التفاصيل البيبلوغرافية
| العنوان: |
Polyolefins functionalization by copolymerization of ethylene (propylene) with substituted norbornene |
| المؤلفون: |
Meshkova, I. N., Grinev, V. G., Kiseleva, E. B., Raspopov, L. N., Shchegolikhin, A. N., Kuznetsov, S. P., Mitrofanov, A. V., Shestov, S. V., Udovenko, A. I., Ladygina, T. A., Novokshonova, L. A. |
| المصدر: |
Polimery. |
| مصطلحات موضوعية: |
katalizatory metalocenowe, olefiny, 5-etylideno-2-norbornen, kopolimeryzacja, struktura supramolekularna, budowa chemiczna, właściwości cieplne, przezroczystość, metallocene catalysts, olefins, 5-ethylidene-2-norbornene, copolymerization, supramolecular structure, chemical structure, thermal properties, transparency |
| الوصف: |
number of new copolymers of ethylene (propylene) and 5-ethylidene-2-norbornene (EN) containing 5-62 mol. % of the cyclic comonomer units in the main chain have been synthesized by employing of three ansa-metallocene catalytic systems, namely: Et[Ind]2ZrCl2/methylalumoxane, Et[IndH4]2ZrCl2/methylalumoxane or Me2Si[Ind]2ZrCl2/methylalumoxane. In this way side >C=CH-CH3 groups in the range up to 7ź10-3 mol/g were incorporated into a structure of polyolefin chain. As it was found by IR-spectroscopy, the side ethylidene groups of poly(ethylene-co-5-ethylidene-2-norbornene) were susceptible to ozonolysis reactions and converted into the polar carbonylic groups. According to DSC, X-ray diffraction and very cold neutrons scattering (VCN) data, enrichment of poly(ethylene-co-5-ethylidene-2-norbornene) with EN units has lead to eventual transformation of the studied copolymers from a partly crystalline state to a fully amorphous one. With the growing cyclic comonomer partial content the copolymers have exhibited progressively better optical transparency and higher glass transition temperatures (up to 85°C); they are characterized by a high density (d>1000kg/m3). |
| نوع الوثيقة: |
Article |
| اللغة: |
English |
| URL الوصول: |
http://yadda.icm.edu.pl/baztech/element/bwmeta1.element.baztech-article-BAT7-0010-0037 |
| رقم الانضمام: |
edsbzt.bwmeta1.element.baztech.article.BAT7.0010.0037 |
| قاعدة البيانات: |
BazTech |