期刊
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
卷 27, 期 4, 页码 757-767出版社
WILEY
DOI: 10.1002/vnl.21847
关键词
epitaxial nucleation; polyester; structure of molecular aggregation; thermal stability; uracil
资金
- National key Research and development program of China [2018YFE0106400]
- Natural Science Foundation of Tianjin City [20JCYBJC00580]
- National Natural Science Foundation of China [41907329]
A novel bio-composite was fabricated using poly(ethylene adipate) (PEA) and naturally occurring uracil (URA), resulting in enhanced crystallizability and thermal degradation stability. The addition of URA acted as a nucleator (NA) and contributed to the flame retardance effect observed in the PEA/URA composite.
We fabricated a novel bio-composite using the poly(ethylene adipate) (PEA) and naturally occurring uracil (URA), in which the URA with the full biocompatibility and degradability acted as a nucleator (NA). A distinct enhancement was found in the crystallizability, melt-crystallization temperature (T-c), and crystallization rate of the PEA upon incorporation of the URA, an indicative of a good NA of the URA. The underlying nucleation mechanism of the PEA is the epitaxial nucleation, attributed to the extremely good matching between the crystal lattice of the PEA and URA. The H-bond interaction exists between the carbonyl/ester segment of the PEA crystalline phase and URA. With loading of the URA, both the carbonyl and ester fell behind the CH2 in the segmental reorganization in the crystallization process of the PEA. The PEA/1%URA showed an enhancement in the T-d in the TG measurement (i.e. increased stability in thermal degradation), mainly attributed to the flame retardance effect of the URA.
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