Influence of the Pre‐Intercalated Alkyl Chain Length of Nano‐Montmorillonite on the Dielectric Relaxation and Degradation Behavior of PBAT Composites
Source abstract
Abstract
ABSTRACT The successful pre‐intercalation of ammonium salts with alkyl chain lengths ranging from C10 to C22 into nano‐montmorillonite (MMT) significantly increases the interlayer spacing. After melt blending, the distribution of organically modified MMT in the PBAT matrix improves with the increase in the length of the pre‐intercalated alkyl chains. Broad dielectric relaxation spectroscopy (BDRS) reveals that the length of the pre‐intercalated chains has minimal effect on the glass transition temperature ( T g ). Furthermore, the α‐relaxation transitions to lower temperatures with an increase in the length of the pre‐intercalated chains, demonstrating the plasticization of rigid amorphous regions driven by alkyl chain mobility. Hydrolysis degradation analysis reveals that PBAT/MMT with C22 exhibits the slowest degradation rate, as dispersion effects effectively suppress water diffusion through the composite films by prolonging the effective diffusion pathways. These findings highlight the critical role of pre‐intercalated chain length in modulating the molecular dynamics and degradability of PBAT/MMT composite films.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Polymer Nanocomposites and Properties · Conducting polymers and applications · biodegradable polymer synthesis and properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Materials Science and Engineering Taiyuan University of Technology Taiyuan China
Department of Polymer Science and Engineering Zhejiang University Hangzhou China
Funding
Shanxi Provincial Key Research and Development Project · National Natural Science Foundation of China
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