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Small-angle neutron scattering study on the transamidition of polyamide-4.6

✍ Scribed by Rolf Scherrenberg; Joost Moonen; Kell Mortensen

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
495 KB
Volume
34
Category
Article
ISSN
0887-6266

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✦ Synopsis

The interchange or so-called transamidation process in polyamide-4.6 was investigated by means of small-angle neutron scattering (SANS). For this purpose, a 50/50 blend of partially deuterated and fully hydrogenous polyamide-4.6 was processed at 300Β°C for variable times (1-20 min). The obtained results are in line with the theory as described by Benoit to quantify the transesterfication process in homopolyesters. An exponential relaxation time T of approximately 1500 s was obtained. On the basis of this relaxation time 7 , it can be calculated that approximately four interchange reactions per chain occur in polyamide-4.6 during a typical processing time of 3 min at 300Β°C. The data interpretation is not complicated by the presence of some crystallinity in polyamide-4.6.

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