A multi-scale tool for functionalization of polyolefins through radical grafting

Free radical induced grafting of polymers is an important synthesis strategy to improve the properties of the pristine polymer and to ensure compatibility in blends. In this contribution, a multi-scale modeling tool is presented that enables to describe the grafting kinetics with a detailed description at the molecular, micro- and meso-scale combined with a 1D macro-scale reactor model. The potential of the model is illustrated with polyolefins as polymer substrate, including model validation to lab-scale and industrial scale data. It is highlighted that the model is indispensable to achieve the optimal process conditions for improved process intensification and functionality/molecular control

An advanced kinetic modeling for reactive polymer processing

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Semejanza de triángulos

"En este documento, presentamos la unidad didáctica para el tema semejanza de triángulos, realizada por el grupo 6 de la Séptima Cohorte en la Maestría en Educación Matemática de la Universidad de los Andes. Describimos la unidad didáctica a partir de la articulación de los contenidos, los aspectos cognitivos, el esquema general de la unidad didáctica y las conclusiones. La articulación de los contenidos corresponde al análisis de los conceptos, fenómenos y representaciones asociados a la semejanza de triángulos. Los aspectos cognitivos están relacionados con las expectativas de aprendizaje, limitaciones de aprendizaje y criterios de logro. En el esquema general de la unidad didáctica encontramos una descripción de las tareas de evaluación (diagnóstica y examen final) y de las tareas de aprendizaje para cada uno de los objetivos. Finalmente, presentamos las conclusiones del proceso de diseño e implementación de la unidad didáctica." -- Tomado del Formato de Documento de Grado."In this document, we present the didactic unit for the topic triangles similarity, carried out by group 6 of the Seventh Cohort in the Master's Degree in Mathematical Education at the Universidad de los Andes. We describe the didactic unit from the articulation of the contents, the cognitive aspects, the general scheme of the didactic unit and the conclusions. The articulation of content corresponds to the analysis of concepts, phenomena, and representations associated with the triangles similarity. The cognitive aspects are related to learning expectations, learning limitations and achievement criteria. In the general scheme of the didactic unit we find a description of the assessment tasks (diagnostic and final examination) and some learning tasks for each of the objectives. Finally, we present the conclusions related to the designing and implementation process of the didactic unit." -- Tomado del Formato de Documento de Grado.Magíster en Educación MatemáticaMaestrí

A theoretical exploration of the potential of ICAR ATRP for one- and two-pot synthesis of well-defined diblock copolymers

Kinetic Monte Carlo simulations are performed to investigate the capability of ICAR ATRP for the synthesis of well-defined poly(isobornyl acrylate-b-styrene) block(-like) copolymers using one-pot semi-batch and two-pot batch procedures. The block copolymer quality is quantified via a block deviation (BD) value. For BD values lower than 0.30, the quality is defined as good and for well-chosen polymerization conditions the formation of homopolymer chains upon addition of the second monomer can be suppressed. A better block quality is obtained when isobornyl acrylate is polymerized first. For lower Cu levels a one-pot semi-batch procedure allows a much faster ATRP and better control over the polymer properties than a two-pot batch procedure