聚琥珀酰亚胺的热力学性质研究

Study on Some Thermodynamic Properties of Polysuccinimide

用XRY-1C氧弹式量热计测定了298.15 K下聚琥珀酰亚胺的标准摩尔燃烧焓,其值为-16 428.3 J/g,实验值同基于氧燃烧理论的计算值-16 193.8 J/g非常接近.为了测定实验仪器的可信度,将萘作为标准物进行检测验证,结果显示萘的标准摩尔燃烧焓的实验测定值与文献值之间的绝对误差为68.8 J/g,相对误差为0.17%.用DSC-60差示扫描量热仪测定了聚琥珀酰亚胺在308~363 K范围内的比定压热容,确定了比定压热容与温度之间的关联式,为聚琥珀酰亚胺的工业化生产、工艺开发及工程应用提供了热力学依据.

The standard mole combustion enthalpy of polysuccinimide was determined to be- 16 428. 3 J / g by XRY-1C oxygen-bomb calorimeter. The experimental result showed the value was very similar to the calculation result of- 16 193. 8 J / g based on the oxygen consuming theory. The reliability of instrument was tested by naphthalene as reference material,and the absolute error and relative error were 68. 8 J / g and 0. 17%,respectively,by comparing the measured value with literature value about the standard combustion enthalpy of naphthalene. The specific heat capacity of polysuccinimide was measured within temperatures of 308 ~ 363 K by DSC-60 differential scanning calorimeter,and the specific heat capacity was expressed as a function of temperature. The basic data of thermodynamics were helpful for exploiting new synthetic method,engineering design and commercial process of polysuccinimide.