Melting temperature, concentration and cooling rate-dependent nucleating ability of a self-assembly aryl amide nucleator on poly(lactic acid) crystallization

Kong, Weili; Zhu, Bo; Su, Fengmei; Wang, Zhen; Shao, Chunguang; Wang, Yaming; Liu, Chuntai; Shen, Changyu

doi:10.1016/j.polymer.2019.02.019

Cited by 44 publications

(25 citation statements)

References 45 publications

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“…Adding nucleation agent is a facile approach to promote PLA crystallization 5,11–22 . Self‐assembly nucleators such as N,N′,N″‐tricyclohexyl‐1,3,5‐benzenetricarboxylamide (BTCA), 17–20 N,N′‐bis(benzoyl) hexanedioic acid dihydrazide 21 and oxalamide derivatives 22 have revealed interesting effect on PLA crystallization. The nucleators can dissolve into PLA melt upon heating; while during subsequent cooling, they self‐assemble into supermolecular frameworks and guiding the formation of various crystal morphologies of PLA including cone‐like, shish‐kebab, and needle‐like structures 17,20 .…”

Section: Recent Advances In Pla Crystallizationmentioning

confidence: 99%

Crystallization behavior of poly(lactic acid) and its blends

Wang¹,

Liu²,

Shen³

2020

Polymer Crystallization

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Poly(lactic acid) (PLA) is one of the most interesting bio‐based biodegradable alternatives, with great promise to replace petroleum‐based plastics. However, the intrinsic slow crystallization ability of PLA restricts its extensive applications. In this perspective, we highlight some recent advances in PLA crystallization, including nucleation by self‐assembly nucleating agents, self‐nucleation (or memory effect), conformational ordering in the very early stage of crystallization, crystal nucleation investigated by fast scanning calorimetry (Flash DSC), crystallization under flow, and pressure fields, and crystallization of enantiomeric blends. Finally, major challenges and future perspectives are proposed.

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Section: Recent Advances In Pla Crystallizationmentioning

confidence: 99%

Crystallization behavior of poly(lactic acid) and its blends

Wang¹,

Liu²,

Shen³

2020

Polymer Crystallization

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“…Improving the crystallinity of PLA has been confirmed to be conducive to the improvement of its mechanical properties . As heterogeneous nucleating points, SiO 2 nanoparticles have also been proved to help the crystallization of polymers .…”

Section: Resultsmentioning

confidence: 97%

Simultaneously reinforcing and toughening poly(lactic acid) by incorporating reactive melt‐functionalized silica nanoparticles

Wang

Zhang

et al. 2019

J of Applied Polymer Sci

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Simultaneously reinforcing and toughening poly(lactic acid) (PLA) was carried out by adding a small amount of functionalized SiO2 (f‐SiO2) with grafting degraded PLA chains in this work. Typically, the high shear force and high temperature condition of melt blending were employed to accelerate the degradation of PLA and graft the degraded PLA chains onto SiO2.The structure characterizations revealed that large quantity of degraded PLA chains were grafted onto the surface of SiO2 by transesterification, condensation, and esterification reactions during melt blending. Due to the improvement in dispersion and interfacial interaction in PLA matrix, the f‐SiO2 exhibited an effective reinforcing and toughening effect for PLA, where the tensile strength, elongation at break, and impact toughness of PLA/f‐SiO2 nanocomposite increased by 14.9, 47.8, and 30.3% compared to neat PLA. Besides, the degree of crystallinity of PLA was significantly improved by the added f‐SiO2, which also contributed to improving mechanical properties. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48834.

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“…Figure 3. DSC curves of PLLA/CABH samples from the melt of 190°C at various cooling rates For actual production, exploring the optimum processing temperature combination is meaningful due to the distinct effect of the final melting temperature (Tf) on the crystallization behavior as reported [42,45,46]. For the organic additive, the Tf can directly affect the solubility of CABH in PLLA matrix and influences the amount of undissolved BACH.…”

Section: Non-isothermal Crystallizationmentioning

confidence: 99%

Physical Properties of Biodegradable Poly(L-lactide) Induced by N, N -Bis(Benzoyl) 1, 3-Cyclohexanedicarboxylic Acid Dihydrazide as Crystallinity Additive

Zhao¹,

Deng²,

Qiao³

et al. 2021

Mater. Plast.

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This work is aimed at synthesizing an organic compound N, N -bis(benzoyl) 1,3-cyclohexane-dicarboxylic acid dihydrazide (CABH) to focus on its effect on the non-isothermal crystallization of poly(L-lactide) (PLLA), meanwhile the melting behavior, thermal decomposition process and optical property of PLLA/CABH samples in different CABH concentrations were also investigated. It was found that CABH acted as efficient heterogeneous nucleating agent for inducing PLLA�s crystallization through comparative analysis of melt-crystallization process of the virgin PLLA with PLLA/CABH samples, and a high amount of CABH played a much more significant role in promoting PLLA�s crystallization. Additionally, the melt-crystallization processes also showed that both the cooling rate and the final melting temperature affected the crystallization behavior of PLLA, an increase of cooling rate could weaken the crystallization ability of PLLA/CABH samples, and the final melting temperature of 180�C made PLLA/CABH exhibit the best crystallization ability. For the cold-crystallization process, the cold-crystallization peak became flatter and shifted toward the lower temperature with increasing of CABH concentration, but an increase of heating rate could prevent the cold-crystallization peak from moving to low temperature because of the thermal inertia. The melting behaviors of PLLA/CABH depended on the previous crystallization and heating rate in heating, and the difference in melting behavior of PLLA/CABH samples effectively reflected the nucleation role of CABH, as well as the double melting peaks behavior of PLLA/CABH was thought to due to the melting-recrystallization. The introduction of CABH led to a drop in light transmittance, moreover, this negative effect were more obvious with an increase of CABH loading. In contrast, the fluidity of PLLA was significantly enhanced due to the existence of CABH.

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Melting temperature, concentration and cooling rate-dependent nucleating ability of a self-assembly aryl amide nucleator on poly(lactic acid) crystallization

Cited by 44 publications

References 45 publications

Crystallization behavior of poly(lactic acid) and its blends

Crystallization behavior of poly(lactic acid) and its blends

Simultaneously reinforcing and toughening poly(lactic acid) by incorporating reactive melt‐functionalized silica nanoparticles

Physical Properties of Biodegradable Poly(L-lactide) Induced by N, N -Bis(Benzoyl) 1, 3-Cyclohexanedicarboxylic Acid Dihydrazide as Crystallinity Additive

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