Effect of preparation method on the properties of poly(methyl methacrylate)/mesoporous silica composites
<p>The preparation method of a polymer composite and the filler loading are amongst the factors that influence the properties of the final composites. This article studies the effect of these factors on the thermal stability and thermal degradation kinetics of poly(methyl methacrylate) (PMMA)/...
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| مؤلفون آخرون: | , , , |
| منشور في: |
2019
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| _version_ | 1864513567093424128 |
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| author | M. A. Sibeko (14152350) |
| author2 | M. L. Saladino (10151618) F. Armetta (10151624) A. Spinella (10151633) A. S. Luyt (14152353) |
| author2_role | author author author author |
| author_facet | M. A. Sibeko (14152350) M. L. Saladino (10151618) F. Armetta (10151624) A. Spinella (10151633) A. S. Luyt (14152353) |
| author_role | author |
| dc.creator.none.fl_str_mv | M. A. Sibeko (14152350) M. L. Saladino (10151618) F. Armetta (10151624) A. Spinella (10151633) A. S. Luyt (14152353) |
| dc.date.none.fl_str_mv | 2019-11-06T21:00:00Z |
| dc.identifier.none.fl_str_mv | 10.1007/s42247-019-00057-1 |
| dc.relation.none.fl_str_mv | https://figshare.com/articles/journal_contribution/Effect_of_preparation_method_on_the_properties_of_poly_methyl_methacrylate_mesoporous_silica_composites/21597897 |
| dc.rights.none.fl_str_mv | CC BY 4.0 info:eu-repo/semantics/openAccess |
| dc.subject.none.fl_str_mv | Engineering Environmental engineering Poly(methyl methacrylate) (PMMA) Mesoporous silica (MCM-41) In situ polymerisation Melt mixing Thermal degradation kinetics 13C {1H} CP-MAS-NMR |
| dc.title.none.fl_str_mv | Effect of preparation method on the properties of poly(methyl methacrylate)/mesoporous silica composites |
| dc.type.none.fl_str_mv | Text Journal contribution info:eu-repo/semantics/publishedVersion text contribution to journal |
| description | <p>The preparation method of a polymer composite and the filler loading are amongst the factors that influence the properties of the final composites. This article studies the effect of these factors on the thermal stability and thermal degradation kinetics of poly(methyl methacrylate) (PMMA)/mesoporous silica (MCM-41) composites filled with small amounts of MCM-41. The PMMA/MCM-41 composites were prepared through in situ polymerisation and melt mixing methods, with MCM-41 loadings of 0.1, 0.3, and 0.5 wt.%. The presence of MCM-41 increased the thermal stability of PMMA/MCM-41 composites prepared by melt mixing, but in the case of the in situ polymerised samples, the MCM-41 accelerated the degradation of the polymer. As a result, the activation energy was low and less energy was required to initiate and propagate the degradation process of these composites. The small-angle X-ray scattering (SAXS) measurements showed that the preparation method of the composites had no influence on the pore size of MCM-41, but the PMMAs used in the two methods both had shorter chains than the MCM-41 pore size. This allowed the polymer chains to be trapped inside the pores of the filler and be immobilised, as was observed from nuclear magnetic resonance (NMR) spectroscopy. The immobilisation of the polymer chains was more significant in the in situ polymerised samples.</p><h2>Other Information</h2> <p> Published in: Emergent Materials<br> License: <a href="https://creativecommons.org/licenses/by/4.0" target="_blank">https://creativecommons.org/licenses/by/4.0</a><br>See article on publisher's website: <a href="http://dx.doi.org/10.1007/s42247-019-00057-1" target="_blank">http://dx.doi.org/10.1007/s42247-019-00057-1</a></p> |
| eu_rights_str_mv | openAccess |
| id | Manara2_c897e4b0f8a5ab5599e8101afb9a6388 |
| identifier_str_mv | 10.1007/s42247-019-00057-1 |
| network_acronym_str | Manara2 |
| network_name_str | Manara2 |
