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- Title
SYNTHESIS AND CHARACTERIZATION OF HIGH CIS-POLYMYRCENE USING NEODYMIUM-BASED CATALYSTS.
- Authors
Díaz de León Gómez, Ramón Enrique; Enríquez‐Medrano, Francisco Javier; Maldonado Textle, Hortensia; Mendoza Carrizales, Ricardo; Reyes Acosta, Karina; López González, Héctor Ricardo; Olivares Romero, José Luis; Lugo Uribe, Luis Edmundo
- Abstract
The monomer β-myrcene, a renewable resource, was polymerized in cyclohexane using two different ZieglerNatta catalyst systems based on neodymium Nd(Oi-Pr)3 and NdV3. The Nd(Oi-Pr) 3 was combined with [HNMe2Ph][B(C6F5)4] (or [CPh3][B(C6F5)4]) and Al(i-Bu)3 (or Al(i-Bu)2H). Next, the NdV3 was activated using Al(i-Bu)3 and AlEt2Cl. Both catalyst systems exhibited high polymer yields near 100% in the established reaction time, high polymer molecular masses, and broad molecular mass distributions. The catalyst systems gave an effective and stereospecific polymerization reaction of β-myrcene providing high cis selectivity of 1,4-polymyrcenes (> 92%) with a glass transition temperature between -66 and -62 °C. The above-mentioned features of resulting elastomers in conjunction with the polymer's molecular masses and molecular mass distributions proved to be sensitive to borane and alkylaluminum compounds molar ratios, [B]/[Nd] and [Al]/[Nd] using Nd(Oi-Pr) 3 and [Cl]/[Nd] and [Al]/[Nd] with NdV3.
- Subjects
NEODYMIUM; POLYMER aggregates; CHEMICAL inhibitors
- Publication
Canadian Journal of Chemical Engineering, 2016, Vol 94, Issue 5, p823
- ISSN
0008-4034
- Publication type
Article
- DOI
10.1002/cjce.22458