Catalytic copolymerization of ethylene with various olefins in solution and in emulsion

Thèse numérisée par la Division de la gestion de documents et des archives de l'Université de Montréal

Packaging and its Role in Promoting the Master of Folk Arts and Crafts

В статье представлены результаты работы инициативного исследовательского проекта по продвижению мастера народно-художественных промыслов и его изделий на примере кузнеца А. Потоскуева. Цель работы — разработать варианты дизайна упаковки с учетом требований маркетинговой эффективности. Актуальность исследования обусловлена низкоэффективным продвижением изделий мастеров. Представлен итоговый дизайн, одобренный заказчиком.The article presents the results of an initiative research project to promote the master of folk arts and crafts and his products on the example of the blacksmith A. Potoskuyev. The purpose of the work is to develop packaging design options taking into account the requirements of marketing efficiency. The relevance of the study is due to the low-effective promotion of the masters ‘ products. The final design approved by the customer is presented

Synthesis of functional ‘polyolefins’: state of the art and remaining challenges

Functional polyolefins (i.e., polyethene or polypropene bearing functional groups) are highly desired materials, due to their beneficial surface properties. Many different pathways exist for the synthesis of these materials, each with its own advantages and drawbacks. This review focuses on those synthetic pathways that build up a polymer chain from ethene/propene and functionalised polar vinyl monomers. Despite many recent advances in the various fields of olefin polymerisation, it still remains a challenge to synthesise high molecular- weight copolymers with tuneable amounts of functional groups, preferably with consecutive insertions of polar monomers occurring in a stereoselective way. To overcome some of these challenges, polymerisation of alternative functionalised monomers is explored as well

Porosity of Rigid Dendrimers in Bulk: Interdendrimer Interactions and Functionality as Key Factors

The porous structure of second- and third-generation polyphenylene-type dendrimers was investigated by adsorption of N2, Ar, and CO2 gases, scanning electron microscopy and small-angle X-ray spectroscopy. Rigid dendrimers in bulk are microporous and demonstrate a molecular sieve effect. When using CO2 as an adsorbate gas, the pore size varies from 0.6 to 0.9 nm. This is most likely due to the distances between dendrimer macromolecules or branches of neighboring dendrimers, whose packing is mostly realized due to intermolecular interactions, in particular, π–π interactions of aromatic fragments. Intermolecular interactions prevent the manifestation of the porosity potential inherent to the molecular 3D structure of third-generation dendrimers, while for the second generation, much higher porosity is observed. The maximum specific surface area for the second-generation dendrimers was 467 m2/g when measured by CO2 adsorption, indicating that shorter branches of these dendrimers do not provide dense packing. This implies that the possible universal method to create porous materials for all kinds of rigid dendrimers is by a placement of bulky substituents in their outer layer