Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Mechanical Properties and Non-isothermal Crystallization Kinetics of Polylactic Acid Modified by Polyacrylic Elastomer and Cellulose Nanocrystalline

Weixiao Meng
,
Xiaojie Zhang
ORCID logo ,
Xiuli Hu
ORCID logo ,
Yingchun Liu
,
Jimin Zhang
* ,
Xiongwei Qu
* ,
Beckry Abdel-Magid
*
Version 1 : Received: 10 August 2023 / Approved: 11 August 2023 / Online: 11 August 2023 (09:39:28 CEST)

A peer-reviewed article of this Preprint also exists.

Meng, W.; Zhang, X.; Hu, X.; Liu, Y.; Zhang, J.; Qu, X.; Abdel-Magid, B. Mechanical Properties and Non-Isothermal Crystallization Kinetics of Polylactic Acid Modified by Polyacrylic Elastomers and Cellulose Nanocrystals. Polymers 2023, 15, 3767. Meng, W.; Zhang, X.; Hu, X.; Liu, Y.; Zhang, J.; Qu, X.; Abdel-Magid, B. Mechanical Properties and Non-Isothermal Crystallization Kinetics of Polylactic Acid Modified by Polyacrylic Elastomers and Cellulose Nanocrystals. Polymers 2023, 15, 3767.

Abstract

In this paper, a polyacrylic elastomer latex with butyl acrylate (BA) as the core and methyl methacrylate (MMA) copolymerized with glycidyl methacrylate (GMA) as the shell, named poly(BA-MMA-GMA) (PBMG), was synthesized by seeded emulsion polymerization. Cellulose nanocrystal (CNC) was dispersed in the polyacrylic latex to prepare PBMG/CNC dispersions with different CNC contents. The dried product was mixed with polylactic acid (PLA) to fabricate PLA/PBMG/CNC blends. The addition of PBMG and PBMG/CNC improved the mechanical properties of the PLA matrix. Differential scanning calorimetry (DSC) was used to investigate the non-isothermal crystallization kinetics. The Avrami equation modified by Jeziorny, and the Ozawa, and Mo’s equations were used to analyze the nonisothermal crystallization kinetics of PLA and its blends. Analysis of crystallization halftime of nonisothermal conditions indicated that the overall rate of crystallization increased significantly at 1 wt% content of CNC. This seemed to result from the increase of nucleation density and the acceleration of segment movement in the presence of CNC component. This phenomenon was verified by polarizing microscope observation.

Keywords

polylactic acid; polyacrylic elastomer; cellulose nanocrystal; nonisothermal crystallization kinetics; Fabrication technique

Subject

Chemistry and Materials Science, Polymers and Plastics

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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