Thermal degradation of poly( o-propionylstyrene)
The thermal degradation of poly( o-propionylstyrene) (POPS) was studied at 385°C under high vacuum. The principal reactions are removal and decomposition of the propionyl substituents, depolymerization, oligomer formation and chain scission. While the mechanism of degradation is qualitatively simila...
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| Veröffentlicht in: | Polymer degradation and stability 1988, Vol.22 (1), p.17-30 |
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| container_title | Polymer degradation and stability |
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| creator | Weir, N.A. Whiting, K. Arct, J. |
| description | The thermal degradation of poly(
o-propionylstyrene) (POPS) was studied at 385°C under high vacuum. The principal reactions are removal and decomposition of the propionyl substituents, depolymerization, oligomer formation and chain scission. While the mechanism of degradation is qualitatively similar to that of poly(styrene), the probability of transfer reactions occurring with the polymer is considerably greater, on account of the presence of ethyl and methyl radicals (derived from the propionyl groups). The resulting macroradicals undergo β-scission, and this reaction accounts for most of the chain scission (yielding a terminally unsaturated molecule and another macroradical). These two species further decompose to give (respectively) oligomeric products and monomer, the relative abundance of oligomers to monomer being about twice that observed for PS, and this has been attributed to shorter zip lengths for depolymerization and to the more likely occurrence of transfer reactions in POPS. |
| doi_str_mv | 10.1016/0141-3910(88)90053-5 |
| format | Article |
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o-propionylstyrene) (POPS) was studied at 385°C under high vacuum. The principal reactions are removal and decomposition of the propionyl substituents, depolymerization, oligomer formation and chain scission. While the mechanism of degradation is qualitatively similar to that of poly(styrene), the probability of transfer reactions occurring with the polymer is considerably greater, on account of the presence of ethyl and methyl radicals (derived from the propionyl groups). The resulting macroradicals undergo β-scission, and this reaction accounts for most of the chain scission (yielding a terminally unsaturated molecule and another macroradical). These two species further decompose to give (respectively) oligomeric products and monomer, the relative abundance of oligomers to monomer being about twice that observed for PS, and this has been attributed to shorter zip lengths for depolymerization and to the more likely occurrence of transfer reactions in POPS.</description><identifier>ISSN: 0141-3910</identifier><identifier>EISSN: 1873-2321</identifier><identifier>DOI: 10.1016/0141-3910(88)90053-5</identifier><identifier>CODEN: PDSTDW</identifier><language>eng</language><publisher>Oxford: Elsevier Ltd</publisher><subject>Applied sciences ; Chemical reactions and properties ; Degradation ; Exact sciences and technology ; Organic polymers ; Physicochemistry of polymers</subject><ispartof>Polymer degradation and stability, 1988, Vol.22 (1), p.17-30</ispartof><rights>1988</rights><rights>1989 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c364t-54cb012f2ed57cf91cd93117dceafd7772168b8fd7f0f919746ad5a9d0feb73d3</citedby><cites>FETCH-LOGICAL-c364t-54cb012f2ed57cf91cd93117dceafd7772168b8fd7f0f919746ad5a9d0feb73d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/0141-3910(88)90053-5$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,4024,27923,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=6976492$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Weir, N.A.</creatorcontrib><creatorcontrib>Whiting, K.</creatorcontrib><creatorcontrib>Arct, J.</creatorcontrib><title>Thermal degradation of poly( o-propionylstyrene)</title><title>Polymer degradation and stability</title><description>The thermal degradation of poly(
o-propionylstyrene) (POPS) was studied at 385°C under high vacuum. The principal reactions are removal and decomposition of the propionyl substituents, depolymerization, oligomer formation and chain scission. While the mechanism of degradation is qualitatively similar to that of poly(styrene), the probability of transfer reactions occurring with the polymer is considerably greater, on account of the presence of ethyl and methyl radicals (derived from the propionyl groups). The resulting macroradicals undergo β-scission, and this reaction accounts for most of the chain scission (yielding a terminally unsaturated molecule and another macroradical). These two species further decompose to give (respectively) oligomeric products and monomer, the relative abundance of oligomers to monomer being about twice that observed for PS, and this has been attributed to shorter zip lengths for depolymerization and to the more likely occurrence of transfer reactions in POPS.</description><subject>Applied sciences</subject><subject>Chemical reactions and properties</subject><subject>Degradation</subject><subject>Exact sciences and technology</subject><subject>Organic polymers</subject><subject>Physicochemistry of polymers</subject><issn>0141-3910</issn><issn>1873-2321</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1988</creationdate><recordtype>article</recordtype><recordid>eNp9UE1LAzEQDaJgrf4DD3sQsYfVZJNsNhdBil9Q8FLPIU0mGtlu1mQr7L83taVH5zLDzJv35g1ClwTfEkzqO0wYKakk-KZpZhJjTkt-hCakEbSsaEWO0eQAOUVnKX3hHIyTCcLLT4hr3RYWPqK2evChK4Ir-tCON0Uo-xj63BrbNIwROpidoxOn2wQX-zxF70-Py_lLuXh7fp0_LEpDazaUnJkVJpWrwHJhnCTGSkqIsAa0s0KIitTNqsmlw3kqBau15Vpa7GAlqKVTdL3jzRd8byANau2TgbbVHYRNUhXHsqJSZCDbAU0MKUVwqo9-reOoCFbb96itd7X1rppG_b1H8bx2tefXyejWRd0Znw67tRQ1ywJTdL-DQfb64yGqZDx0BqyPYAZlg_9f5xcv33ha</recordid><startdate>1988</startdate><enddate>1988</enddate><creator>Weir, N.A.</creator><creator>Whiting, K.</creator><creator>Arct, J.</creator><general>Elsevier Ltd</general><general>Elsevier Science</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>1988</creationdate><title>Thermal degradation of poly( o-propionylstyrene)</title><author>Weir, N.A. ; Whiting, K. ; Arct, J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c364t-54cb012f2ed57cf91cd93117dceafd7772168b8fd7f0f919746ad5a9d0feb73d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1988</creationdate><topic>Applied sciences</topic><topic>Chemical reactions and properties</topic><topic>Degradation</topic><topic>Exact sciences and technology</topic><topic>Organic polymers</topic><topic>Physicochemistry of polymers</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Weir, N.A.</creatorcontrib><creatorcontrib>Whiting, K.</creatorcontrib><creatorcontrib>Arct, J.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Polymer degradation and stability</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Weir, N.A.</au><au>Whiting, K.</au><au>Arct, J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Thermal degradation of poly( o-propionylstyrene)</atitle><jtitle>Polymer degradation and stability</jtitle><date>1988</date><risdate>1988</risdate><volume>22</volume><issue>1</issue><spage>17</spage><epage>30</epage><pages>17-30</pages><issn>0141-3910</issn><eissn>1873-2321</eissn><coden>PDSTDW</coden><abstract>The thermal degradation of poly(
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| ispartof | Polymer degradation and stability, 1988, Vol.22 (1), p.17-30 |
| issn | 0141-3910 1873-2321 |
| language | eng |
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| subjects | Applied sciences Chemical reactions and properties Degradation Exact sciences and technology Organic polymers Physicochemistry of polymers |
| title | Thermal degradation of poly( o-propionylstyrene) |
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