{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,21]],"date-time":"2025-10-21T14:41:20Z","timestamp":1761057680489},"reference-count":93,"publisher":"Wiley","issue":"9","license":[{"start":{"date-parts":[[2003,3,12]],"date-time":"2003-03-12T00:00:00Z","timestamp":1047427200000},"content-version":"vor","delay-in-days":2383,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Macro Chemistry &amp; Physics"],"published-print":{"date-parts":[[1996,9]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Unlike previous attempts, the entire cycle of melting\u2010 and crystallization\u2010induced reordering is realized in binary polymer blends in the following order: two homopolymers \u2192 block copolymer \u2192 random copolymer \u2192 block copolymer. Blends of poly(ethylene terephthalate)<jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"#note1\" \/><jats:fn><jats:p>Systematic IUPAC name: poly(oxyethyleneoxyterephthaloyl).<\/jats:p><\/jats:fn>\n (PET) and bisphenol\u2010A\/polycarbonate (PC) as well as PET\/polyarylate (PAr) blends, are annealed directly in a differential scanning calorimeter at 280\u00b0C for various times. Scanning the samples in the heating mode reveals the complete disappearance of crystallization or melting in the blends where the ratio of PET\/PC repeating units is less than 5.7\/1.0. Such an amorphization is attributed to the formation of random copolymers. This statement is confirmed by NMR measurements, by the observation of one glass transition temperature <jats:italic>T<\/jats:italic><jats:sub>g<\/jats:sub> in the range between the initial two <jats:italic>T<\/jats:italic><jats:sub>g<\/jats:sub>s, and by solubility tests. Once randomized, annealing the samples at 235\u00b0C and 245\u00b0C, i. e., below melting of PET, results in a <jats:italic>T<\/jats:italic><jats:sub>g<\/jats:sub> shift toward the <jats:italic>T<\/jats:italic><jats:sub>g<\/jats:sub> of PET as well as in reappearance of melting. This effect is accompanied by an eight\u2010fold crystallinity increase in the equimolar blend, as compared to the randomized sample. The regenerated crystallization ability is explained by restoration of the blocks. According to previous findings, it is concluded that the considerable enthropy increase is the main driving force of randomization. The rival trend to the formation of a block copolymer by sequential reordering is driven by the crystallization of PET blocks formed. The conclusion that the observed changes in the crystallization ability and <jats:italic>T<\/jats:italic><jats:sub>g<\/jats:sub>\u2010values are based on sequential reordering is supported by experiments with samples containing increased amounts of transesterification catalyst leading to a much faster appearance of these changes. No randomization is observed with the blend composition ratio of repeating units PET\/PC &gt; 5.7\/1.0. When the annealing is performed for 300 min at 165\u00b0C, where no significant exchange reactions are expected to occur, no restoration of the crystallization ability is observed.