The crystallization behavior of poly(lactic acid) with different types of nucleating agents

Feng, Yongqi; Ma, Piming; Xu, Pengwu; Wang, Ruyin; Dong, Weifu; Chen, Mingqing; Joziasse, Cornelis A.P.

doi:10.1016/j.ijbiomac.2017.08.095

Cited by 93 publications

(66 citation statements)

References 40 publications

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“…The amorphous parts of PLA will soften when the ambient temperature reaches its glass transition temperature ( T g , around 60 °C), and only the PLA crystal region melting at around 170 °C can withstand the high temperature . Therefore, increasing the crystallinity of PLA is the key to enhance its heat resistance, which can be effectively realized by annealing treatment above the T g of PLA . For example, the HDT of the PLA/EGMA blend was increased from 54.2 to 61.0 °C (under the loading stress of 1.8 MPa) with an annealing treatment at 90 °C for 2.5 h …”

Section: Introductionsupporting

confidence: 74%

Super‐Toughened Heat‐Resistant Poly(lactic acid) Alloys By Tailoring the Phase Morphology and the Crystallization Behaviors

Yang

et al. 2020

Journal of Polymer Science

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The interfacial grafting copolymerization and the compatibility between poly(lactic acid) (PLA) and ethylene-vinyl acetate-glycidyl methacrylate elastomer (EVM-GMA) are adjusted by varying the blending temperatures. High temperature is favored to the grafting reaction between epoxy groups of the EVM-GMA and terminal groups of the PLA, resulting in better compatibility between the two components. Taking PLA/EVM-GMA (80/20) blend as an example, an increase in blending temperature from 175 to 230 C led to a 42.8% reduction in EVM-GMA particle size, and consequently 137.8% and 52.6% increases in elongation at break (Eb) and notched impact strength (NIS), respectively. In comparison, the Eb and NIS of PLA/EVM blends without any interfacial reaction deteriorated dramatically due to thermal degradation of the PLA at high(er) temperatures. Furthermore, the PLA/EVM-GMA blend prepared at 230 C possesses both excellent toughness (Eb > 60%, NIS > 60 kJ m −2 ) and high heat deflection temperature (>90 C) after annealing at 100 C. This work provides a new approach in designing highperformance biobased materials which may broaden the application range of PLA in engineering areas.Although reactive blending with elastomers has been reported as an effective method for toughening of PLA, the effect of blending temperature, that is, the extent of in situ grafting reactions on the mechanical properties of PLA/elastomer blends has rarely been studied. The higher the blending temperature is, the higher reaction extent and compatibilization between PLA and elastomer. However, it may also lead to thermal degradation of PLA matrix, which is not conducive to the final mechanical performances (e.g., tensile strength).Additional supporting information may be found in the online version of this article.

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Section: Introductionsupporting

confidence: 74%

Super‐Toughened Heat‐Resistant Poly(lactic acid) Alloys By Tailoring the Phase Morphology and the Crystallization Behaviors

Yang

et al. 2020

Journal of Polymer Science

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“…∆H f is the heat of fusion, defined as the melting enthalpy of 100% crystalline PLA, which is 93 J g -1 . [14][15][16] Chemical properties of the untreated and the silane-treated PLA/WF composites were analysed by using a Fourier transform infrared (FTIR, Nicolet is 5) spectrophotometer at wavenumber of 650-4000 cm -1 . Colour measurement of the mPLA composites was conducted by using a colour meter (HunterLab, Colourflex EZ) in L * a * b * system.…”

Section: Testing Of Pla/wood Composite Filamentsmentioning

confidence: 99%

3D Printing Filaments Prepared from Modified Poly(Lactic Acid)/Teak Wood Flour Composites: An Investigation on the Particle Size Effects and Silane Coupling Agent Compatibilisation

Petchwattana¹,

Channuan²,

Naknaen³

et al. 2019

JPS

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“…Similarly, zinc oxide presented good heterogeneous nucleation effect in PLLA matrix and played a key role in accelerating its crystallization rate, since they are both characterized by a good interfacial compatibility . According to Feng et al , who studied the isothermal crystallization behavior of PLA with different types of nucleating agents, t 1/2 of PLA can be shortened from even 12 min to less than one minute after the addition of 0.5 wt% of the appropriate nucleating agent. Such remarkable nucleation effects are also demonstrated by the decrease of t 1/2 from 30 to 9 s with decreasing T iso from120 to 100°C, which is significant for the fast and economical production of highly crystallized PLA materials.…”

Section: Introductionmentioning

confidence: 99%

Thermal transitions and stability of melt mixed TiO₂/Poly(L‐lactic acid) nanocomposites

Athanasoulia

Tarantili

2018

Polymer Engineering & Sci

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Poly(L‐lactic acid) (PLLA) nanocomposites containing 5, 10, and 20 wt% titanium dioxide (TiO2), were prepared by mixing in a co‐rotating twin‐screw extruder. By X‐ray diffraction, a transformation of less ordered (α’‐form) to better organized crystalline (α‐form) structure of PLLA was observed with increasing TiO2 content. Differential scanning calorimetry (DSC) tests revealed that cold crystallization was facilitated, as shown by the decrease of cold crystallization temperature (Tcc). The main melting peak of PLLA phase in nanocomposites, shifted towards higher temperatures and a shoulder appeared in the lower temperature flank of the curve, revealing a second peak for 20/80 w/w TiO2/PLLA nanocomposites. The effect of TiO2 on the isothermal crystallization of PLLA, in the temperature range Tic: 100–120°C, was also investigated by DSC. At lower temperatures (Tic: 100 and 110°C), the effect of TiO2 nanoparticles is an increase of the crystallization rate, leading to lower time for the completion of crystallization, in comparison with that of pure PLLA. The inverse effect was observed at higher crystallization temperatures (Tic: 115 and 120°C). The kinetic analysis of the crystallization behavior of the examined nanocomposites fits the Avrami equation quite well and gives values for exponent (n) varying between 2 and 3, suggesting a spherulitic crystalline morphology. POLYM. ENG. SCI., 59:704–713, 2019. © 2018 Society of Plastics Engineers

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The crystallization behavior of poly(lactic acid) with different types of nucleating agents

Cited by 93 publications

References 40 publications

Super‐Toughened Heat‐Resistant Poly(lactic acid) Alloys By Tailoring the Phase Morphology and the Crystallization Behaviors

Super‐Toughened Heat‐Resistant Poly(lactic acid) Alloys By Tailoring the Phase Morphology and the Crystallization Behaviors

3D Printing Filaments Prepared from Modified Poly(Lactic Acid)/Teak Wood Flour Composites: An Investigation on the Particle Size Effects and Silane Coupling Agent Compatibilisation

Thermal transitions and stability of melt mixed TiO₂/Poly(L‐lactic acid) nanocomposites

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The crystallization behavior of poly(lactic acid) with different types of nucleating agents

Cited by 93 publications

References 40 publications

Super‐Toughened Heat‐Resistant Poly(lactic acid) Alloys By Tailoring the Phase Morphology and the Crystallization Behaviors

Super‐Toughened Heat‐Resistant Poly(lactic acid) Alloys By Tailoring the Phase Morphology and the Crystallization Behaviors

3D Printing Filaments Prepared from Modified Poly(Lactic Acid)/Teak Wood Flour Composites: An Investigation on the Particle Size Effects and Silane Coupling Agent Compatibilisation

Thermal transitions and stability of melt mixed TiO2/Poly(L‐lactic acid) nanocomposites

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Thermal transitions and stability of melt mixed TiO₂/Poly(L‐lactic acid) nanocomposites