2026-09-19T11:20:36Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/1539982024-04-03T03:34:29Zcom_1721.1_7582com_1721.1_7581col_1721.1_131024
Smith, Zachary
Qian, Sherrie
Massachusetts Institute of Technology. Department of Materials Science and Engineering
2024-04-02T14:54:45Z
2024-04-02T14:54:45Z
2023-06
2024-03-25T16:00:09.435Z
https://hdl.handle.net/1721.1/153998
This study characterized the mechanical and gas transport properties of nitrile norbornene ROMP. At a concentration of 0.15 M, the nitrile norbornene was able to successfully ROMP without becoming gel-like allowing for further characterization. The number average molecular weight was found to be 155 kDa with a polydispersity of 31.04. Thermal analysis of the nitrile norbornene ROMP indicated a T subscript g at 150 °C and a degradation temperature at 410 °C. The density nitrile norbornene ROMP was calculated to be 1.046 ± 0.0290 g/cm³. Using a simulation of the repeat unit the Van der Waals volume was found to be 73.4881 ± 0.1674 cm³ mol-1 and subsequently the fractional free volume was shown to be 0.1614 ± 0.028. The permeation of the 6 pure gases through the film were lower compared to OMe-ROMP with the highest permeating gases being He, H₂, and CO₂ . The selectivities for all the gases were higher than OMe-ROMP which is expected given the drop in permeation. The nitrile norbornene film did plasticize in intervals and the specific plasticization pressure is higher than 5 bar which is the CO₂-induced plasticization pressure point for the OMe-nitrile norbornene ROMP one-pot copolymers. Forming a block copolymer using nitrile norbornene ROMP with OMe-ROMP has potential for securing the mechanical stability from the nitrile norbornene ROMP while maintaining the high gas transport performance from the OMe-ROMP.
S.B.
Massachusetts Institute of Technology
Attribution 4.0 International (CC BY 4.0)
Copyright retained by author(s)
https://creativecommons.org/licenses/by/4.0/
Characterizing Mechanical and Gas Transport Properties of Nitrile Norbornene (NN) ROMP in Preparation for Analysis of OMe-NN-ROMP Block Copolymers
Thesis
application/pdf
Bachelor
Bachelor of Science in Materials Science and Engineering
Publication
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<Title>Characterizing Mechanical and Gas Transport Properties of Nitrile Norbornene (NN) ROMP in Preparation for Analysis of OMe-NN-ROMP Block Copolymers</Title>
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<Abstract>This study characterized the mechanical and gas transport properties of nitrile norbornene ROMP. At a concentration of 0.15 M, the nitrile norbornene was able to successfully ROMP without becoming gel-like allowing for further characterization. The number average molecular weight was found to be 155 kDa with a polydispersity of 31.04. Thermal analysis of the nitrile norbornene ROMP indicated a T subscript g at 150 °C and a degradation temperature at 410 °C. The density nitrile norbornene ROMP was calculated to be 1.046 ± 0.0290 g/cm³. Using a simulation of the repeat unit the Van der Waals volume was found to be 73.4881 ± 0.1674 cm³ mol-1 and subsequently the fractional free volume was shown to be 0.1614 ± 0.028. The permeation of the 6 pure gases through the film were lower compared to OMe-ROMP with the highest permeating gases being He, H₂, and CO₂ . The selectivities for all the gases were higher than OMe-ROMP which is expected given the drop in permeation. The nitrile norbornene film did plasticize in intervals and the specific plasticization pressure is higher than 5 bar which is the CO₂-induced plasticization pressure point for the OMe-nitrile norbornene ROMP one-pot copolymers. Forming a block copolymer using nitrile norbornene ROMP with OMe-ROMP has potential for securing the mechanical stability from the nitrile norbornene ROMP while maintaining the high gas transport performance from the OMe-ROMP.</Abstract>
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