Isothermal and non-isothermal crystallization kinetics of PLA/PBS blends with talc as nucleating agent

Somsunan, Runglawan; Mainoiy, Narinya

doi:10.1007/s10973-019-08631-9

Cited by 30 publications

(15 citation statements)

References 19 publications

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“…Moreover, the peak shape of crystallization evidently become wider and the ΔT also becomes larger, showing that the crystallization ability of NAPAH-nucleated PLLA is weakened, the probable reason depends on the effect of the cooling rate on the crystal growth, a higher cooling rate have a time inhibition for the regular arrangement of PLLA chain segment. The similar results can be found in literatures [38,40,41]. When the cooling rate is increased to 20°C/min, the crystallization ability is further weakened, even the melt-crystallization peak of PLLA/0.5%NAPAH almost cannot be observed in DSC curve.…”

Section: Crystallization Behavior Of Plla/napahsupporting

confidence: 90%

Thermal properties and processability of modified poly(L-lactide): the role of phenylacetic acid hydrazide derivative

Hao

Cai

Zhao

2022

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The influence of phenylacetic acid hydrazide (NAPAH) derivative content, melt temperature (170−200°C) and cooling rate (1−20°C/min) on poly (L-lactide) (PLLA) nucleation were investigated. Increasing the content of NAPAH (0.5−3.0 wt.%) had a positive effect on PLLA crystallization, while an increase in the cooling rate and heating temperature had a negative effect. In the case of isothermal crystallization carried out for a long time (180 min), the melting process depended only on the crystallization temperature. NAPAH also influenced the cold crystallization temperature, reduced thermal stability and improved PLLA processability (MFR).

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Section: Crystallization Behavior Of Plla/napahsupporting

confidence: 90%

Thermal properties and processability of modified poly(L-lactide): the role of phenylacetic acid hydrazide derivative

Hao

Cai

Zhao

2022

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“…When considered in light of Ozawa’s theory, poor fitting of the equation was observed. The sluggish secondary crystallization and the dependency of lamellar thickness on the temperature were not observed; therefore, the model could not describe the complete nonisothermal process of polymers [ 42 , 43 , 44 , 45 ].…”

Section: Resultsmentioning

confidence: 99%

The Isothermal and Nonisothermal Crystallization Kinetics and Morphology of Solvent-Precipitated Nylon 66

Tseng

Tsai

2022

Polymers

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Solvent-precipitated nylon 66 (SP PA66) is a key material used to fabricate microfiltration membranes. The crystallization kinetics and behavior of SP PA66 were investigated through differential scanning calorimetry (DSC), polarized optical microscopy (POM) and X-ray diffraction (XRD). The Avrami equation was used to describe the isothermal crystallization of SP PA66. Nonisothermal crystallization behaviors were analyzed using Avrami equations modified by Jeziorny, Ozawa and Mo. The Avrami analysis demonstrated that the k values of SP PA66 were higher than those of neat PA66. The was between 2 and 3 indicating the presence of two- and three-dimensional mode with thermal nucleation. With an increasing cooling rate, the Jeziorny crystallization rate constant increased for SP PA66; however, the Ozawa model was not satisfactory for all SP PA66 samples. The Mo method suggested that SP PA66 had a faster crystallization rate than neat PA66 during the nonisothermal crystallization process. The solvents dissolved nylon 66, rearranged it and formed a regular hydrogen-bonded region. These regions served as nucleation sites and increased the crystallization rate constant in the subsequent melting process. The crystal morphology of the SP PA66 under the POM investigation exhibited Maltese cross spherulites. The sizes of the spherulites of SP PA66 were significantly smaller than those of neat PA66. Wide-angle XRD revealed that SP PA66 had the same crystal structure and a higher crystal perfection than neat PA66.

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“…From Table 2 , it can also be witnessed that n values reduce as the mole% of BAEA/AA in the PA6 rises, which confirms that there is a rise in the heterogeneity during the growth step owing to the restricted mobility of the PA6 copolyamide. Besides, the small Avrami exponent value, n , might be due to the faster crystallization growing process, which does not permit adequate time for growth in three-dimensions [ 46 , 47 ]. Furthermore, the three-dimensional crystal was difficult to constitute with the increasing BAEA/AA content, as demonstrated by the narrowing n value.…”

Section: Resultsmentioning

confidence: 99%

Effect of Bis (2-Aminoethyl) Adipamide/Adipic Acid Segment on Polyamide 6: Crystallization Kinetics Study

et al. 2020

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The crystallization behavior of novel polyamide 6 (PA6) copolyamides with different amounts of bis (2-aminoethyl) adipamide/adipic acid (BAEA/AA) segment was investigated. The wide-angle X-ray diffraction (WAXD) results showed that as the amount of BAEA/AA segment increased to 10 mole%, the crystalline forms of all PA6 copolyamide were transferred from the stable α-form to the unstable γ-form because of the complex polymer structure. According to studies of crystallization kinetics, the Avrami exponent (n) values for all copolyamide samples ranged from 1.43 to 3.67 under isothermal conditions, implying that the crystallization is involved in the two- to three-dimensional growth at a high temperature of isothermal condition. The copolyamides provided a slower crystallization rate and higher crystallization activation energy (ΔEa) than neat PA6. Polyamide containing 10 mole% of BEAE/AA content exhibited a unique crystallization behavior in the coexistence of the α and γ forms. These results deepen our understanding of the relationship between BAEA/AA content, crystal structure, and its crystallization behavior in low-melting PA6, and they make these types of copolyamides useful for their practical application.

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Isothermal and non-isothermal crystallization kinetics of PLA/PBS blends with talc as nucleating agent

Cited by 30 publications

References 19 publications

Thermal properties and processability of modified poly(L-lactide): the role of phenylacetic acid hydrazide derivative

Thermal properties and processability of modified poly(L-lactide): the role of phenylacetic acid hydrazide derivative

The Isothermal and Nonisothermal Crystallization Kinetics and Morphology of Solvent-Precipitated Nylon 66

Effect of Bis (2-Aminoethyl) Adipamide/Adipic Acid Segment on Polyamide 6: Crystallization Kinetics Study

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