Non-isothermal crystallization behaviors and spherulitic morphology of poly(lactic acid) nucleated by a novel nucleating agent

Li, Chenglang; Dou, Qiang; Bai, Zhifei; Lu, Qianyun

doi:10.1007/s10973-015-4677-y

Cited by 55 publications

(25 citation statements)

References 65 publications

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“…It is reflected in the enhanced thermal stability of polymer matrix. In other work, cadmium phenylmalonate (PMA-Cd) was used as an inorganic filler for PLA [13]. The results showed that PMA-Cd accelerated the crystallization rate of PLA.…”

Section: Introductionmentioning

confidence: 98%

Supermolecular structure and nucleation ability of polylactide-based composites with silica/lignin hybrid fillers

Grząbka-Zasadzińska

Kłapiszewski

Bula

et al. 2016

J Therm Anal Calorim

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In this paper, amorphous silica Syloid 244 and kraft lignin were mechanically coupled. Four hybrid materials containing silica and lignin in ratios 1:1, 2:1, 5:1 and 20:1 were prepared. As reference samples for hybrid fillers pristine silica and lignin were used. Particle size determination and microscopic observations were applied to determine dispersive and morphological properties of hybrid fillers. Fourier transform infrared spectroscopy confirmed the effective preparation of silica/lignin hybrid materials. The parameters of porous structure of examined hybrid filler were determined using the multipoint Brunauer-Emmett-Teller method and Barrett-Joyner-Halenda algorithm. Composite samples of polylactide (PLA) containing 2.5 % (w/w) of hybrid filler were extruded. Optical microscopy, wide-angle X-ray scattering and differential scanning calorimetry were applied to specify the supermolecular structure of functional PLA/hybrid composites and analyze the crystallization parameters as well as the phase transformation in PLA matrix. Silica/lignin hybrid material was found to be a filler capable of an effective crystal nucleation. The nucleating ability of silica/lignin hybrid filler in PLA matrix is related to porous properties of filler and its composition.

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Section: Introductionmentioning

confidence: 98%

Supermolecular structure and nucleation ability of polylactide-based composites with silica/lignin hybrid fillers

Grząbka-Zasadzińska

Kłapiszewski

Bula

et al. 2016

J Therm Anal Calorim

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“…Thus, normal industrial processing conditions result in low crystallinity. The incorporation of nucleating agents can significantly increase the rate of crystallization and can cause PLA to achieve a higher crystallinity during industrial processing [3][4][5][6][7]. Although there are several types of nucleating agents known for PLA the development of an environmentally friendly and a biocompatible, nucleating agent is highly desired to expand its applications.…”

Section: Introductionmentioning

confidence: 99%

Lignin-coated cellulose nanocrystals as promising nucleating agent for poly(lactic acid)

Gupta

Simmons

Schueneman

et al. 2016

J Therm Anal Calorim

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We report the effect of lignin-coated cellulose nanocrystals (L-CNCs) on the crystallization behavior of poly(lactic acid) (PLA). PLA/L-CNC nanocomposites were prepared by melt mixing, and the crystallization behavior of PLA was investigated using differential scanning calorimetry. Isothermal crystallization data were analyzed using Avrami and Lauritzen-Hoffman secondary nucleation theory, while the equilibrium melting temperature was determined using the nonlinear Hoffman-Weeks method. The lignin-coated cellulose nanocrystals acted as a nucleating agent and significantly increased the rate of crystallization and degree of crystallinity of PLA in PLA/ L-CNC nanocomposites. The Avrami exponent, n, increased in the presence of L-CNCs, displaying a conversion from lamellar morphology to two-dimensional crystal growth. PLA/L-CNC nanocomposites also gave lower values of the nucleation parameters, K g and r e , due to a reduction in the activation energy for nucleation.

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“…Many semi-crystalline polymers show multiple melting peaks due to bimodal crystal distributions produced by annealing, reorganization and recrystallization, polymorphism and different molecular weight species [52]. This phenomenon is also found for neat PLA and PLA blends and composites in the literatures [3,7,8,9,18,23,25,27,31,33,38,39]. The WAXD spectra (Figure 7) indicate that only one crystalline modification was developed in the samples and the double melting peak seen in the DSC heating run may reflect the melting of crystalline regions of various sizes and perfection.…”

Section: Resultsmentioning

confidence: 85%

Investigation on Polylactide (PLA)/Poly(butylene adipate-co-terephthalate) (PBAT)/Bark Flour of Plane Tree (PF) Eco-Composites

Dou

Cai

2016

Materials

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Polylactide (PLA)/poly(butylene adipate-co-terephthalate) (PBAT)/bark flour of plane tree (PF) eco-composites were prepared via melt blending. The morphologies, mechanical properties, crystal structures and melting and crystallization behaviors of the eco-composites were investigated by means of scanning electron microscopy (SEM), mechanical tests, polarized light microscopy (PLM), wide angle X-ray diffraction (WAXD) and differential scanning calorimetry (DSC), respectively. It is shown that the interfacial adhesion between PLA matrix and PF is weak and the mechanical properties of PLA/PF eco-composites are poor. The titanate treatment improves the adhesion between the matrix and the filler and enhances the stiffness of the eco-composites. The toughness is improved by PBAT and ductile fractured surfaces can be found. The spherulitic size of PLA is decreased by the addition of PF. The α crystalline form of PLA remains in the composites. Compared with PF, T-PF (PF treated by a titanate coupling agent) and PBAT have negative effects on the crystallization of PLA.

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Non-isothermal crystallization behaviors and spherulitic morphology of poly(lactic acid) nucleated by a novel nucleating agent

Cited by 55 publications

References 65 publications

Supermolecular structure and nucleation ability of polylactide-based composites with silica/lignin hybrid fillers

Supermolecular structure and nucleation ability of polylactide-based composites with silica/lignin hybrid fillers

Lignin-coated cellulose nanocrystals as promising nucleating agent for poly(lactic acid)

Investigation on Polylactide (PLA)/Poly(butylene adipate-co-terephthalate) (PBAT)/Bark Flour of Plane Tree (PF) Eco-Composites

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