4/28/2023 0 Comments Emulsion polymersThe implementation of the approach illustrated in Figure 1 has important economic implications and is scientifically challenging. Long-term success can only be guaranteed with knowledge-based strategies that use the polymer microstructure as a link between the reactor variables and the final properties (Fig. Although this approach likely dominates current practice, this cannot be a long-term solution in a scenario of strong competition and margin reductions. A possibility is to consider the reactor as a black box and to develop empirical relationships between process variables and product properties. A critical point is to know how these process variables affect the final properties of the product. Emulsion polymers are “products by process” whose main properties are determined during polymerization. In this scenario of margins reduction, increasing competition, and public sensitivity to environmental issues, emulsion polymer producers are forced to achieve an efficient production of high-quality materials in a consistent, safe, and environmentally friendly way. 11, 12 Conventional emulsion polymerization accounts for the majority of the world's production (>20 × 10 6 tones/year). The term emulsion polymerization encompasses several related processes: (1) conventional emulsion polymerization, (2) inverse emulsion polymerization, (3) miniemulsion polymerization, 5- 7 (4) dispersion polymerization, 8- 10 and microemulsion polymerization. 1- 4 The development of this industry has been due to both the possibility of producing polymers with unique properties and the environmental concerns and governmental regulations to substitute solvent-based systems by waterborne products. J Polym Sci Part A: Polym Chem 42: 1025–1041, 2004Įmulsion polymerization is used in the production of a wide range of specialty polymers including adhesives, paints, binders for nonwoven fabrics, additives for paper, textiles and construction materials, impact modifiers for plastic matrices, diagnostic tests, and drug-delivery systems. In the second part, the advances in process development (optimization, online monitoring and control, monomer removal, production of high-solids, low-viscosity latices, and process intensification) are presented. The advanced mathematical models developed in the group are also reviewed. This includes studies in radical entry and exit, oil-soluble initiators, propagation-rate constants of acrylic monomers, processes involved in the formation of branched and crosslinked polymers, microstructure modification by postreaction operations, the formation of particle morphology, and reactive surfactants. First, the research in fundamental mechanisms is discussed. This highlight reviews the investigations carried out at The University of the Basque Country to develop a knowledge-based strategy to achieve these goals. In this scenario of margins reduction, increasing competition, and public sensitivity to environmental issues, the challenge is to achieve an efficient production of high-quality materials in a consistent, safe, and environmentally friendly way.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |