SYNTHESIS, CHARACTERIZATION AND THERMAL-DEGRADATION STUDIES OF POLY(ETHER ETHER KETONE) COPOLYMERS

被引:17
作者
RAO, MR [1 ]
RAO, VL [1 ]
RADHAKRISHNAN, TS [1 ]
RAMACHANDRAN, S [1 ]
机构
[1] VIKRAM SARABHAI SPACE CTR,DIV POLYMERS & SPECIAL CHEM,TRIVANDRUM 695022,KERALA,INDIA
关键词
POLY(ETHER ETHER KETONE) COPOLYMER; IR SPECTROSCOPY; C-13 NMR SPECTROSCOPY; THERMOGRAVIMETRY; X-RAY DIFFRACTION; PYROLYSIS-GAS CHROMATOGRAPHY;
D O I
10.1016/0032-3861(92)90461-5
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Poly(ether ether ketone) copolymers (I-V) were prepared by the nucleophilic reaction of 4,4'-difluorobenzophenone with varying mole proportions of hydroquinone and resorcinol using sulpholane as solvent and in the presence of K2CO3. The polymers were characterized by different physico-chemical techniques. The glass transition temperature and crystallinity of the polymers was found to decrease with increase in concentration of the resorcinol units in the polymers. Thermogravimetric studies showed that all the polymers were stable up to 400-degrees-C with a char yield above 50% at 900-degrees-C in nitrogen atmosphere. The isomeric polymers (I and V) showed distinct differences in their thermal degradation behaviour and the pyrolysis-g.c. data indicated the random nature of the copolymers (II-IV). The amount of resorcinol evolved during pyrolysis at 800-degrees-C was correlated with the sequence distribution of the comonomers in the polymer.
引用
收藏
页码:2834 / 2839
页数:6
相关论文
共 8 条
[1]  
BOWEN ST, 1986, 41ST AN C REINF PLAS
[2]  
CHRISTENSEN S, 1986, INT SAMPE S EXHIB, V31, P1747
[3]   SYNTHESIS OF AROMATIC POLYETHERKETONES IN TRIFLUOROMETHANESULPHONIC ACID [J].
COLQUHOUN, HM ;
LEWIS, DF .
POLYMER, 1988, 29 (10) :1902-1908
[5]   THERMAL-DECOMPOSITION OF POLY(ARYL ETHER KETONES) [J].
HAY, JN ;
KEMMISH, DJ .
POLYMER, 1987, 28 (12) :2047-2051
[6]   SYNTHESIS AND CHARACTERIZATION OF NARROW MOLECULAR-WEIGHT DISTRIBUTION FRACTIONS OF POLY(ARYL ETHER ETHER KETONE) [J].
ROOVERS, J ;
COONEY, JD ;
TOPOROWSKI, PM .
MACROMOLECULES, 1990, 23 (06) :1611-1618
[7]  
STANILAND PA, 1980, Patent No. 10868
[8]  
Wood A. S., 1987, MOD PLAST INT JUN, P88