Mechanical Properties and Non-Isothermal Crystallization Kinetics of Polylactic Acid Modified by Polyacrylic Elastomers and Cellulose Nanocrystals

被引：2
作者：
Meng, Weixiao [1 ]
Zhang, Xiaojie [1 ]
Hu, Xiuli [1 ]
Liu, Yingchun [2 ]
Zhang, Jimin [1 ]
Qu, Xiongwei [1 ]
Abdel-Magid, Beckry [3 ]
机构：
[1] Hebei Univ Technol, Sch Chem Engn, Hebei Key Lab Funct Polymers, Tianjin 300130, Peoples R China
[2] Jinghua Plast Ind Co Ltd, Langfang 065800, Peoples R China
[3] Winona State Univ, Dept Composite Mat Engn, Winona, MN 55987 USA
来源：
POLYMERS | 2023年 / 15卷 / 18期
基金：
中国国家自然科学基金;
关键词：
polylactic acid; polyacrylic elastomer; cellulose nanocrystal; non-isothermal crystallization kinetics; fabrication technique; POLY(LACTIC ACID); FIBER; MELT; PERFORMANCE; MORPHOLOGY; TOUGHNESS; STRENGTH; BEHAVIOR; SILICA; FILMS;
D O I：
10.3390/polym15183767
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
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 the Jeziorny, Ozawa and Mo equations was used to analyze the non-isothermal crystallization kinetics of PLA and its blends. Analysis of the crystallization halftime of non-isothermal 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 the CNC component. This phenomenon was verified by polarizing microscope observation.
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页数：16
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