平推流管式连续反应器合成耐热ABS树脂的研究

Polymerization of Heat-resistant ABS Resins Synthesized in a Plug Flow Tube Continuous Reactor

采用自主研发的四釜串联平推流管式反应器和本体聚合方法,通过添加N-苯基马来酰亚胺(NPMI)作为改性单体制备了耐热丙烯腈-丁二烯-苯乙烯共聚物(ABS)树脂。研究了NPMI加入方式对ABS树脂结构和性能的影响,并通过仪器化冲击实验对橡胶的增韧效果进行了验证。结果表明,加入进料量3%的NPMI使合成的ABS树脂热变形温度和拉伸强度有所提高,但冲击强度显著下降;当NPMI在第一、三反应器同时等量加入聚合系统时,相比在第一或第三反应器加入得到的样品的热变形温度提高到84.6℃,拉伸强度提高到54.3 MPa,冲击强度提高到162.3J/m。

A heat-resistant ABS resin was prepared by a self-developed, four-kettle plug flow reactor tube through bulk polymerization, and N-phenyl maleic （NPMI） was used as the modifier. It was found that the resin containing 3% NPMI had better tensile strength and higher thermal deformation temperature, and the impact strength was relatively low. In order to improve the thermal deformation temperature while keeping certain impact strength, some contrast experiments were made to research the influence of NPMI and rubber addition on the structure and properties of ABS resin. When the same amount of NPMI was added to the 1st and 3rd reactors at the same time, the tensile strength of ABS resin was 54. 3 MPa, and the impact strength was 162.3 J/m, and the thermal deformation temperature was 84. 6 ℃, which were much better than those of the product obtained when NPMI was added in the 1st or 3rd reactor separately.