Characterization of poly(amic acid)s and resulted polyimides bearing azobenzene moieties including investigations of thermal imidization kinetic and photoinduced anisotropy
PBN-AR
Instytucja
Centrum Materiałów Polimerowych i Węglowych Polskiej Akademii Nauk
Informacje podstawowe
Główny język publikacji
en
Czasopismo
Polymer International
ISSN
0959-8103
EISSN
Wydawca
WILEY-BLACKWELL
Rok publikacji
2015
Numer zeszytu
1
Strony od-do
76-87
Numer tomu
64
Identyfikator DOI
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Autorzy
Pozostali autorzy
+ 2
Autorzy przekładu
(liczba autorów przekładu: 0)
Słowa kluczowe
en
azopolymers;
poly(amic acid)s;
polyimides;
surface relief gratings;
imidization
en
SURFACE-RELIEF GRATINGS;
OPTICAL ANISOTROPY;
FUNCTIONALIZED POLYMERS;
AROMATIC POLYIMIDES;
HEATING RATE;
SIDE-GROUPS;
AZO-DYES;
FILMS;
BEHAVIOR;
BIREFRINGENCE
Streszczenia
Język
en
Treść
Azobenzene-containing poly(amic acid)s and resulting polyimides were synthesized. Polymers differed in the polymer backbone structure and the position at which the azobenzene group was attached to the polymer chain. Polymers were characterized and evaluated using Fourier transform infrared, H-1 NMR and UV-visible spectroscopies, X-ray diffraction, differential scanning calorimetry (DSC) and thermogravimetric analysis. Polyimides revealed glass transition temperatures in the range 160-265 degrees C, and thermal stability with decomposition temperatures in the range 336-444 degrees C. The thermal imidization kinetics of poly(amic acid)s was investigated by means of DSC. Kinetic parameters, such as the activation energy (E) and the frequency factor, were estimated using the Ozawa and Kissinger models. The values of E, determined using both methods, were in the range 142.52-200.92 kJmol(-1). The photoinduced optical anisotropy (POA) was studied in the obtained azopolymers using a holographic grating recording technique. Surface relief gratings, which appeared after light exposure, were observed using atomic force microscopy. For the first time to the best of our knowledge, photoinduced anisotropy in poly(amic acid)s was studied and compared with POA in their polyimide analogues. (c) 2014 Society of Chemical Industry
Cechy publikacji
oryginalny artykuł naukowy
Inne
System-identifier
PX-56b463548106eb71826e40ff
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