crystallinity is comparable to that of DSC and amounts to 40% in all samples. The rigid fraction obtained by solid state NMR is, however, close to 60%, pointing at 20% rigid amorphous material. A combination of the NMR, WAXD and SAXS results reveals that the latter fraction is situated inside the crystalline phase and not at the crystalline – ‘mobile amorphous’ interface. Accordingly, one third of the crystalline layers with a thickness between 50 and 56 Å is not truly crystalline. From the width of the WAXD 100 reflections it can be deduced that crystalline grains exist with lateral dimensions of approximately 100 Å. Hence a picture emerges of alternating solid and liquid-like layers with the former consisting of crystalline grains separated by rigid amorphous matter.
AB - In the polyamides 4.12, 10.6, 8.8 and 6.10 three fractions are present. The WAXD crystallinity is comparable to that of DSC and amounts to 40% in all samples. The rigid fraction obtained by solid state NMR is, however, close to 60%, pointing at 20% rigid amorphous material. A combination of the NMR, WAXD and SAXS results reveals that the latter fraction is situated inside the crystalline phase and not at the crystalline – ‘mobile amorphous’ interface. Accordingly, one third of the crystalline layers with a thickness between 50 and 56 Å is not truly crystalline. From the width of the WAXD 100 reflections it can be deduced that crystalline grains exist with lateral dimensions of approximately 100 Å. Hence a picture emerges of alternating solid and liquid-like layers with the former consisting of crystalline grains separated by rigid amorphous matter.
U2 - 10.1007/b107335
DO - 10.1007/b107335
M3 - Chapter
SN - 3-540-25323-5
T3 - Progress in colloid and polymer science
SP - 40
EP - 50
BT - Scattering methods and the properties of polymer materials
A2 - Stribeck, N.
PB - Springer
CY - Berlin
ER -