6533b82afe1ef96bd128c0bd
RESEARCH PRODUCT
Blockcopolymere aus 2-Isopropenylnaphthalin und Hexamethylcyclotrisiloxan, 7
Thomas RheinRolf C. Schulzsubject
chemistry.chemical_classificationEnd-groupchemistry.chemical_compoundMaterials scienceAnionic addition polymerizationPolymerizationchemistryEthylene oxideDepolymerizationPolymer chemistryButyllithiumCopolymerPolymerdescription
Anionic polymerization of 2-isopropenylnaphthalene (2-IPN), with butyllithium in THF at −78°C was terminated with ethylene oxide and the resulting terminal alkoxide was used to initiate the polymerization of hexamethylcyclotrisiloxane (D3) at +40°C. This led to the formation of AB-block copolymers which were coupled to ABBA-block copolymers by addition of dichlorodimethylsilane. ABBA-blockcopolymers were obtained with contents of polymethylsiloxane (poly(DMS)) between 77 and 84% of weight and block molecular weights between 1 700 and 27 000 (poly(2-IPN)) and 13 000 and 240 000 (poly(DMS)). Phase separation in polymer films casted from different solvents was studied by electron microscopy and by DSC measurements. The block copolymers behave as elastomers in the temperature range from −40 to +190°C. Above 290°C depolymerization of poly(2-IPN) starts.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1985-11-01 | Die Makromolekulare Chemie |