BCPPO共聚酰胺66的流变性能研究

STUDY ON RHEOLOGICAL BEHAVIOR OF CO-POLYAMIDE 66 CONTAINING BIS(4-CARBOXYPHENYL)PHENYL PHOSPHINE OXIDE

以自制双(4-羧苯基)苯基氧化膦(BCPPO)为共聚单体,通过原位共缩聚反应制得了BCPPO共聚酰胺66(FR-PA66)。应用毛细管流变仪测试了FR-PA66的流变特性。结果表明,FR-PA66的非牛顿指数为0.78～0.86,熔融时呈现剪切变稀行为,属假塑性流体。在固定剪切速率下,FR-PA66的剪切应力、表观粘度随BCPPO含量的增加呈现先增大后减小趋势,当BCPPO质量分数为3%时,FR-PA66的剪切应力、表观粘度达到最大。同时,FR-PA66的表观粘度对温度较为敏感,属温敏材料。

Co-polyamide 66 （ FR - PA66） containing bis （4-carboxyphenyl） phenyl phosphine oxide （BCPPO） was prepared successfully by copolycondensation reaction. The rheological behavior was investigated employing common capillary rheometry. Experi- mental results indicated that co-polyamide 66 melts were pseudoplastic and exhibited shear-thinning behavior with non-Newton exponent changing from 0.78 to 0.86. Both shear stress（ τw ） and apparent viscosity（ηa） of co-polyamide 66 showed an increase initially and a declining trend with the weight fractions increase of BCPPO at fixed shear rate （γw）. When the （ C of BCPPO was 3wt%, both γw and ηa showed their maximum values. In additionally, the apparent viscosity of co-ployamide 66 was sensitive to temperature. Co-ployamide 66 was typical temperature sensitive material.