Velcrand Functionalized Polyethylene

Velcrands are a specific class of cavitands whose complementary surfaces induce self-dimerization. The insertion of a velcrand as physical cross-linking unit into a polymer is reported. To this purpose, the velcrand was functionalized at the lower rim with an isocyanate group. The functional velcran...

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Published inMolecules (Basel, Switzerland) Vol. 24; no. 5; p. 902
Main Authors Tellers, Jonathan, Vachon, Jérôme, Soliman, Maria, Dalcanale, Enrico, Pinalli, Roberta
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 05.03.2019
MDPI
Subjects
Calorimetry
Crosslinking
Differential scanning calorimetry
Dimerization
Evaporation
Fourier transforms
High temperature
Hydroxyl groups
Infrared spectroscopy
Isocyanates
NMR
Nuclear magnetic resonance
PE-HEMA
Polyethylene
Polyethylenes
Polymers
quinoxaline cavitand
velcrand
velcrand
PE-HEMA
polyethylene
quinoxaline cavitand
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Summary:Velcrands are a specific class of cavitands whose complementary surfaces induce self-dimerization. The insertion of a velcrand as physical cross-linking unit into a polymer is reported. To this purpose, the velcrand was functionalized at the lower rim with an isocyanate group. The functional velcrand was reacted with poly (ethylene-co-(2-hydroxethylmethacrylate)) (PE-HEMA), a polymer equipped with free hydroxyl groups suitable for reaction with the isocyanate group. The obtained functionalized polymer was characterized by nuclear magnetic resonance (NMR), differential scanning calorimetry (DSC), and Fourier transform infrared spectroscopy (FTIR), proving the introduction of velcraplexes in the polymer. Films with varying amounts of velcrands were obtained by solution casting and slow evaporation, testifying the processability of the functionalized polymers. The obtained films were used to measure the oxygen barrier properties of the functionalized material.
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ISSN:1420-3049
1420-3049
DOI:10.3390/molecules24050902