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NMR study of miscibility and morphology of polyimide/polyimide blends
Author(s) -
Feng Hanqiao,
Ye Chaochui,
Zhang Ping,
Sun Zhenhua,
Feng Zhiliu
Publication year - 1995
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1995.021960812
Subject(s) - miscibility , polyimide , ether , polymer chemistry , imide , materials science , intermolecular force , morphology (biology) , chemical engineering , chemistry , molecule , polymer , organic chemistry , composite material , layer (electronics) , biology , engineering , genetics
The miscibility and morphology of polyimide/polyimide blends, PEI‐E/PTI‐E PEI‐E: poly(ether imide‐ether), PTI‐E: poly(thioetherimide‐ether), PBPI‐E: poly(biphthalimide‐ether); cf. exptl. part. and PBPI‐E/PTI‐E , have been studied by means of 13 C CPMAS NMR technique. The results indicate that PEI‐E/PTI‐E blends are miscible on a molecular level, but molecular aggregation exists in pure PBPI‐E specimen as well as PBPI‐E/PTI‐E blends with high content of PBPI‐E, which vanishes in the blends with high content of PTI‐E. When the content of PBPI‐E is higher than that of PTI‐E, the addition of PTI‐E to PBPI‐E has almost no effect on the size of the PBPI‐E rigid domains, but has a large effect on the populations of the PBPI‐E rigid domains. It is the intermolecular charge‐transfer interaction that plays a critical role in the miscibility of PEI‐E/PTI‐E and PBPI‐E/PTI‐E blends.