| oai_identifier_str | oai:figshare.com:article/21597897 |
| publishDate | 2019 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | CC BY 4.0 |
| spelling | Effect of preparation method on the properties of poly(methyl methacrylate)/mesoporous silica compositesM. A. Sibeko (14152350)M. L. Saladino (10151618)F. Armetta (10151624)A. Spinella (10151633)A. S. Luyt (14152353)EngineeringEnvironmental engineeringPoly(methyl methacrylate) (PMMA)Mesoporous silica (MCM-41)In situ polymerisationMelt mixingThermal degradation kinetics13C {1H} CP-MAS-NMR<p>The preparation method of a polymer composite and the filler loading are amongst the factors that influence the properties of the final composites. This article studies the effect of these factors on the thermal stability and thermal degradation kinetics of poly(methyl methacrylate) (PMMA)/mesoporous silica (MCM-41) composites filled with small amounts of MCM-41. The PMMA/MCM-41 composites were prepared through in situ polymerisation and melt mixing methods, with MCM-41 loadings of 0.1, 0.3, and 0.5 wt.%. The presence of MCM-41 increased the thermal stability of PMMA/MCM-41 composites prepared by melt mixing, but in the case of the in situ polymerised samples, the MCM-41 accelerated the degradation of the polymer. As a result, the activation energy was low and less energy was required to initiate and propagate the degradation process of these composites. The small-angle X-ray scattering (SAXS) measurements showed that the preparation method of the composites had no influence on the pore size of MCM-41, but the PMMAs used in the two methods both had shorter chains than the MCM-41 pore size. This allowed the polymer chains to be trapped inside the pores of the filler and be immobilised, as was observed from nuclear magnetic resonance (NMR) spectroscopy. The immobilisation of the polymer chains was more significant in the in situ polymerised samples.</p><h2>Other Information</h2> <p> Published in: Emergent Materials<br> License: <a href="https://creativecommons.org/licenses/by/4.0" target="_blank">https://creativecommons.org/licenses/by/4.0</a><br>See article on publisher's website: <a href="http://dx.doi.org/10.1007/s42247-019-00057-1" target="_blank">http://dx.doi.org/10.1007/s42247-019-00057-1</a></p>2019-11-06T21:00:00ZTextJournal contributioninfo:eu-repo/semantics/publishedVersiontextcontribution to journal10.1007/s42247-019-00057-1https://figshare.com/articles/journal_contribution/Effect_of_preparation_method_on_the_properties_of_poly_methyl_methacrylate_mesoporous_silica_composites/21597897CC BY 4.0info:eu-repo/semantics/openAccessoai:figshare.com:article/215978972019-11-06T21:00:00Z |
| spellingShingle | Effect of preparation method on the properties of poly(methyl methacrylate)/mesoporous silica composites M. A. Sibeko (14152350) Engineering Environmental engineering Poly(methyl methacrylate) (PMMA) Mesoporous silica (MCM-41) In situ polymerisation Melt mixing Thermal degradation kinetics 13C {1H} CP-MAS-NMR |
| status_str | publishedVersion |
| title | Effect of preparation method on the properties of poly(methyl methacrylate)/mesoporous silica composites |
| title_full | Effect of preparation method on the properties of poly(methyl methacrylate)/mesoporous silica composites |
| title_fullStr | Effect of preparation method on the properties of poly(methyl methacrylate)/mesoporous silica composites |
| title_full_unstemmed | Effect of preparation method on the properties of poly(methyl methacrylate)/mesoporous silica composites |
| title_short | Effect of preparation method on the properties of poly(methyl methacrylate)/mesoporous silica composites |
| title_sort | Effect of preparation method on the properties of poly(methyl methacrylate)/mesoporous silica composites |
| topic | Engineering Environmental engineering Poly(methyl methacrylate) (PMMA) Mesoporous silica (MCM-41) In situ polymerisation Melt mixing Thermal degradation kinetics 13C {1H} CP-MAS-NMR |