Analysis of nylon 66 solidification process

Albano, Carmen; Sciamanna, Rosalba; Gonzalez, Rene I.; Papa, José

doi:10.1016/s0014-3057(00)00172-5

Cited by 20 publications

(14 citation statements)

References 14 publications

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“…Therefore, the twocomponent system in this work offers tremendous simplicity and advantages over the conventional nylon syntheses. 19,20 Controlled reactions of mono-isocyanato-azetidine-2,4-diones, 3a, have also been performed in this work. The isocyanate group of 3a is more reactive of the two functional groups, and can react readily with compounds possessing either amino, hydroxyl, or other active hydrogens.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of N‐aryl azetidine‐2,4‐diones and polymalonamides prepared from selective ring‐opening reactions

Dai

Juang

Chen

et al. 2006

J of Applied Polymer Sci

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Improved high-yield synthesis of N-aryl azetidine-2,4-dione has been achieved. The azetidine-2,4-dione undergoes ring-opening reactions with aliphatic primary amines to form malonamide linkages. More importantly, this compound exhibits a high reactivity toward primary aliphatic amine group over alcohols or secondary amines. This selective end-group functionalization is useful for preparing useful polymer intermediates. In this study polymalonamides were synthesized by fast addition reaction of aliphatic diamine and azetidine-2,4-dione. In the meantime, further application for structure-controlled reaction also has been demonstrated.

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Section: Resultsmentioning

confidence: 99%

Synthesis of N‐aryl azetidine‐2,4‐diones and polymalonamides prepared from selective ring‐opening reactions

Dai

Juang

Chen

et al. 2006

J of Applied Polymer Sci

View full text Add to dashboard Cite

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“…The analysis of the experimental data was carried out using a program for characterization and analysis, whose general calculation logic was described by Albano et al [9][10].…”

Section: Experimental Partmentioning

confidence: 99%

“…Dietz' model This model [10] introduces an additional term into the equation of crystallization rate proposed by Avrami to consider secondary crystallization (post-Avrami). This new parameter, a, can take values within 0 -1.…”

Section: Non-isothermal Crystallizationmentioning

confidence: 99%

“…Kinetic parameters for the non-isothermal crystallization process of PP-talc composite were determined from the values of k and n, k 1 , k 2 , n 1 and n 2 obtained from the isothermal crystallization process using Avrami's and Velisaris-Seferis' equations with a simulation and modelling program for crystallization kinetics [10].…”

Section: Kinetic Parametersmentioning

confidence: 99%

“…A study on the kinetics in a non-isothermal process, for the Avrami exponent n that changes as a function of temperature, takes the average of the values isothermally obtained, as reported by De Porter et al [22], Patel and Spruiell [27], and Albano et al [10]. Tab.…”

Section: Kinetic Parametersmentioning

confidence: 99%

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Characteristics of non-isothermal crystallization of polypropylene with and without talc

et al. 2004

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The non-isothermal behaviour of crystallization of polypropylene (PP) and its talc-filled composites was investigated by means of differential scanning calorimetry. Different analytical methods were used to describe the crystallization process. According to the behaviour of crystallization temperature, crystallization activation energy and crystallization parameters and coefficient, talc results in an increase in PP crystallization rate and in a decrease in total energy opposing to homogeneous crystallization. Velisaris-Seferis' kinetic equation was found to describe reasonably well the non-isothermal behaviour of crystallization of PP and its filled composites.

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Nonisothermal and isothermal crystallization kinetics of nylon‐12

McFerran

Armstrong

McNally

2008

J of Applied Polymer Sci

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The isothermal and nonisothermal crystallization behavior of Nylon 12 was investigated using differential scanning calorimetry (DSC). An Avrami analysis was used to study the isothermal crystallization kinetics of Nylon 12, the Avrami exponent (n) determined and its relevance to crystal growth discussed and an activation energy for the process evaluated using an Arrhenius type expression. The Lauritzen and Hoffman analysis was used to examine the spherulitic growth process of the primary crystallization stage of Nylon 12. The surface-free energy and work of chain folding were calculated using a procedure reported by Hoffmann and the work of chain folding per molecular fold (r) and chain stiffness of Nylon 12 (q) was calculated and compared to values reported for Nylons 6,6 and 11. The Jeziorny modification of the Avrami analysis, Cazé and Chuah average Avrami parameter methods and Ozawa equation were used in an attempt to model the nonisothermal crystallization kinetics of Nylon 12. A combined Avrami and Ozawa treatment, described by Liu, was used to more accurately model the nonisothermal crystallization kinetics of Nylon 12. The activation energy for nonisothermal crystallization processes was determined using the Kissinger method for Nylon 12 and compared with values reported previously for Nylon 6,6 and Nylon 11.

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Analysis of nylon 66 solidification process

Cited by 20 publications

References 14 publications

Synthesis of N‐aryl azetidine‐2,4‐diones and polymalonamides prepared from selective ring‐opening reactions

Synthesis of N‐aryl azetidine‐2,4‐diones and polymalonamides prepared from selective ring‐opening reactions

Characteristics of non-isothermal crystallization of polypropylene with and without talc

Nonisothermal and isothermal crystallization kinetics of nylon‐12

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