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Rapid Commun."],"published-print":{"date-parts":[[2021,4]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Different types of polymer chains generated during the nitroxide\u2010mediated polymerization of styrene are separated for the first time, and their molecular weight distribution (MWD) is investigated. Living and dead chains are monitored during the reaction; specifically, two types of living chains derived from the initiation of the alkoxyamine (R\uf8ffT) and the self\u2010initiation of styrene and dead chains present in the as\u2010prepared polystyrene (PS). To distinguish between each polymer species, different numbers of hydroxyl groups are introduced onto the T and R groups of the alkoxyamine (one and two groups, respectively). Each living and dead chains is resolved according to the distinct number of hydroxyl groups on its chain\u2010end using high\u2010performance liquid chromatography. Molecular structures of the fractionated PS are characterized using matrix\u2010assisted laser desorption\/ionization time\u2010of\u2010flight mass spectrometry and <jats:sup>1<\/jats:sup>H nuclear magnetic resonance spectroscopy, and the results of which show two distinct initiation paths: one originating from R\uf8ffT and the other from the self\u2010initiation of styrene. Molecular weight and MWD are measured using size\u2010exclusion chromatography and reveal a narrow MWD for the living chains derived from R\uf8ffT. Contrastingly, a broad and skewed MWD is observed for the other living chains derived from the self\u2010initiation of styrene and the dead chains.<\/jats:p>","DOI":"10.1002\/marc.202000624","type":"journal-article","created":{"date-parts":[[2021,2,8]],"date-time":"2021-02-08T03:27:52Z","timestamp":1612754872000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Molecular Weight Distribution of Two Types of Living Chains Formed during Nitroxide\u2010Mediated Polymerization of Styrene"],"prefix":"10.1002","volume":"42","author":[{"given":"Kyoungho","family":"Kim","sequence":"first","affiliation":[{"name":"Department of Polymer Science and Engineering Pusan National University  Busan 46241 Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jieun","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Polymer Science and Engineering Pusan National University  Busan 46241 Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hong Y.","family":"Cho","sequence":"additional","affiliation":[{"name":"Department of Polymer Science and Engineering Pusan National University  Busan 46241 Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eun Ho","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Polymer Science and Engineering Pusan National University  Busan 46241 Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Seo\u2010Hui","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Chemistry Kwangwoon University  Seoul 01897 Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Taihyun","family":"Chang","sequence":"additional","affiliation":[{"name":"Department of Chemistry and Division of Advanced Materials Pohang University of Science and Technology (POSTECH)  Pohang 37673 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