Control of Molecular Weight Distribution in Emulsion Polymerization Using On-Line Reaction Calorimetry
The molecular weight distribution (MWD) of linear polymers was controlled based on on-line reaction calorimetry. A method to estimate the MWD from reaction calorimetry when chain transfer to a chain-transfer agent is the main termination event was developed and its robustness assessed by simulation....
| Authors: | , , , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2001 |
| Country: | Argentina |
| Institution: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repository: | CONICET Digital (CONICET) |
| Language: | English |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/27669 |
| Online Access: | http://hdl.handle.net/11336/27669 |
| Access Level: | Open access |
| Keyword: | Control of Molecular Weight Distribution On-Line Calorimetric Data Emulsion Polymerization https://purl.org/becyt/ford/2.4 https://purl.org/becyt/ford/2 |
| Summary: | The molecular weight distribution (MWD) of linear polymers was controlled based on on-line reaction calorimetry. A method to estimate the MWD from reaction calorimetry when chain transfer to a chain-transfer agent is the main termination event was developed and its robustness assessed by simulation. Following this method, the desired final MWD was decomposed in a series of instantaneous MWDs to be produced at different stages of the process. An optimization algorithm was used to calculate the set-point trajectories to produce the desired MWD in a minimum time. A nonlinear model based controller was used to track these trajectories. The control scheme was validated by preparing polystyrene latexes of widely different predefined MWD. |
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