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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my-usm-ep.419432019-04-12T05:27:00Z Effect Of Organic Solvent On The Entrapment Of 25 Mole Percent Epoxidized Natural Rubber In Preformed Cyclomatrix Poly(1,3-Dioxybenzene) Cyclotriphosphazenes 2009-11 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 http://eprints.usm.my/41943/ http://eprints.usm.my/41943/1/OH_CHENG_CHEOW_HJ.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Sains Kimia |
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Universiti Sains Malaysia |
| collection |
USM Institutional Repository |
| language |
English |
| topic |
QD1-65 General Including alchemy |
| 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 |
| 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. |
| format |
Thesis |
| qualification_level |
Master's degree |
| author |
Oh , Cheng Cheow |
| author_facet |
Oh , Cheng Cheow |
| author_sort |
Oh , Cheng Cheow |
| title |
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_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_sort |
effect of organic solvent on the
entrapment of 25 mole percent
epoxidized natural rubber in preformed
cyclomatrix poly(1,3-dioxybenzene)
cyclotriphosphazenes |
| granting_institution |
Universiti Sains Malaysia |
| granting_department |
Pusat Pengajian Sains Kimia |
| publishDate |
2009 |
| url |
http://eprints.usm.my/41943/1/OH_CHENG_CHEOW_HJ.pdf |
| _version_ |
1747821001744318464 |