Academic Journal
Morphology and dynamical behaviour of grafted copolymers
| العنوان: | Morphology and dynamical behaviour of grafted copolymers |
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| المؤلفون: | Etienne, S., Hiver, J.M., Billy, M., Jonquières, A., Clément, R., Stevenson, Isabelle, Nikaj, E., David, L. |
| المساهمون: | Laboratoire de physique des matériaux (LPM), Université Henri Poincaré - Nancy 1 (UHP)-Institut National Polytechnique de Lorraine (INPL)-Centre National de la Recherche Scientifique (CNRS), Ecole Européenne d'Ingénieurs en Génie des Matériaux (EEIGM), Université de Lorraine (UL), Laboratoire de Chimie Physique Macromoléculaire (LCPM), Institut de Chimie - CNRS Chimie (INC-CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Ingénierie des Matériaux Polymères - Laboratoire des Matériaux Polymères et des Biomatériaux (IMP-LMPB), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet - Saint-Étienne (UJM)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | ISSN: 0921-5093 ; EISSN: 1873-4936. |
| بيانات النشر: | HAL CCSD Elsevier |
| سنة النشر: | 2009 |
| المجموعة: | Université Jean Monnet – Saint-Etienne: HAL |
| مصطلحات موضوعية: | Cellulose acetate, Grafted copolymers, Mechanical spectroscopy, Dielectric spectroscopy, Physical aging, [CHIM.POLY]Chemical Sciences/Polymers |
| الوصف: | International audience ; The interactions between the main chain and lateral chains in grafted polymers play an important role on their dynamics. This is a complex issue, since several length scales are to be taken into account, from the local intramacromolecular interactions between linked moieties up to intermolecular interactions in phase separated systems. Such phenomena are investigated on the basis of new copolymers obtained by controlled radical polymerization. The effect of two parameters are studied separately, namely (i) the number of grafted chains on the main chain (cellulose acetate) and (ii) the length of grafted moieties (poly(methyl(diethylene glycol)methacrylate)). The dynamics of molecular motions was assessed by Low Frequency Mechanical Spectroscopy and Broad Band Dielectric Spectroscopy. The complex shear and dielectric moduli were measured on thin films (60m thickness) as a function of frequency and temperature. The sensitivity of these relaxation spectroscopy techniques, as compared to calorimetry measurements, allowed to study the effects of (i) the chemical structure of the copolymers and (ii) the microstructure at the nanoscale, as investigated by Small Angle X-ray Scattering. It is shownthat the main parameter is the soft grafted moities content: as expected the molecular mobility increases as the content of soft grafted chains increases. In addition, it is shown that this molecular mobility is drastically depressed by thermal treatment. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | hal-00423749; https://hal.science/hal-00423749 |
| DOI: | 10.1016/j.msea.2008.09.104 |
| الاتاحة: | https://hal.science/hal-00423749 https://doi.org/10.1016/j.msea.2008.09.104 |
| رقم الانضمام: | edsbas.9F5BE9CE |
| قاعدة البيانات: | BASE |
| DOI: | 10.1016/j.msea.2008.09.104 |
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