Academic Journal
Role of Grafting Density and Nitrile Functionalization on Gas Transport in Polymers with Side-Chain Porosity
| العنوان: | Role of Grafting Density and Nitrile Functionalization on Gas Transport in Polymers with Side-Chain Porosity |
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| المؤلفون: | Kayla R. Storme, Sharon Lin, You-Chi Mason Wu, Sherrie X. Qian, Timothy M. Swager, Zachary P. Smith |
| سنة النشر: | 2024 |
| مصطلحات موضوعية: | Biophysics, Biochemistry, Medicine, Cell Biology, Space Science, Biological Sciences not elsewhere classified, Chemical Sciences not elsewhere classified, opening metathesis polymerization, low molecular weight, pursued wherein copolymers, containing copolymers showed, 4 , 2 , contain nitrile moieties, ladder side chains, synthesized using norbornene, ladder macromonomers, romp copolymers, norbornene resulted, norbornene content, nitrile norbornene, transport properties, study details, polymer chain, plasticization pressure, originally targeted, nn ), nitrile functionalization, lower loadings, grafting density |
| الوصف: | This study details the enhancement of CO 2 selectivity in ring-opening metathesis polymerization (ROMP) polymers that contain nitrile moieties and micropore-generating ladder side chains. A material, CN-ROMP homopolymer, with nitriles in the ladder side chains was originally targeted and synthesized; however, its low molecular weight and backbone rigidity precluded film formation. As a result, an alternative method was pursued wherein copolymers were synthesized using norbornene (N) and nitrile norbornene (NN). Herein, we report an investigation of the structure–property relationships of backbone functionalization and grafting density on the CO 2 transport properties in these ROMP polymers. Nitrile-containing copolymers showed an increase in CO 2 /CH 4 sorption selectivity and a concomitant increase in CO 2 /CH 4 permselectivity when compared to the unfunctionalized (nitrile-free) analogues. The stability in CO 2 -rich environments is enhanced as grafting density of the rigid, pore-generating side chains increases and an apparent tunability of CO 2 plasticization pressure was observed as a function of norbornene content. Lower loadings of norbornene resulted in higher plasticization pressure points. Gas permeability in the ROMP copolymers was found to correlate most strongly with the concentration of the ladder macromonomers in the polymer chain. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | unknown |
| Relation: | https://figshare.com/articles/journal_contribution/Role_of_Grafting_Density_and_Nitrile_Functionalization_on_Gas_Transport_in_Polymers_with_Side-Chain_Porosity/25325166 |
| DOI: | 10.1021/acs.macromol.3c02348.s001 |
| الاتاحة: | https://doi.org/10.1021/acs.macromol.3c02348.s001 https://figshare.com/articles/journal_contribution/Role_of_Grafting_Density_and_Nitrile_Functionalization_on_Gas_Transport_in_Polymers_with_Side-Chain_Porosity/25325166 |
| Rights: | CC BY-NC 4.0 |
| رقم الانضمام: | edsbas.AF8C3738 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1021/acs.macromol.3c02348.s001 |
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