{"database":"biostudies-literature","file_versions":[],"scores":{"citationCount":0,"reanalysisCount":0,"viewCount":75,"searchCount":0},"additional":{"submitter":["Urakawa O"],"funding":["Institute for Chemical Research, Kyoto University","Japan Society for the Promotion of Science"],"pagination":["E1153"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC6680477"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["11(7)"],"pubmed_abstract":["We examined the composition and molecular weight dependence of the glass transition temperature in detail for two types of hydrogen bonding miscible blends: poly (2-vinyl pyridine)/poly (vinyl phenol) (2VPy/VPh) and poly (4-vinyl pyridine)/poly (vinyl phenol) (4VPy/VPh). Regarding the functional form of the glass transition temperature, Tg, as a function of the weight fraction, we found a weak deviation from the Kwei equation for 2VPy/VPh blends. In contrast, such a deviation was not observed for the 4VPy/VPh blend. By relating the difference in the functional forms of Tg between the two blend systems to the difference in hydrogen bonding ability, we proposed a modified version of the Kwei equation. As for the interaction parameter, q in the Kwei equation, clear molecular weight dependence was observed for 2VPy/VPh blends: the lower the VPh molecular weight in the oligomer level, the higher the q values, suggesting the higher hydrogen bonding formability near the polymer chain ends than the middle part of a polymer chain."],"journal":["Polymers"],"pubmed_title":["Glass Transition Behaviors of Poly (Vinyl Pyridine)/Poly (Vinyl Phenol) Revisited."],"pmcid":["PMC6680477"],"funding_grant_id":["2018-47","JP21350126"],"pubmed_authors":["Urakawa O","Yasue A"],"view_count":["75"],"additional_accession":[]},"is_claimable":false,"name":"Glass Transition Behaviors of Poly (Vinyl Pyridine)/Poly (Vinyl Phenol) Revisited.","description":"We examined the composition and molecular weight dependence of the glass transition temperature in detail for two types of hydrogen bonding miscible blends: poly (2-vinyl pyridine)/poly (vinyl phenol) (2VPy/VPh) and poly (4-vinyl pyridine)/poly (vinyl phenol) (4VPy/VPh). Regarding the functional form of the glass transition temperature, Tg, as a function of the weight fraction, we found a weak deviation from the Kwei equation for 2VPy/VPh blends. In contrast, such a deviation was not observed for the 4VPy/VPh blend. By relating the difference in the functional forms of Tg between the two blend systems to the difference in hydrogen bonding ability, we proposed a modified version of the Kwei equation. As for the interaction parameter, q in the Kwei equation, clear molecular weight dependence was observed for 2VPy/VPh blends: the lower the VPh molecular weight in the oligomer level, the higher the q values, suggesting the higher hydrogen bonding formability near the polymer chain ends than the middle part of a polymer chain.","dates":{"release":"2019-01-01T00:00:00Z","publication":"2019 Jul","modification":"2024-11-11T19:16:29.858Z","creation":"2019-08-13T07:03:13Z"},"accession":"S-EPMC6680477","cross_references":{"pubmed":["31284499"],"doi":["10.3390/polym11071153"]}}