Light-Scattering Study of Semiflexible Polymer Solutions. 4. n-Hexane Solutions of Poly(n-hexyl isocyanate)

Autor:	Osamu Teranuma, Takahiro Sato, Akio Teramoto, Yuji Jinbo, Masaaki Kanao
Rok vydání:	2002
Předmět:	Quenching Polymers and Plastics Anomalous scattering Scattering Organic Chemistry Concentration effect Thermodynamics Weak interaction Isocyanate Light scattering Inorganic Chemistry chemistry.chemical_compound chemistry Polymer chemistry Materials Chemistry Structure factor
Zdroj:	Macromolecules. 36:198-203
ISSN:	1520-5835 0024-9297
DOI:	10.1021/ma020704o
Popis:	Static light-scattering behavior was investigated for semidilute n-hexane solutions of poly(n-hexyl isocyanate) (PHIC). At 25 °C, the monomer-unit structure factor Ŝ(k) of the solutions was favorably compared with the generalized Ornstein−Zernike integral equation theory, and the strength of the attractive interaction between PHIC chains in n-hexane was estimated to be very weak. On the other hand, after the solutions were quenched at 15 °C, theoretically unexpected enhanced low-angle scattering was observed. While Ŝ(k) gradually increased with the quenching time, the anomaly disappeared by heating or diluting the solutions. The normal Ŝ(k) was also recovered by subtracting the anomalous component from Ŝ(k) of quenched solutions using dynamic light-scattering results. The anomaly in Ŝ(k) indicates the formation of aggregates or clusters of PHIC chains in quenched solutions. A strong interchain attractive interaction expected in aggregates is in a contrast with the weak interaction among molecularly disper...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::08fd749830af9b4a4863870478bbed33 https://doi.org/10.1021/ma020704o Zobrazit plný text záznamu