The Crystallization, Melting Behavior, and Thermal Stability of Poly(L-lactic acid) Induced by N,N,N′-Tris(benzoyl) Trimesic Acid Hydrazide as an Organic Nucleating Agent
N,N,N′-Tris(benzoyl) trimesic acid hydrazide (TTAD), as a novel nucleating agent of poly(L-lactic acid) (PLLA), was synthesized and characterized by FT-IR and 1H NMR. The crystallization, melting behavior, and thermal stability of PLLA induced by TTAD were investigated through DSC, TGA, depolarized-...
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Wiley
2014-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2014/843564 |
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| author | Yan-Hua Cai Yan-Hua Zhang |
| author_facet | Yan-Hua Cai Yan-Hua Zhang |
| author_sort | Yan-Hua Cai |
| collection | DOAJ |
| description | N,N,N′-Tris(benzoyl) trimesic acid hydrazide (TTAD), as a novel nucleating agent of poly(L-lactic acid) (PLLA), was synthesized and characterized by FT-IR and 1H NMR. The crystallization, melting behavior, and thermal stability of PLLA induced by TTAD were investigated through DSC, TGA, depolarized-light intensity measurement, and so forth. The crystallization behavior indicated that the presence of TTAD accelerated the overall PLLA crystallization. Compared to neat PLLA, the crystallization onset temperature of PLLA/1%TTAD increased from 101.36°C to 125.26°C, the melt-crystallization peak temperature increased from 94.49°C to 117.56°C, crystallization enthalpy increased from 0.1023 J·g−1 to 33.44 J·g−1 at a cooling rate of 1°C/min from melt, and the crystallization half-time of PLLA/TTAD decreased from 2997.2 s to 108.9 s at 110°C. Moreover, the nonisothermal crystallization measurements also indicated that the crystallization peak became wider and shifted to a lower temperature with increasing cooling rate. With the presence of TTAD, the melting behavior of PLLA was affected significantly, and a double-melting peak occurred due to melting-recrystallization. Thermal stability research showed that there existed one degradation stage of PLLA and PLLA/TTAD samples, and the thermal degradation temperature of PLLA/TTAD decreased compared to neat PLLA. |
| format | Article |
| id | doaj-art-f38bae44e4054885b1293691c8d03693 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
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| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-f38bae44e4054885b1293691c8d036932025-02-03T01:10:31ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422014-01-01201410.1155/2014/843564843564The Crystallization, Melting Behavior, and Thermal Stability of Poly(L-lactic acid) Induced by N,N,N′-Tris(benzoyl) Trimesic Acid Hydrazide as an Organic Nucleating AgentYan-Hua Cai0Yan-Hua Zhang1Chongqing Key Laboratory of Environmental Materials & Remediation Technologies, Chongqing University of Arts and Sciences, Yongchuan, Chongqing 402160, ChinaChongqing Key Laboratory of Environmental Materials & Remediation Technologies, Chongqing University of Arts and Sciences, Yongchuan, Chongqing 402160, ChinaN,N,N′-Tris(benzoyl) trimesic acid hydrazide (TTAD), as a novel nucleating agent of poly(L-lactic acid) (PLLA), was synthesized and characterized by FT-IR and 1H NMR. The crystallization, melting behavior, and thermal stability of PLLA induced by TTAD were investigated through DSC, TGA, depolarized-light intensity measurement, and so forth. The crystallization behavior indicated that the presence of TTAD accelerated the overall PLLA crystallization. Compared to neat PLLA, the crystallization onset temperature of PLLA/1%TTAD increased from 101.36°C to 125.26°C, the melt-crystallization peak temperature increased from 94.49°C to 117.56°C, crystallization enthalpy increased from 0.1023 J·g−1 to 33.44 J·g−1 at a cooling rate of 1°C/min from melt, and the crystallization half-time of PLLA/TTAD decreased from 2997.2 s to 108.9 s at 110°C. Moreover, the nonisothermal crystallization measurements also indicated that the crystallization peak became wider and shifted to a lower temperature with increasing cooling rate. With the presence of TTAD, the melting behavior of PLLA was affected significantly, and a double-melting peak occurred due to melting-recrystallization. Thermal stability research showed that there existed one degradation stage of PLLA and PLLA/TTAD samples, and the thermal degradation temperature of PLLA/TTAD decreased compared to neat PLLA.http://dx.doi.org/10.1155/2014/843564 |
| spellingShingle | Yan-Hua Cai Yan-Hua Zhang The Crystallization, Melting Behavior, and Thermal Stability of Poly(L-lactic acid) Induced by N,N,N′-Tris(benzoyl) Trimesic Acid Hydrazide as an Organic Nucleating Agent Advances in Materials Science and Engineering |
| title | The Crystallization, Melting Behavior, and Thermal Stability of Poly(L-lactic acid) Induced by N,N,N′-Tris(benzoyl) Trimesic Acid Hydrazide as an Organic Nucleating Agent |
| title_full | The Crystallization, Melting Behavior, and Thermal Stability of Poly(L-lactic acid) Induced by N,N,N′-Tris(benzoyl) Trimesic Acid Hydrazide as an Organic Nucleating Agent |
| title_fullStr | The Crystallization, Melting Behavior, and Thermal Stability of Poly(L-lactic acid) Induced by N,N,N′-Tris(benzoyl) Trimesic Acid Hydrazide as an Organic Nucleating Agent |
| title_full_unstemmed | The Crystallization, Melting Behavior, and Thermal Stability of Poly(L-lactic acid) Induced by N,N,N′-Tris(benzoyl) Trimesic Acid Hydrazide as an Organic Nucleating Agent |
| title_short | The Crystallization, Melting Behavior, and Thermal Stability of Poly(L-lactic acid) Induced by N,N,N′-Tris(benzoyl) Trimesic Acid Hydrazide as an Organic Nucleating Agent |
| title_sort | crystallization melting behavior and thermal stability of poly l lactic acid induced by n n n tris benzoyl trimesic acid hydrazide as an organic nucleating agent |
| url | http://dx.doi.org/10.1155/2014/843564 |
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