PHASE AND CRYSTALLIZATION BEHAVIOR OF SOLUTION-BLENDED POLY(ETHER ETHER KETONE) AND POLY(ETHER IMIDE)
PHASE AND CRYSTALLIZATION BEHAVIOR OF SOLUTION-BLENDED POLY(ETHER ETHER KETONE) AND POLY(ETHER IMIDE)
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DOI：
10.1002/pen.760322410
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发表时间：
1992-12-01
影响因子：
3.2
通讯作者：
PORTER, RS
中科院分区：
文献类型：
--
作者：
CHEN, HL;PORTER, RS
报道了溶液共混聚醚醚酮(PEEK)和聚醚酰亚胺(PEI)共混物的研究结果。采用二氯乙酸作为共溶剂进行共混。证实PEEK和PEI在熔体中是相容的。玻璃化转变行为服从简单的Fox方程或Gordon-Taylor方程，可调系数kappa=0.86。这与先前关于熔融共混的PEEK/PEI共混物的数据一致。非晶态PEEK/PEI共混物的T(G)宽度比纯组分的T(G)宽。最大展宽约为10摄氏度。无定形PEEK/PEI共混物的比容与线性略有负偏差，表明PEEK与PEI之间存在良好的相互作用。用交叉偏振光学显微镜研究了270℃下共混物的球晶生长及其形态。在270℃时，可混溶熔体形成的PEEK球晶的径向生长速率从PEEK/PEI 90/10共混物的3.04微米/分下降到PEEK/PEI 70/30共混物的0.77微米/分。PEEK/PEI共混物结晶速率的降低是由于共混物T(G)的增加所致。在生长的早期阶段，由270℃的混溶熔体形成的PEEK球晶呈线性生长。球晶生长在生长后期偏离线性生长。在270℃时，由可混溶的PEEK/PEI熔体形成的PEEK球晶基本上是体积填充的。与纯PEEK熔体相比，共混物形成的PEEK球晶的球晶分枝更加清晰。
Results on solution-blended poly(ether ether ketone) (PEEK) and poly(ether imide) (PEI) blends are reported. Dichloroacetic acid was used as the cosolvent for blending. PEEK and PEI are confirmed to be miscible in the melt. The glass transition, T(g), behavior obeys the simple Fox equation or the Gordon-Taylor equation with the adjustable coefficient kappa = 0.86. This agrees with prior data on melt-blended PEEK/PEI blends. The T(g) width of the amorphous PEEK/PEI blends was found to be broader than that of the pure components. The maximum broadening is about 10-degrees-C. The specific volume of the amorphous PEEK/PEI blends shows a slight negative deviation from linearity, indicating favorable interaction between PEEK and PEI. The spherulitic growth and resultant blend morphology at 270-degrees-C were studied by a cross-polarized optical microscope. The radial growth rate of PEEK spherulites formed from the miscible melt at 270-degrees-C decreases from 3.04 mum/min for PEEK/PEI 90/10 blend to 0.77 mum/min for PEEK/PEI 70/30 blend. The decrease in crystalization rate of PEEK from PEEK/PEI blends is attributable to the increase in blend T(g). A linear growth was observed for PEEK spherulites formed from miscible melt at 270-degrees-C in the early growth stage. The spherulitic growth deviated from linearity in the late stage of growth. PEEK spherulites formed from the miscible PEEK/PEI melt at 270-degrees-C are essentially volume-filling. The branches of the spherulites become more clear for PEEK spherulites formed from the blend than that formed from pure PEEK melt.