Influence of a Multiple Epoxy Chain Extender on the Rheological Behavior, Crystallization, and Mechanical Properties of Polyglycolic Acid
This study investigated the impact of a multiple epoxy chain extender (ADR) on the rheological behavior, crystallization, and mechanical properties of polyglycolic acid (PGA). Tests of the torque and melt mass flow rate and dynamic rheological analysis were conducted to study the rheological behavio...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-06-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/15/13/2764 |
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| author | Jianfeng Gao Kai Wang Nai Xu Luyao Li Zhao Ma Yipeng Zhang Kun Xiang Sujuan Pang Lisha Pan Tan Li |
| author_facet | Jianfeng Gao Kai Wang Nai Xu Luyao Li Zhao Ma Yipeng Zhang Kun Xiang Sujuan Pang Lisha Pan Tan Li |
| author_sort | Jianfeng Gao |
| collection | DOAJ |
| description | This study investigated the impact of a multiple epoxy chain extender (ADR) on the rheological behavior, crystallization, and mechanical properties of polyglycolic acid (PGA). Tests of the torque and melt mass flow rate and dynamic rheological analysis were conducted to study the rheological behavior of PGA modified with ADR. The rheological results of the modified PGA showed a significantly increased viscosity and storage modulus with an increase in the ADR amount, which could be attributed to the chain extension/branching reactions between PGA and ADR. It was proved that ADR could be used as an efficient chain extender for tailoring the rheological performance of PGA. The Han plot of the modified PGA showed a transition of viscous behavior to elastic behavior, while the ADR content was increased from 0 to 0.9 phr. The formation of long-chain branches (LCBs) was confirmed via the Cole–Cole plot and weighted relaxation spectrum, wherein the LCBs substantially changed the rheological behavior of the modified PGA. The vGP plots predicted a star-type topological structure for the LCBs. The results of non-isothermal crystallization kinetics suggested that the crystallization of the modified PGA was predominantly homogeneous nucleation and three-dimensional growth. The crystallinity decreased slightly with the increase in the ADR amount. Compared to neat PGA, the modified PGA samples exhibited better tensile and flexural performances. |
| first_indexed | 2024-03-11T01:31:08Z |
| format | Article |
| id | doaj.art-3ccf7d2966744c3699962529a084ef88 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-11T01:31:08Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-3ccf7d2966744c3699962529a084ef882023-11-18T17:19:44ZengMDPI AGPolymers2073-43602023-06-011513276410.3390/polym15132764Influence of a Multiple Epoxy Chain Extender on the Rheological Behavior, Crystallization, and Mechanical Properties of Polyglycolic AcidJianfeng Gao0Kai Wang1Nai Xu2Luyao Li3Zhao Ma4Yipeng Zhang5Kun Xiang6Sujuan Pang7Lisha Pan8Tan Li9School of Materials Science and Engineering, Hainan University, Haikou 570228, ChinaSchool of Materials Science and Engineering, Hainan University, Haikou 570228, ChinaSchool of Materials Science and Engineering, Hainan University, Haikou 570228, ChinaSchool of Materials Science and Engineering, Hainan University, Haikou 570228, ChinaSchool of Materials Science and Engineering, Hainan University, Haikou 570228, ChinaSchool of Materials Science and Engineering, Hainan University, Haikou 570228, ChinaSchool of Materials Science and Engineering, Hainan University, Haikou 570228, ChinaSchool of Science, Hainan University, Haikou 570228, ChinaSchool of Chemical Engineering and Technology, Hainan University, Haikou 570228, ChinaShiner National and Local Joint Engineering and Research Center, Shiner Industrial Co., Ltd., Haikou 570228, ChinaThis study investigated the impact of a multiple epoxy chain extender (ADR) on the rheological behavior, crystallization, and mechanical properties of polyglycolic acid (PGA). Tests of the torque and melt mass flow rate and dynamic rheological analysis were conducted to study the rheological behavior of PGA modified with ADR. The rheological results of the modified PGA showed a significantly increased viscosity and storage modulus with an increase in the ADR amount, which could be attributed to the chain extension/branching reactions between PGA and ADR. It was proved that ADR could be used as an efficient chain extender for tailoring the rheological performance of PGA. The Han plot of the modified PGA showed a transition of viscous behavior to elastic behavior, while the ADR content was increased from 0 to 0.9 phr. The formation of long-chain branches (LCBs) was confirmed via the Cole–Cole plot and weighted relaxation spectrum, wherein the LCBs substantially changed the rheological behavior of the modified PGA. The vGP plots predicted a star-type topological structure for the LCBs. The results of non-isothermal crystallization kinetics suggested that the crystallization of the modified PGA was predominantly homogeneous nucleation and three-dimensional growth. The crystallinity decreased slightly with the increase in the ADR amount. Compared to neat PGA, the modified PGA samples exhibited better tensile and flexural performances.https://www.mdpi.com/2073-4360/15/13/2764polyglycolic acidchain extenderrheologynon-isothermal crystallizationmechanical properties |
| spellingShingle | Jianfeng Gao Kai Wang Nai Xu Luyao Li Zhao Ma Yipeng Zhang Kun Xiang Sujuan Pang Lisha Pan Tan Li Influence of a Multiple Epoxy Chain Extender on the Rheological Behavior, Crystallization, and Mechanical Properties of Polyglycolic Acid Polymers polyglycolic acid chain extender rheology non-isothermal crystallization mechanical properties |
| title | Influence of a Multiple Epoxy Chain Extender on the Rheological Behavior, Crystallization, and Mechanical Properties of Polyglycolic Acid |
| title_full | Influence of a Multiple Epoxy Chain Extender on the Rheological Behavior, Crystallization, and Mechanical Properties of Polyglycolic Acid |
| title_fullStr | Influence of a Multiple Epoxy Chain Extender on the Rheological Behavior, Crystallization, and Mechanical Properties of Polyglycolic Acid |
| title_full_unstemmed | Influence of a Multiple Epoxy Chain Extender on the Rheological Behavior, Crystallization, and Mechanical Properties of Polyglycolic Acid |
| title_short | Influence of a Multiple Epoxy Chain Extender on the Rheological Behavior, Crystallization, and Mechanical Properties of Polyglycolic Acid |
| title_sort | influence of a multiple epoxy chain extender on the rheological behavior crystallization and mechanical properties of polyglycolic acid |
| topic | polyglycolic acid chain extender rheology non-isothermal crystallization mechanical properties |
| url | https://www.mdpi.com/2073-4360/15/13/2764 |
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