The nucleation effect of N,N′-bis(benzoyl) alkyl diacid dihydrazides on crystallization of biodegradable poly(l-lactic acid)

Cai, Yan‐Hua; Yan, Shifeng; Fan, Yinqing; Yu, Zhiqiang; Chen, Xuesi; Yin, Jingbo

doi:10.1007/s13726-012-0046-x

Cited by 31 publications

(20 citation statements)

References 30 publications

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“…4, PLLA decomposes fast and completes in one stage above 300 ºC. The main degradation products of PLLA are oligomers together with some lactide, but there are also other volatile products such as acetaldehyde, carbon dioxide, carbon monoxide and ketene 10 . As to sodium alginate, there exists more than two decomposition stages and the onset decomposition temperature is low.…”

Section: Resultsmentioning

confidence: 99%

Thermal and Mechanical Properties of Poly(L-Lactic Acid) Composities Based on Sodium Alginate

Zhao¹,

Cai²

2013

Asian J. Chem.

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Section: Resultsmentioning

confidence: 99%

Thermal and Mechanical Properties of Poly(L-Lactic Acid) Composities Based on Sodium Alginate

Zhao¹,

Cai²

2013

Asian J. Chem.

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“…Acid Dihydrazide. N,N,N -Tris(benzoyl) trimesic acid dihydrazide (TTAD) was prepared as shown in Scheme 1; the specific reaction process is similar to the other amide compounds reportedin our previous works [12,13].…”

Section: Synthesis Of Nnn -Tris(benzoyl) Trimesicmentioning

confidence: 89%

“…Upon the addition of 2% 1,1 -(ethane-1,2-diyl)bis(3-phenylurea), the melt-crystallization enthalpy of PLLA increased from almost 0 to 31.2 J/g, and the isothermal crystallization rate increased by 10.5 times at 140 ∘ C. Furthermore, ethylene bis-stearamide [10] and benzenetricarboxylamide derivatives [11] nucleating agents showed dramatic increases in crystallization rate of PLLA. In our previous work [12], five N,N -bis(benzoyl) alkyl diacid dihydrazides with bisamides acted as powerful nucleating agent for PLLA. Among them, N,N -bis(benzoyl) suberic acid dihydrazide has higher nucleating activity than the other N,N -bis(benzoyl) alkyl diacid dihydrazides.…”

Section: Introductionmentioning

confidence: 99%

The Crystallization, Melting Behavior, and Thermal Stability of Poly(L-lactic acid) Induced byN,N,N′-Tris(benzoyl) Trimesic Acid Hydrazide as an Organic Nucleating Agent

Cai

Zhang

2014

Advances in Materials Science and Engineering

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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 and1H 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−1to 33.44 J·g−1at 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.

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“…Blending of PLLA and starch dried in a vacuum oven for 48 h was performed on a counter-rotating mixer, and the similar details of the preparation process of PLLA/starch composites were described in our earlier work [9,10].…”

Section: Preparation Of Plla/starch Compositesmentioning

confidence: 99%

Preparation and Physical Performance of Green Poly(L-lactic acid) Composition by Blending with Starch

Cai¹,

Zheng²,

Guo³

2017

TOMSJ

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Objective:To develop more green polymer composites and further know the performance of green composites, the composites based on green poly(L-lactic acid) (PLLA) and starch were fabricated by a counter-rotating mixer. And effect of starch on the fluidity and nucleating performance of PLLA was investigated using melt index instrument, optical depolarizer and wide angle X-ray diffraction instrument, respectively. Method and Conclusion:The fluidity of PLLA/starch composites showed that, compared to the neat PLLA, the addition of starch made the fluidity of PLLA increase significantly and the melt mass flow rate of PLLA/5%starch sample had the maximum value 13.36 g/10min. In addition, the introduction of starch could also increase the crystallization rate of PLLA through isothermal crystallization measurement and x-ray diffraction analysis, the maximum value of crystallization rate of PLLA/starch composites appeared in low crystallization temperature zone, and 10 wt% starch could make the t1/2 of PLLA decrease from 3999.4s to 421.4s.

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The nucleation effect of N,N′-bis(benzoyl) alkyl diacid dihydrazides on crystallization of biodegradable poly(l-lactic acid)

Cited by 31 publications

References 30 publications

Thermal and Mechanical Properties of Poly(L-Lactic Acid) Composities Based on Sodium Alginate

Thermal and Mechanical Properties of Poly(L-Lactic Acid) Composities Based on Sodium Alginate

The Crystallization, Melting Behavior, and Thermal Stability of Poly(L-lactic acid) Induced byN,N,N′-Tris(benzoyl) Trimesic Acid Hydrazide as an Organic Nucleating Agent

Preparation and Physical Performance of Green Poly(L-lactic acid) Composition by Blending with Starch

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