Polyolefins functionalization by copolymerization of ethylene (propylene) with substituted norbornene

I. N. Meshkova; V. G. Grinev; E. B. Kiseleva; L. N. Raspopov; A. N. Shchegolikhin; S. P. Kuznetsov; A. V. Mitrofanov; S. V. Shestov; A. I. Udovenko; T. A. Ladygina; L. A. Novokshonova

Published : 2022-08-23

Vol. 53 No. 5 (2008)

Polyolefins functionalization by copolymerization of ethylene (propylene) with substituted norbornene

I. N. Meshkova V. G. Grinev E. B. Kiseleva L. N. Raspopov A. N. Shchegolikhin S. P. Kuznetsov A. V. Mitrofanov S. V. Shestov A. I. Udovenko T. A. Ladygina L. A. Novokshonova

Abstract

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).

Keywords

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

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Meshkova, I. N., Grinev, V. G., Kiseleva, E. B., Raspopov, L. N., Shchegolikhin, A. N., Kuznetsov, S. P., … Novokshonova, L. A. (2022). Polyolefins functionalization by copolymerization of ethylene (propylene) with substituted norbornene. Polimery, 53(5), 345–352. Retrieved from https://ichp.vot.pl/index.php/p/article/view/1317

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I. N. Meshkova lnow@chph.ras.ru

Affiliation
Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina 4, Moscow, 119991 Russia

V. G. Grinev

E. B. Kiseleva

L. N. Raspopov

A. N. Shchegolikhin

S. P. Kuznetsov

A. V. Mitrofanov

S. V. Shestov

A. I. Udovenko

T. A. Ladygina

L. A. Novokshonova