<\/jats:p>","DOI":"10.1002\/macp.1996.021970921","type":"journal-article","created":{"date-parts":[[2003,4,17]],"date-time":"2003-04-17T10:06:42Z","timestamp":1050574002000},"page":"2837-2867","source":"Crossref","is-referenced-by-count":36,"title":["Sequential reordering in condensation copolymers, 1. Melting\u2010 and crystallization\u2010induced sequential reordering in immiscible blends of poly(ethylene terephthalate) with polycarbonate or polyarylate"],"prefix":"10.1002","volume":"197","author":[{"given":"Stoyko","family":"Fakirov","sequence":"first","affiliation":[]},{"given":"Marianna","family":"Sarkissova","sequence":"additional","affiliation":[]},{"given":"Zlatan","family":"Denchev","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2003,3,12]]},"reference":[{"key":"e_1_2_1_1_2","doi-asserted-by":"publisher","DOI":"10.1021\/bk-1989-0395.ch001"},{"key":"e_1_2_1_2_2","first-page":"127","volume-title":"Principles of Polymer Chemistry","author":"Flory J.","year":"1953"},{"key":"e_1_2_1_3_2","first-page":"59","volume-title":"Solid State Behavior of Linear Polyesters and Polyamides","author":"Fakirov S.","year":"1990"},{"key":"e_1_2_1_4_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja01261a049"},{"key":"e_1_2_1_5_2","doi-asserted-by":"publisher","DOI":"10.1002\/app.1985.070300330"},{"key":"e_1_2_1_6_2","doi-asserted-by":"publisher","DOI":"10.1002\/pol.1982.180201013"},{"key":"e_1_2_1_7_2","doi-asserted-by":"publisher","DOI":"10.1002\/pola.1986.080241215"},{"key":"e_1_2_1_8_2","doi-asserted-by":"publisher","DOI":"10.1021\/ma00045a042"},{"key":"e_1_2_1_9_2","doi-asserted-by":"publisher","DOI":"10.1002\/macp.1992.021930710"},{"key":"e_1_2_1_10_2","doi-asserted-by":"publisher","DOI":"10.1002\/pen.760220403"},{"key":"e_1_2_1_11_2","doi-asserted-by":"publisher","DOI":"10.1002\/pol.1981.230160106"},{"key":"e_1_2_1_12_2","doi-asserted-by":"publisher","DOI":"10.1016\/0032-3861(92)90866-U"},{"key":"e_1_2_1_13_2","doi-asserted-by":"publisher","DOI":"10.1002\/macp.1992.021930711"},{"key":"e_1_2_1_14_2","doi-asserted-by":"publisher","DOI":"10.1016\/0032-3861(88)90324-2"},{"key":"e_1_2_1_15_2","doi-asserted-by":"publisher","DOI":"10.1002\/app.1984.070290517"},{"key":"e_1_2_1_16_2","doi-asserted-by":"publisher","DOI":"10.1002\/pen.760291803"},{"key":"e_1_2_1_17_2","doi-asserted-by":"publisher","DOI":"10.1002\/pen.760300109"},{"key":"e_1_2_1_18_2","doi-asserted-by":"publisher","DOI":"10.1080\/00222349008245771"},{"key":"e_1_2_1_19_2","doi-asserted-by":"publisher","DOI":"10.1002\/masy.19910520113"},{"key":"e_1_2_1_20_2","doi-asserted-by":"publisher","DOI":"10.1016\/0032-3861(86)90200-4"},{"key":"e_1_2_1_21_2","doi-asserted-by":"publisher","DOI":"10.1002\/app.1991.070420221"},{"key":"e_1_2_1_22_2","doi-asserted-by":"publisher","DOI":"10.1002\/app.1981.070261223"},{"key":"e_1_2_1_23_2","doi-asserted-by":"publisher","DOI":"10.1016\/0032-3861(93)90667-Y"},{"issue":"2","key":"e_1_2_1_24_2","first-page":"180","volume":"21","author":"Kotliar A. M.","year":"1980","journal-title":"Polym. Prepr. (Am. Chem. Soc., Div. Polym. Chem.)"},{"key":"e_1_2_1_25_2","first-page":"137","volume":"26","author":"Fakirov S.","year":"1985","journal-title":"Polym. Commun."},{"key":"e_1_2_1_26_2","doi-asserted-by":"publisher","DOI":"10.1002\/pol.1984.180221208"},{"key":"e_1_2_1_27_2","doi-asserted-by":"publisher","DOI":"10.1002\/macp.1984.021850810"},{"key":"e_1_2_1_28_2","doi-asserted-by":"publisher","DOI":"10.1002\/polb.1987.090250611"},{"key":"e_1_2_1_29_2","doi-asserted-by":"publisher","DOI":"10.1002\/apmc.1986.051400105"},{"key":"e_1_2_1_30_2","doi-asserted-by":"publisher","DOI":"10.1080\/00222349008245772"},{"key":"e_1_2_1_31_2","doi-asserted-by":"publisher","DOI":"10.1002\/pol.1971.150091218"},{"key":"e_1_2_1_32_2","doi-asserted-by":"publisher","DOI":"10.1021\/ie00088a015"},{"key":"e_1_2_1_33_2","doi-asserted-by":"publisher","DOI":"10.1002\/app.1990.070400529"},{"key":"e_1_2_1_34_2","doi-asserted-by":"publisher","DOI":"10.1002\/app.1990.070400530"},{"key":"e_1_2_1_35_2","unstructured":"U.S. Pat. 3 752 866 (1973) Triber Industries inv.:"},{"key":"e_1_2_1_35_3","first-page":"4773i","volume":"80","author":"Doerr M. L.","year":"1974","journal-title":"Chem. Abstr."