Effect Of Organic Solvent On The Entrapment Of 25 Mole Percent Epoxidized Natural Rubber In Preformed Cyclomatrix Poly(1,3-Dioxybenzene) Cyclotriphosphazenes
Blending of 25 mole percent epoxidized natural rubber (ENR-25) with preformed cyclomatrix poly(1,3-dioxybenzene)cyclotriphosphazene (P5) was carried out in toluene, methylene chloride, tetrahydrofuran, cyclohexane and 1,4-dioxane. Entrapment studies with the aid of Differential Scanning Calorimet...
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| Format: | Thesis |
| Language: | English |
| Published: |
2009
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| Subjects: | |
| Online Access: | http://eprints.usm.my/41943/ http://eprints.usm.my/41943/1/OH_CHENG_CHEOW_HJ.pdf |
| _version_ | 1848879427141763072 |
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| author | Oh , Cheng Cheow |
| author_facet | Oh , Cheng Cheow |
| author_sort | Oh , Cheng Cheow |
| building | USM Institutional Repository |
| collection | Online Access |
| description | Blending of 25 mole percent epoxidized natural rubber (ENR-25) with preformed
cyclomatrix poly(1,3-dioxybenzene)cyclotriphosphazene (P5) was carried out in toluene,
methylene chloride, tetrahydrofuran, cyclohexane and 1,4-dioxane. Entrapment studies
with the aid of Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis
(TGA) revealed that P5 can trap ENR-25 chains. The DSC and TGA data for [P5/ENR-25]b
synthesized in all the studied solvents except toluene, revealed the presence of untrapped
ENR-25. No untrapped ENR-25 is obtained in the DSC and TGA analysis results of the
product synthesized in toluene, [P5/ENR-25]b-Toluene. As such, it can be concluded that
synthesis in toluene lead to complete entrapment of ENR-25 in P5. The swelling of P5 in
toluene facilitates the effective entrapment of ENR-25 chains into P5. The results of DSC
analysis revealed the improvement in thermal properties of [P5/ENR-25]b-Toluene, with
higher melting temperature (Tm) of 125 oC, as compared to that of the starting materials
(with Tm of 117 oC for P5 and Tg of -44 oC for ENR-25). The results of FTIR analysis of
the different products revealed no change in the functional groups of the ENR-25 entrapped
in P5, as indicated by the insignificant shift of the absorption frequencies. Therefore it is likely that there is no chemical reaction involve in the entrapment of the ENR-25 chains in
P5. |
| first_indexed | 2025-11-15T17:47:03Z |
| format | Thesis |
| id | usm-41943 |
| institution | Universiti Sains Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T17:47:03Z |
| publishDate | 2009 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | usm-419432019-04-12T05:27:00Z http://eprints.usm.my/41943/ Effect Of Organic Solvent On The Entrapment Of 25 Mole Percent Epoxidized Natural Rubber In Preformed Cyclomatrix Poly(1,3-Dioxybenzene) Cyclotriphosphazenes Oh , Cheng Cheow QD1-65 General Including alchemy Blending of 25 mole percent epoxidized natural rubber (ENR-25) with preformed cyclomatrix poly(1,3-dioxybenzene)cyclotriphosphazene (P5) was carried out in toluene, methylene chloride, tetrahydrofuran, cyclohexane and 1,4-dioxane. Entrapment studies with the aid of Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA) revealed that P5 can trap ENR-25 chains. The DSC and TGA data for [P5/ENR-25]b synthesized in all the studied solvents except toluene, revealed the presence of untrapped ENR-25. No untrapped ENR-25 is obtained in the DSC and TGA analysis results of the product synthesized in toluene, [P5/ENR-25]b-Toluene. As such, it can be concluded that synthesis in toluene lead to complete entrapment of ENR-25 in P5. The swelling of P5 in toluene facilitates the effective entrapment of ENR-25 chains into P5. The results of DSC analysis revealed the improvement in thermal properties of [P5/ENR-25]b-Toluene, with higher melting temperature (Tm) of 125 oC, as compared to that of the starting materials (with Tm of 117 oC for P5 and Tg of -44 oC for ENR-25). The results of FTIR analysis of the different products revealed no change in the functional groups of the ENR-25 entrapped in P5, as indicated by the insignificant shift of the absorption frequencies. Therefore it is likely that there is no chemical reaction involve in the entrapment of the ENR-25 chains in P5. 2009-11 Thesis NonPeerReviewed application/pdf en http://eprints.usm.my/41943/1/OH_CHENG_CHEOW_HJ.pdf Oh , Cheng Cheow (2009) Effect Of Organic Solvent On The Entrapment Of 25 Mole Percent Epoxidized Natural Rubber In Preformed Cyclomatrix Poly(1,3-Dioxybenzene) Cyclotriphosphazenes. Masters thesis, Universiti Sains Malaysia. |
| spellingShingle | QD1-65 General Including alchemy Oh , Cheng Cheow Effect Of Organic Solvent On The Entrapment Of 25 Mole Percent Epoxidized Natural Rubber In Preformed Cyclomatrix Poly(1,3-Dioxybenzene) Cyclotriphosphazenes |
| title | Effect Of Organic Solvent On The
Entrapment Of 25 Mole Percent
Epoxidized Natural Rubber In Preformed
Cyclomatrix Poly(1,3-Dioxybenzene)
Cyclotriphosphazenes
|
| title_full | Effect Of Organic Solvent On The
Entrapment Of 25 Mole Percent
Epoxidized Natural Rubber In Preformed
Cyclomatrix Poly(1,3-Dioxybenzene)
Cyclotriphosphazenes
|
| title_fullStr | Effect Of Organic Solvent On The
Entrapment Of 25 Mole Percent
Epoxidized Natural Rubber In Preformed
Cyclomatrix Poly(1,3-Dioxybenzene)
Cyclotriphosphazenes
|
| title_full_unstemmed | Effect Of Organic Solvent On The
Entrapment Of 25 Mole Percent
Epoxidized Natural Rubber In Preformed
Cyclomatrix Poly(1,3-Dioxybenzene)
Cyclotriphosphazenes
|
| title_short | Effect Of Organic Solvent On The
Entrapment Of 25 Mole Percent
Epoxidized Natural Rubber In Preformed
Cyclomatrix Poly(1,3-Dioxybenzene)
Cyclotriphosphazenes
|
| title_sort | effect of organic solvent on the
entrapment of 25 mole percent
epoxidized natural rubber in preformed
cyclomatrix poly(1,3-dioxybenzene)
cyclotriphosphazenes |
| topic | QD1-65 General Including alchemy |
| url | http://eprints.usm.my/41943/ http://eprints.usm.my/41943/1/OH_CHENG_CHEOW_HJ.pdf |