Etude thermophysique des copolymères réticulés à base de l’Isobornylacrylate : Approche expérimentale et modélisation

الموضوعات

علوم بحتة وطبيعية

الملخص

The systems which are the subject of the investigation, the chemically crosslinked copolymers of the"isobornyl acrylate-co-isobutyl acrylate" type (IBOA-co-IsoBA), were prepared byphotopolymerization / crosslinking under UV-visible radiation of the two monomers. IBOA and IsoBAin the presence of a di-functional crosslinking agent and a photoinitiator. In this work the thermaland mechanical properties were studied by differential scanning calorimetry (DSC), dynamicmechanical analysis (DMA) and thermogravimetric analysis (TGA).We have found by calorimetric analysis (DSC) that the modification of the concentration ofcrosslinking agent, the amount of monomers, and the speed of the heating ramp affect, in particular,the glass transition temperature Tg: an increase of these parameters causes an increase in the glasstransition temperature of the copolymer. Thermogravimetric analysis by (TGA) shows that thedegradation of the copolymer occurs in two stages, and that the increase of the amount of IsoBAdecreases the degradation temperature of the copolymer. The study of copolymers of type (IBA-co-IsoBA) by DMA was undertaken according to the frequency and the temperature, in order toevaluate the modulus of elasticity (E ') and of loss (E' ') . A master curve has been obtained using thetime-temperature superposition principle. Modeling of the mechanical relaxations was carried out byapplying the models of Arrhenius, Cole-Cole, WLF and VFT (Vogel Fulcher Tamman).

روابط وملفات

التعريف والنوع

رقم الوثيقة

049424bb-c5d8-4d15-8192-30e45e49b220

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل دكتوراة

نوع الملف

pdf image

أسماء الملفات

049424bb-c5d8-4d15-8192-30e45e49b220_1.pdf

بيانات النشر

ألقاب المؤلفين

[{"name_ar":" Ulrich Maschke","title_ar":"اشراف","title_en":"Supervision"},{"name_ar":"Boumediene Dali Youcef","title_ar":"اشراف","title_en":"Supervision"},{"name_ar":"ZEGGAI Nouh","title_ar":"اعداد","title_en":"Preparation"}]

اللغة

French

المصدر والدورية

اسم المصدر

Etude thermophysique des copolymères réticulés à base de l’Isobornylacrylate : Approche expérimentale et modélisation

المحتوى والصفحات

عدد الصفحات

0

إشراف وإعداد

الإشراف

Ulrich Maschke, Boumediene Dali Youcef

الإعداد

ZEGGAI Nouh

الاقتباسات الببليوغرافية