},{"key":"e_1_2_1_36_2","first-page":"127","volume":"31","author":"Valero M.","year":"1990","journal-title":"Polym. Commun."},{"key":"e_1_2_1_37_2","doi-asserted-by":"publisher","DOI":"10.1002\/pol.1982.180201011"},{"key":"e_1_2_1_38_2","doi-asserted-by":"publisher","DOI":"10.1002\/pola.1986.080241214"},{"key":"e_1_2_1_39_2","first-page":"169","volume":"28","author":"Vel'den G. v. d.","year":"1987","journal-title":"Polym. Commun."},{"key":"e_1_2_1_40_2","first-page":"395","volume":"2","author":"Li H.","year":"1982","journal-title":"MMI Press Symp. Ser."},{"key":"e_1_2_1_41_2","doi-asserted-by":"publisher","DOI":"10.1021\/ma00183a018"},{"key":"e_1_2_1_42_2","doi-asserted-by":"publisher","DOI":"10.1016\/0032-3861(93)90033-7"},{"key":"e_1_2_1_43_2","doi-asserted-by":"publisher","DOI":"10.1002\/app.1978.070220808"},{"key":"e_1_2_1_44_2","doi-asserted-by":"publisher","DOI":"10.1007\/BF00263454"},{"key":"e_1_2_1_45_2","doi-asserted-by":"publisher","DOI":"10.1007\/BF00955717"},{"key":"e_1_2_1_46_2","doi-asserted-by":"publisher","DOI":"10.1002\/pi.4980170308"},{"key":"e_1_2_1_47_2","doi-asserted-by":"publisher","DOI":"10.1016\/0032-3861(89)90089-X"},{"key":"e_1_2_1_48_2","doi-asserted-by":"publisher","DOI":"10.1007\/BF01154581"},{"key":"e_1_2_1_49_2","doi-asserted-by":"publisher","DOI":"10.1016\/0032-3861(88)90269-8"},{"key":"e_1_2_1_50_2","doi-asserted-by":"publisher","DOI":"10.1002\/pen.760280207"},{"key":"e_1_2_1_51_2","doi-asserted-by":"publisher","DOI":"10.1016\/0032-3861(90)90183-Y"},{"key":"e_1_2_1_52_2","doi-asserted-by":"publisher","DOI":"10.1002\/macp.1989.021900322"},{"key":"e_1_2_1_53_2","doi-asserted-by":"publisher","DOI":"10.1002\/app.1979.070230108"},{"key":"e_1_2_1_54_2","doi-asserted-by":"publisher","DOI":"10.1002\/app.1984.070291102"},{"key":"e_1_2_1_55_2","doi-asserted-by":"publisher","DOI":"10.1007\/BF00265729"},{"key":"e_1_2_1_56_2","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-642-74434-1"},{"key":"e_1_2_1_57_2","doi-asserted-by":"publisher","DOI":"10.1016\/0032-3861(95)97335-D"},{"key":"e_1_2_1_58_2","doi-asserted-by":"publisher","DOI":"10.1002\/pol.1983.180210304"},{"key":"e_1_2_1_59_2","doi-asserted-by":"publisher","DOI":"10.1016\/0032-3861(86)90039-X"},{"key":"e_1_2_1_60_2","doi-asserted-by":"publisher","DOI":"10.1016\/0032-3861(86)90108-4"},{"key":"e_1_2_1_61_2","doi-asserted-by":"publisher","DOI":"10.1021\/ma00171a041"},{"key":"e_1_2_1_62_2","doi-asserted-by":"publisher","DOI":"10.1002\/pol.1973.170111113"},{"key":"e_1_2_1_63_2","doi-asserted-by":"publisher","DOI":"10.1002\/pol.1974.170120101"},{"key":"e_1_2_1_64_2","doi-asserted-by":"publisher","DOI":"10.1016\/0032-3861(85)90304-0"},{"key":"e_1_2_1_65_2","doi-asserted-by":"publisher","DOI":"10.1016\/0032-3861(83)90272-0"},{"key":"e_1_2_1_66_2","doi-asserted-by":"publisher","DOI":"10.1021\/ma00208a041"},{"key":"e_1_2_1_67_2","doi-asserted-by":"publisher","DOI":"10.1002\/macp.1978.021790909"},{"key":"e_1_2_1_68_2","first-page":"V\/102","volume-title":"Polymer