Epitaxial nucleation, modulated structure of molecular aggregation, and enhanced thermal degradation temperature of poly(ethylene adipate): Effects of the naturally occurring uracil as a nucleator,Journal of Vinyl and Additive Technology

当前位置： X-MOL 学术 › J. Vinyl Addit. Technol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Epitaxial nucleation, modulated structure of molecular aggregation, and enhanced thermal degradation temperature of poly(ethylene adipate): Effects of the naturally occurring uracil as a nucleator
Journal of Vinyl and Additive Technology ( IF 3.8 ) Pub Date : 2021-07-06 , DOI: 10.1002/vnl.21847
Yubin Yang ₁ , Zhe Zhu ₁ , Zhanghua Xie ₂ , Fude Liu ₁ , Jing Yin ₁ , Xiaoyu Sun ₁ , Chunfeng Jia ₁ , Jinjun Yang ₁

Affiliation

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.

中文翻译：

聚（己二酸乙烯酯）的外延成核、分子聚集的调制结构和热降解温度的提高：天然尿嘧啶作为成核剂的影响

我们使用聚己二酸乙烯酯 (PEA) 和天然存在的尿嘧啶 (URA) 制造了一种新型生物复合材料，其中具有完全生物相容性和可降解性的 URA 作为成核剂 (NA)。在掺入 URA 后，PEA的结晶性、熔融结晶温度 ( T _c ) 和结晶速率明显提高，表明 URA 具有良好的 NA。PEA 的基本成核机制是外延成核，这归因于 PEA 和 URA 的晶格之间的极好的匹配。PEA 结晶相的羰基/酯链段和 URA 之间存在 H 键相互作用。随着 URA 的加载，羰基和酯均落在 CH _{2 之后}在 PEA 结晶过程中的分段重组中。PEA/1%URA在 TG 测量中显示出T _d的增强（即热降解稳定性增加），这主要归因于 URA 的阻燃效果。

更新日期：2021-07-06

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文