Non-isothermal crystallization kinetics of biodegradable poly(butylene succinate-co-diethylene glycol succinate) copolymers

Liu, Fangyang; Xu, Chang‐Lian; Zeng, Jian‐Bing; Li, Shaolong; Wang, Yu‐Zhong

doi:10.1016/j.tca.2013.06.025

Cited by 21 publications

(10 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Liu and Yang reported similar results of polyamide‐6/graphite oxide nanocomposites and the literature of Liu et al . on nonisothermal crystallization kinetics of biodegradable poly(butylene succinate‐co‐diethylene glycol succinate) copolymers also showed the similar conclusion.…”

Section: Resultssupporting

confidence: 59%

See 1 more Smart Citation

Nonisothermal crystallization kinetics of poly(butylene terephthalate)/epoxidized ethylene propylene diene rubber/glass fiber composites

Liu

2018

Polymer Engineering & Sci

View full text Add to dashboard Cite

Nonisothermal crystallization kinetics of poly(butylene terephthalate) (PBT)/glass fiber (GF) and PBT/epoxidized ethylene propylene diene rubber (eEPDM)/GF composites were investigated by differential scanning calorimetry (DSC) at a cooling rates of 2.5, 5, 10, and 20 °C/min, respectively. Morphologies of samples were observed with scanning electron microscopy and polarized optical microscopy. The specimens were prepared by melt blending. Analyses of the melt crystallization data by various macrokinetic models such as Jeziorny‐modified Avrami, Liu–Mo models, and Lauritzen–Hoffman equation revealed that GF accelerated the crystallization rate of PBT; furthermore, the eEPDM had two functions: on the one hand, eEPDM promoted PBT to form nuclei; on the other hand, eEPDM hindered the diffusion of polymer chains, but the nucleation effect exceeded the diffusion effect, thus, the eEPDM could increase the crystallization rate of PBT in PBT/eEPDM/GF. These results were further supported by the effective activation energy calculated by isoconversional method of Friedman. POLYM. ENG. SCI., 59:330–343, 2019. © 2018 Society of Plastics Engineers

show abstract

Section: Resultssupporting

confidence: 59%

“…Moreover, other effects such as the slow secondary crystallization and the folded chain length are also not considered in the Ozawa model . These factors have made the quasi‐isothermal nature of Ozawa treatment somewhat questionable in the analyses of nonisothermal crystallization kinetics of PBT and its composites .…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Nonisothermal crystallization kinetics of poly(butylene terephthalate)/epoxidized ethylene propylene diene rubber/glass fiber composites

Liu

2018

Polymer Engineering & Sci

View full text Add to dashboard Cite

show abstract

“…The application of isoconversional (model-free) methods for non-isothermal data corresponding to processes that occur on heating leads to positive values of activation energy (E), while their application for processes that occur on cooling, like crystallization of polymer melts, leads to negative values of E [1][2][3][4][5][6][7][8][9][10]. Vyazovkin [1] noted that in the last case, E does not have physical meaning of an ''activation energy of crystallization'' and/or an ''energy barrier,'' as was sometimes interpreted.…”

Section: Introductionmentioning

confidence: 99%

“…In such cases, it is recommended to apply the differential isoconversional method suggested by Friedman [15] that uses ''punctual'' values of rate or methods that use small values of Da for which it is assumed that kinetic parameters are constant [16]. This is also the case of cooling processes for which the effective activation energy increases with the conversion degree [1][2][3][4][5][6][7][8][9][10]. Therefore, for these processes, Vyazovkin [1] recommended the use of Friedman method and ''advanced isoconversional method'' (Adv method) [17] that involves the integration of rate equation on small ranges of variables.…”

Section: Introductionmentioning

confidence: 99%

“…Inside the considered range of x (-100 B x B -0.5) the percentage error is higher than 2 % b It was kipped into account the minimum value of x for which p(x) is a monotone function c Inside the considered range of x (-100 B x B -0.5) the percentage error is higher than 0.5 % processes[1][2][3][4][5][6][7][8][9][10], e decreases from 8.594 9 10 5 for x = 100 to 18.550 for x = 12.5.According to…”

mentioning

confidence: 99%

See 1 more Smart Citation

Applicability of some approximations of the temperature integral used for heating processes to processes taking place on cooling

Budrugeac¹

2015

J Therm Anal Calorim

View full text Add to dashboard Cite

The accuracy of 21 approximations of temperature integral used for heating processes was checked for cooling processes, like crystallization from melt of polymers. For cooling processes, the deviations of the considered approximations of temperature integral relative to the numerical solution are evaluated, and some recommendations are proposed. The errors involved in the determination of effective activation energy for crystallization from melt of poly(ethylene terephthalate) when different approximations of temperature integral (compared with the values calculated on the basis of numerical solution of this integral, taken as the exact or correct solution) are evaluated.

show abstract

Nonisothermal crystallization and morphology of crystallites of polyamide 66 and copolyamide 66 containing 2‐carboxyethyl phenyl phosphinic acid

Tan

Lian

Sun

et al. 2014

J of Applied Polymer Sci

View full text Add to dashboard Cite

Flame-retardant polyamide 66 with a 10% mass fraction of 2-carboxyethyl phenyl phosphinic acid (CEPPA) hexamethylene diamine salt (PA66-10) was fabricated in our previous study. In this study, the nonisothermal crystallization kinetics of pure polyamide 66 (PA66-0) and PA66-10 were measured by differential scanning calorimetry, and the data obtained were analyzed, and we calculated the average Avrami exponent (n) and used the Jeziorny, Mo, and Kissinger methods. The results from all of these methods show that the crystallization mechanism of PA66-0 mainly consisted of three stages, whereas PA66-10 mainly consisted of two stages. At the prime stage, both PA66-0 and PA66-10 may have had the same crystallization mechanism. When the cooling rates were 15 and 20 C/min, the approximate n suggested that the growth form of the spherulite mode in PA66-0 may have been complicated, whereas PA66-10 may have had a one-dimensional, two-dimensional space-extension, circular, diffusion controlled growth. The crystallization activation energies were determined to be 183.2 and 301 kJ/mol for PA66-0 and PA66-10, respectively, by the Kissinger method. To further study the influence of the addition of CEPPA on the crystallization behaviors of PA66-0, the spherulitic morphologies were examined by polarized light microscopy.

show abstract

Non-isothermal crystallization kinetics of biodegradable poly(butylene succinate-co-diethylene glycol succinate) copolymers

Cited by 21 publications

References 46 publications

Nonisothermal crystallization kinetics of poly(butylene terephthalate)/epoxidized ethylene propylene diene rubber/glass fiber composites

Nonisothermal crystallization kinetics of poly(butylene terephthalate)/epoxidized ethylene propylene diene rubber/glass fiber composites

Applicability of some approximations of the temperature integral used for heating processes to processes taking place on cooling

Nonisothermal crystallization and morphology of crystallites of polyamide 66 and copolyamide 66 containing 2‐carboxyethyl phenyl phosphinic acid

Contact Info

Product

Resources

About