{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,9,17]],"date-time":"2025-09-17T15:26:01Z","timestamp":1758122761443},"reference-count":19,"publisher":"Wiley","issue":"11","license":[{"start":{"date-parts":[[2003,3,12]],"date-time":"2003-03-12T00:00:00Z","timestamp":1047427200000},"content-version":"vor","delay-in-days":5610,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Makromol. Chem."],"published-print":{"date-parts":[[1987,11]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Two samples of a statistical siloxane copolymer <jats:bold>1<\/jats:bold> having two different pendant side\u2010chains have been investigated in the liquid\u2010crystalline state using dielectric relaxation spectroscopy. Samples <jats:bold>1a<\/jats:bold> and <jats:bold>1b<\/jats:bold> differed only in the number of precipitations (3 and 12, respectively) used in the purification procedure. Sample <jats:bold>1a<\/jats:bold>, contained side\u2010chain precursor, whereas this contaminant was not detectable in sample <jats:bold>1b<\/jats:bold>. It was found that the dielectric absorption curves for homeotropically\u2010aligned and unaligned specimens of sample <jats:bold>1a<\/jats:bold>, were far broader than those observed for corresponding specimens of sample <jats:bold>1b<\/jats:bold>, and there was evidence of an extra highfrequency shoulder. In addition, the frequency\u2010temperature locations of the overall loss peak differed between the two samples, being consistent with a plasticization effect caused by residual side\u2010chain precursor in sample <jats:bold>1a<\/jats:bold>. It is shown that dielectric relaxation spectroscopy provides a convenient method for monitoring local phase separation and overall plasticization in liquid\u2010crystalline polymers caused by side\u2010chain precursor contamination.<\/jats:p>","DOI":"10.1002\/macp.1987.021881127","type":"journal-article","created":{"date-parts":[[2003,4,16]],"date-time":"2003-04-16T10:26:42Z","timestamp":1050488802000},"page":"2769-2774","source":"Crossref","is-referenced-by-count":14,"title":["The effect of contamination by side\u2010chain precursor on the molecular dynamics of a smectogenic siloxane copolymer as studied by dielectric relaxation spectroscopy"],"prefix":"10.1002","volume":"188","author":[{"given":"George Simon","family":"Attard","sequence":"first","affiliation":[]},{"given":"Joaquim J.","family":"Moura\u2010Ramos","sequence":"additional","affiliation":[]},{"given":"Graham","family":"Williams","sequence":"additional","affiliation":[]},{"given":"Gary","family":"Nestor","sequence":"additional","affiliation":[]},{"given":"Michael S.","family":"White","sequence":"additional","affiliation":[]},{"given":"George W.","family":"Gray","sequence":"additional","affiliation":[]},{"given":"David","family":"Lacey","sequence":"additional","affiliation":[]},{"given":"Kenneth J.","family":"Toyne","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":"10.1002\/macp.1978.021790130"},{"key":"e_1_2_1_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/0032-3950(77)90032-6"},{"key":"e_1_2_1_3_2","doi-asserted-by":"publisher","DOI":"10.1039\/dc9857900201"},{"key":"e_1_2_1_4_2","unstructured":"Jpn. 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