Effect of synthesized sulfonate derivatives as nucleating agents on crystallization behavior of poly(lactic acid)

IF 1.8 4区化学 Q3 POLYMER SCIENCE

Designed Monomers and Polymers Pub Date : 2022-05-06 DOI:10.1080/15685551.2022.2072697

Pasawat Jongpanya-Ngam, R. Khankrua, M. Seadan, S. Suttiruengwong

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引用次数: 2

Abstract

ABSTRACT The improvement of the crystallization of poly(lactic acid) (PLA) is one of the key areas to allow PLA to perform better at higher temperature and load bearing. Due to its slow crystallization rate, either organic or inorganic nucleating agents (NAs) can be used to improve the crystallization rate of PLA. In the case of organic NAs, aromatic sulfonate salt and bisamide compounds are promising ones because they can control better clarity. The aim of this work was to study the crystallization behavior of PLA using as-synthesized dimethyl 5-sulfoisophthalate sodium salt (SSIPA) as a nucleating agent in comparison with the commercial sulfonate salt (LAK-301). Two grades of PLA (PLA L105 and PLA 3251D) were used in this study. PLA samples were prepared by internal mixer and compression molding. All samples were investigated by DSC and POM. The results from DSC showed that after introducing the nucleating agents into PLA, the crystallinity in all samples was improved. The highest crystallinity at 57.48% was obtained from PLA L105/SSIPA1.0. Isothermal crystallization kinetics showed the improvement in overall crystallization rate of PLA with nucleating agents. The lowest half time crystallization obtained was 1.19 min for PLA L105/SSIPA1.0 at 135 °C. The results from POM indicated the substantial increase of the nucleus density and smaller spherulite size upon adding nucleating agents.

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合成磺酸酯衍生物作为成核剂对聚乳酸结晶行为的影响

摘要改善聚乳酸（PLA）的结晶性能是使PLA在更高的温度和负载下表现更好的关键领域之一。有机或无机成核剂（NAs）由于结晶速率慢，可以用来提高PLA的结晶速率。在有机NAs的情况下，芳香磺酸盐和双酰胺化合物是有前途的，因为它们可以控制更好的清晰度。本工作的目的是研究以合成的5-磺基间苯二甲酸二甲酯钠盐（SSIPA）为成核剂的PLA与商业磺酸盐（LAK-301）的结晶行为。本研究使用了两种等级的PLA（PLA L105和PLA 3251D）。PLA样品采用密炼机和模压法制备。通过DSC和POM对所有样品进行了研究。DSC结果表明，在PLA中引入成核剂后，所有样品的结晶度都有所提高。PLA L105/SIPA1.0的结晶度最高，为57.48%。等温结晶动力学表明，加入成核剂后PLA的总结晶速率有所提高。PLA L105/SIPA1.0在135°C下获得的最低半衰期结晶为1.19分钟。POM的结果表明，加入成核剂后，晶核密度显著增加，球晶尺寸减小。

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来源期刊

Designed Monomers and Polymers 化学-高分子科学

CiteScore

3.30

自引率

0.00%

发文量

审稿时长

2.1 months

期刊介绍： Designed Monomers and Polymers ( DMP) publishes prompt peer-reviewed papers and short topical reviews on all areas of macromolecular design and applications. Emphasis is placed on the preparations of new monomers, including characterization and applications. Experiments should be presented in sufficient detail (including specific observations, precautionary notes, use of new materials, techniques, and their possible problems) that they could be reproduced by any researcher wishing to repeat the work. The journal also includes macromolecular design of polymeric materials (such as polymeric biomaterials, biomedical polymers, etc.) with medical applications. DMP provides an interface between organic and polymer chemistries and aims to bridge the gap between monomer synthesis and the design of new polymers. Submssions are invited in the areas including, but not limited to: -macromolecular science, initiators, macroinitiators for macromolecular design -kinetics, mechanism and modelling aspects of polymerization -new methods of synthesis of known monomers -new monomers (must show evidence for polymerization, e.g. polycondensation, sequential combination, oxidative coupling, radiation, plasma polymerization) -functional prepolymers of various architectures such as hyperbranched polymers, telechelic polymers, macromonomers, or dendrimers -new polymeric materials with biomedical applications