Automatic, simultaneous control of polymer composition and molecular weight during free radical copolymer synthesis

McAfee, Terry; Montgomery, Rick D.; Zekoski, Thomas; Wu, Aide; Reed, Wayne F.

doi:10.1016/j.polymer.2017.12.005

Title: Automatic, simultaneous control of polymer composition and molecular weight during free radical copolymer synthesis

Journal Article · Thu Dec 21 00:00:00 EST 2017 · Polymer

DOI:https://doi.org/10.1016/j.polymer.2017.12.005· OSTI ID:1538758

McAfee, Terry ^[1]; Montgomery, Rick D. ^[2]; Zekoski, Thomas ^[1]; Wu, Aide ^[1]; Reed, Wayne F. ^[1]

Tulane Univ., New Orleans, LA (United States)
Fluence Analytics, New Orleans, LA (United States)

Fully automatic, simultaneous control of polymer composition and molecular weight trajectories during free radical copolymer synthesis was achieved by coupling the continuous ACOMP data stream into a feedback controller which operated pumps for reactor feed of comonomers. The controller operates without recourse to a detailed kinetic model or reactivity ratios. Rather, it uses the fact that instantaneous copolymer chain composition is related to the instantaneous rate of consumption of comonomers, and the rate for each of these is described by rates α₁ and α₂ for comonomers 1 and 2, respectively. The instantaneous weight average molecular weight M_w,inst is proportional to total comonomer concentration via a constant p. Hence, target trajectories for composition and M_w can be independently prescribed and followed. Finally, since α₁, α₂ and p are directly measurable from the ACOMP data stream, their values can be constantly updated by the automatic controller during the reaction process to insure the target trajectories are followed.

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Research Organization:: Tulane Univ., New Orleans, LA (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: EE0005776

OSTI ID:: 1538758

Alternate ID(s):: OSTI ID: 1693668

Journal Information:: Polymer, Vol. 136, Issue C; ISSN 0032-3861

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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Title: Automatic, simultaneous control of polymer composition and molecular weight during free radical copolymer synthesis

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