Handbook","author":"Lawton F. L.","year":"1989"},{"key":"e_1_2_1_69_2","doi-asserted-by":"publisher","DOI":"10.1002\/app.1994.070521004"},{"key":"e_1_2_1_70_2","doi-asserted-by":"publisher","DOI":"10.1016\/0032-3861(92)90427-X"},{"key":"e_1_2_1_71_2","doi-asserted-by":"publisher","DOI":"10.1002\/pol.1982.180201010"},{"key":"e_1_2_1_72_2","doi-asserted-by":"publisher","DOI":"10.1016\/0040-6031(88)85244-4"},{"key":"e_1_2_1_73_2","doi-asserted-by":"publisher","DOI":"10.1002\/app.1985.070301011"},{"key":"e_1_2_1_74_2","first-page":"177","volume":"2","author":"Robenson L.","year":"1982","journal-title":"MMI Press Symp. Ser."},{"key":"e_1_2_1_75_2","doi-asserted-by":"publisher","DOI":"10.1002\/pol.1982.170200722"},{"key":"e_1_2_1_76_2","unstructured":"M.Evstatiev N.Nickolov S.Fakirov Polymer submitted"},{"key":"e_1_2_1_77_2","doi-asserted-by":"publisher","DOI":"10.1002\/adma.19940060513"},{"key":"e_1_2_1_78_2","doi-asserted-by":"publisher","DOI":"10.1016\/0032-3861(93)90700-K"},{"key":"e_1_2_1_79_2","first-page":"417","article-title":"Interfacial Chemical Interactions in Condensation Polymeric Composites","volume":"230","author":"Fakirov S.","year":"1990","journal-title":"The Interfacial Interactions in Polymeric Composites"},{"key":"e_1_2_1_80_2","doi-asserted-by":"publisher","DOI":"10.1021\/ma00071a038"},{"key":"e_1_2_1_81_2","doi-asserted-by":"publisher","DOI":"10.1021\/bk-1990-0435.ch010"},{"key":"e_1_2_1_82_2","unstructured":"C. W.Potter J. C.Lim G.Serpe J.Economy Preprint of the PPP\u20103 Conference (1993)"},{"key":"e_1_2_1_83_2","unstructured":"T.Pakula private communication"},{"key":"e_1_2_1_84_2","unstructured":"M.Stamm private communication"},{"key":"e_1_2_1_85_2","first-page":"45","volume-title":"Kinetics of Crystallization Phenomena of Spherulites in Poly(ethylene Terephthalate)","author":"van Atwerpen F.","year":"1971"},{"key":"e_1_2_1_86_2","doi-asserted-by":"publisher","DOI":"10.1002\/polc.5070060113"},{"key":"e_1_2_1_87_2","doi-asserted-by":"publisher","DOI":"10.1021\/ma00177a028"},{"key":"e_1_2_1_88_2","doi-asserted-by":"publisher","DOI":"10.1007\/BF02396639"},{"key":"e_1_2_1_89_2","doi-asserted-by":"publisher","DOI":"10.1016\/0032-3861(77)90105-7"},{"key":"e_1_2_1_90_2","doi-asserted-by":"publisher","DOI":"10.1080\/00914039208034813"},{"key":"e_1_2_1_91_2","doi-asserted-by":"publisher","DOI":"10.1080\/00914039408029337"},{"key":"e_1_2_1_92_2","doi-asserted-by":"publisher","DOI":"10.1002\/macp.1996.021970923"}],"container-title":["Macromolecular Chemistry and Physics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1002%2Fmacp.1996.021970921","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/macp.1996.021970921","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,10,26]],"date-time":"2023-10-26T22:15:53Z","timestamp":1698358553000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/macp.1996.021970921"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1996,9]]},"references-count":93,"journal-issue":{"issue":"9","published-print":{"date-parts":[[1996,9]]}},"alternative-id":["10.1002\/macp.1996.021970921"],"URL":"https:\/\/doi.org\/10.1002\/macp.1996.021970921","archive":["Portico"],"relation":{},"ISSN":["1022-1352","1521-3935"],"issn-type":[{"value":"1022-1352","type":"print"},{"value":"1521-3935","type":"electronic"}],"subject":[],"published":{"date-parts":[[1996,9]]}}}