| Titre : |
Isothermal crystallization on the test stand : Kinetic analysis of isothermal LDPE crystallization using DSC |
| Type de document : |
texte imprimé |
| Auteurs : |
Claire Strasser, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
p. 53-56 |
| Langues : |
Anglais (eng) |
| Catégories : |
Analyse thermique
Cinétique chimique
Cristallisation
Equation cinétique
Mesure
Polyéthylène basse densité
Polymères -- Analyse
Température
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
The crystallinity of plastic and its mechanical properties depend not exclusively on the polymer structure but also on its processing parameters. Differential scanning calorimetry can be used to simulate the behavior of the material in the tool. This is illustrated using LDPE as an example. |
| Note de contenu : |
- Isothermal crystallization of LDPE
- Derivation of Avrami equation
- Determination of the crystallization kinetics using the DSC curves
- FIGURES : 1. Isothermal crystallization of LDPE at 103°C ; clear separation between cooling and isothermal segment - 2. Isothermal crystallization tests on LDPE at different temperatures - 3. Determination of the individual peak subareas at different time values (measurement at 103,5°C). The interval increase to the next peak subarea is 131s respectively - 4. Crystallization speed of LDPE at different isothermal temperatures - 5. Avrami plots (In[1-α)] in dependency on In[t]) for measurements on LDPE at 103,5°C, 103°C, 102,5°C, and 101,5°C - 6. Correlation between In[k] at four different isothermal crystallization temperatures (shown as 1/T) and linear fit
- TABLES : 1. Results of isothermal crystallization of PE-LD at four different temperatures - 2. Results of p and In[k(T)] for each isothermal temperature |
| En ligne : |
https://drive.google.com/file/d/1A_w7VUqzZJnekkSD2qnXPNJTYlM39HuS/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27927 |
in KUNSTSTOFFE INTERNATIONAL > Vol. 107, N° 1-2 (01-02/2017) . - p. 53-56
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Isothermal crystallization on the test stand in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 1-2 (01-02/2017)
