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Title: Automatic Synthesis of Multimodal Polymers

Abstract

An automatic molecular weight controller is used in semi‐batch reactions to produce final polymers that contain distinct subpopulations with different molecular weight distributions (MWD). While blending polymers with different MWD is frequently used to make multimodal polymer products, a method is introduced here allowing the multimodal product to be made in successive, automatically controlled stages in the same reactor. The method is demonstrated using free radical polymerization of acrylamide to produce widely separated multimodal MWD. Automatic Continuous Online Monitoring of Polymerization reactions with a Control Interface (ACOMP/CI) was used. Weight average molecular weight ( M w ) in the ACOMP/CI was continuously measured with multi‐angle light scattering and ultra‐violet absorption. The controller used two principles: both polymerization rate and instantaneous molecular weight are proportional to monomer concentration. By controlling monomer flow rate into the reactor, the controller produced a targeted amount of polymer with a desired first M w and then automatically introduced chain transfer agent (CTA) into the reactor to produce a second population of polymers with much lower M w . Subsequently, reactions were performed to produce trimodal populations. This approach is kindred to multi‐stage synthesis of polymers where distinctly different processes are carried out in succeeding stagesmore » to produce polymers with highly specific properties. image« less

Authors:
 [1];  [1];  [2];  [3];  [1];  [3]
+ Show Author Affiliations
  1. Advanced Polymer Monitoring Technologies, Inc., New Orleans, LA (United States)
  2. Tulane Univ., New Orleans, LA (United States); Univ. of Sao Paulo, Lorena (Brazil)
  3. Tulane Univ., New Orleans, LA (United States)
Publication Date:
Research Org.:
Tulane Univ., New Orleans, LA (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); National Science Foundation (NSF)
OSTI Identifier:
1533193
Alternate Identifier(s):
OSTI ID: 1375472
Grant/Contract Number:  
EE0005776; EPS-1430280; DE‐ EE0005776
Resource Type:
Accepted Manuscript
Journal Name:
Macromolecular Reaction Engineering
Additional Journal Information:
Journal Volume: 11; Journal Issue: 4; Journal ID: ISSN 1862-832X
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; engineering; polymer science; ACOMP; automatic reaction control; light scattering; molecular weight distributions; multimodal polymers

Citation Formats

Leonardi R., Natalie C., Montgomery, Rick D., Siqueira, Julia, McAfee, Terry, Drenski, Michael F., and Reed, Wayne F. Automatic Synthesis of Multimodal Polymers. United States: N. p., 2017. Web. doi:10.1002/mren.201600072.
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Leonardi R., Natalie C., Montgomery, Rick D., Siqueira, Julia, McAfee, Terry, Drenski, Michael F., & Reed, Wayne F. Automatic Synthesis of Multimodal Polymers. United States. https://doi.org/10.1002/mren.201600072
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Leonardi R., Natalie C., Montgomery, Rick D., Siqueira, Julia, McAfee, Terry, Drenski, Michael F., and Reed, Wayne F. Tue . "Automatic Synthesis of Multimodal Polymers". United States. https://doi.org/10.1002/mren.201600072. https://www.osti.gov/servlets/purl/1533193.
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@article{osti_1533193,
title = {Automatic Synthesis of Multimodal Polymers},
author = {Leonardi R., Natalie C. and Montgomery, Rick D. and Siqueira, Julia and McAfee, Terry and Drenski, Michael F. and Reed, Wayne F.},
abstractNote = {An automatic molecular weight controller is used in semi‐batch reactions to produce final polymers that contain distinct subpopulations with different molecular weight distributions (MWD). While blending polymers with different MWD is frequently used to make multimodal polymer products, a method is introduced here allowing the multimodal product to be made in successive, automatically controlled stages in the same reactor. The method is demonstrated using free radical polymerization of acrylamide to produce widely separated multimodal MWD. Automatic Continuous Online Monitoring of Polymerization reactions with a Control Interface (ACOMP/CI) was used. Weight average molecular weight ( M w ) in the ACOMP/CI was continuously measured with multi‐angle light scattering and ultra‐violet absorption. The controller used two principles: both polymerization rate and instantaneous molecular weight are proportional to monomer concentration. By controlling monomer flow rate into the reactor, the controller produced a targeted amount of polymer with a desired first M w and then automatically introduced chain transfer agent (CTA) into the reactor to produce a second population of polymers with much lower M w . Subsequently, reactions were performed to produce trimodal populations. This approach is kindred to multi‐stage synthesis of polymers where distinctly different processes are carried out in succeeding stages to produce polymers with highly specific properties. image},
doi = {10.1002/mren.201600072},
journal = {Macromolecular Reaction Engineering},
number = 4,
volume = 11,
place = {United States},
year = {Tue Mar 07 00:00:00 EST 2017},
month = {Tue Mar 07 00:00:00 EST 2017}
}
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https://doi.org/10.1002/mren.201600072
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