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Molecular packing and properties of poly(benzoxazole-benzimidazole-imide)
copolymers
Y.-B. Zhuang, X.-Y. Liu and Y. Gu, Polym. Chem., 2012, 3, 1517-1525.
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lhy1976: ½ð±Ò+10, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸, ллÄú£¡ 2012-07-12 08:35:21
ÒѾ­¼ìË÷ÁË£¬¼ìË÷ºÅUT  WOS:000303773600021
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FN Thomson Reuters Web of Knowledge
VR 1.0
PT  J
AU  Zhuang, YB
Liu, XY
Gu, Y
AF  Zhuang, Yongbing
Liu, Xiangyang
Gu, Yi
TI  Molecular packing and properties of poly(benzoxazole-benzimidazole-imide) copolymers
SO  POLYMER CHEMISTRY
LA  English
DT  Article
ID  TRANSFORM INFRARED-SPECTROSCOPY; AB-INITIO CALCULATIONS; AROMATIC POLYIMIDES; ETHER BENZIMIDAZOLE); POLYBENZIMIDAZOLE; ADHESION; BLENDS; FILMS; POLYMERS; COPPER
AB  Novel random poly(benzoxazole-benzimidazole-imide) copolymers were synthesized via the poly(amic acid)s from the reaction of 5-amino-2-(4-aminobenzene)benzoxazole (BOA) and 5-amino-2-(4-aminobenzene) benzimidazole (BIA) with 3,3',4,4'-biphenyl tetracarboxylic dianhydride (BPDA). The corresponding homopolyimides were also prepared for comparison. The resulting polyimides were characterized by different techniques to obtain their molecular packing and properties. The copolyimide films not only showed ordered arrangement of molecular chains, high packing coefficients and low water absorption, they also exhibited extremely high tensile strength (233.64-325.79 MPa) and modulus (5.18-5.75 GPa) without any stretching. The glass transition temperatures (T(g)s) and 5% weight-loss temperatures in nitrogen of the copolyimides were in the range of 339-387 degrees C and 573-577 degrees C, respectively. The excellent mechanical and thermal properties of these copolyimides have been verified to be mainly attributed to the improving regularity of the interchain packing by the introduction of benzoxazole moieties as well as the enhancement of the hydrogen bonding by the incorporation of benzimidazole moieties. In addition, the copolyimide films also showed excellent adhesion to copper (637.0-960.4 N m(-1)) without any adhesion promoters. Meanwhile, the deviation of the experimental values of the molecular packing and properties from the expected values indicated the cooperative effects of BOA and BIA moieties on the copolyimide backbone at the molecular level.
C1  [Zhuang, Yongbing; Liu, Xiangyang; Gu, Yi] Sichuan Univ, Coll Polymer Sci & Engn, State Key Lab Polymer Mat Engn, Chengdu 610065, Sichuan, Peoples R China.
RP  Gu, Y (reprint author), Sichuan Univ, Coll Polymer Sci & Engn, State Key Lab Polymer Mat Engn, Chengdu 610065, Sichuan, Peoples R China
EM  guyi@scu.edu.cn
FU  National Natural Science Foundation of China[50433010, 50973073]
FX  The work was supported by the National Natural Science Foundation of China (Grant No. 50433010, 50973073).
NR  41
TC  0
Z9  0
PU  ROYAL SOC CHEMISTRY
PI  CAMBRIDGE
PA  THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
SN  1759-9954
J9  POLYM CHEM-UK
JI  Polym. Chem.
PY  2012
VL  3
IS  6
BP  1517
EP  1525
DI  10.1039/c2py20074k
PG  9
WC  Polymer Science
SC  Polymer Science
GA  938ZW
UT  WOS:000303773600021
ER  

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