Journal
PHYSICA SCRIPTA
Volume 97, Issue 10, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1402-4896/ac8c6f
Keywords
polyamide; hydrogen bond; phase transition
Categories
Funding
- Natural Science Foundation of China [51803155]
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During the fiber spinning process, the stretching process plays a key role in improving the mechanical properties of materials. This study comparatively investigated the effect of hydrogen bond density on the aggregation structure evolution of three polyamides. The results showed that with the increase of hydrogen bond density, the tensile strength and crystallinity of the materials gradually increased. Furthermore, significant differences were observed in the phase transition process of the three polyamides due to the difference in hydrogen bond density.
During the fiber spinning process, the stretching process is the key to improve the mechanical properties of materials. It is very important to study the effect of hydrogen bond density on the aggregation structure evolution of polyamide for the preparation of high-performance fibers. In this paper, three kinds of polyamides (polyamide 6, polyamide 612 and polyamide 1212) were comparatively studied. In these three polyamides, the hydrogen bond density showed a gradient trend. With the increase of hydrogen bond density, the tensile strength and crystallinity of the materials gradually increased. The phase transition process of the three polyamides had significant difference. This was due to the difference of hydrogen bond density which resulted in different thermally stability of crystal blocks. Finally, the phase evolution schematic of polyamides depending on hydrogen bond density and stretching strains was established.
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