Structure, Morphology, and Properties of Methyl-Pendant Poly(p-phenylene benzobisimidazole) and Methyl-Pendant Poly(p-phenylene benzobisthiazole)

Autor:	Malcolm B. Polk, Thuy D. Dang, Karl I. Jacob, Fred E. Arnold, Shawn E. Jenkins, Satish Kumar
Rok vydání:	2000
Předmět:	chemistry.chemical_classification Polymers and Plastics Hydrogen bond Organic Chemistry Intermolecular force Polymer Crystal structure Inorganic Chemistry Crystal symbols.namesake chemistry Poly(p-phenylene) Polymer chemistry Materials Chemistry symbols Thermal stability van der Waals force
Zdroj:	Macromolecules. 33:8731-8738
ISSN:	1520-5835 0024-9297
DOI:	10.1021/ma000790x
Popis:	Monomethyl-pendant poly(p-phenylene benzobisimidazole) (MePBI) has been spun into fiber and compared with an analogous methyl-pendant poly(p-phenylene benzobisthiazole) (MePBZT). From FTIR and WAXD, the former system has been found to exhibit intermolecular hydrogen bonding, while the latter possesses only weak van der Waals interactions. The thermomechanical properties of both systems, as examined by TGA, TMA, and DMS, are presented and discussed. A crystal structure of MePBI is proposed, which suggests intermolecular hydrogen bonding only between pairs of chains within the MePBI crystal. As compared to MePBZT and other rigid-rod polymers where the intermolecular hydrogen bond is not present, MePBI has higher compressive strength. The relatively high compressive strength of MePBI is attributed to increased intermolecular association, as opposed to differences in morphology.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8c1ac4ee708f398c25886b31bfe61e9f https://doi.org/10.1021/ma000790x Zobrazit plný text záznamu