综述了国内高熔体强度聚丙烯(HMSPP)的生产技术。射线辐照法所制HMSPP可在常温条件下进行,纯度较高,但无法精确控制HMSPP的结构,生产成本较高;直接聚合法可通过改变外给电子体种类及加入量、聚合工艺条件等得到具有支化结构的HMSPP,其具有良好的拉伸性能和耐热性能,但催化剂及聚合工艺条件的研发周期长;化学交联改性法可减少凝胶含量,降低单体用量,但反应温度较高时,聚丙烯易发生降解;共混改性法制备的共混物中各树脂间的协同效应和化学反应性好,但会影响HMSPP的力学性能;反应挤出法工艺稳定,操作简单,适合工业化连续化生产,但各树脂在掺混时会降低HMSPP的力学性能,且各相间的相容性差。%The domestic production technologies of the high melt strength polypropylene(HMSPP)were summarized. The ray irradiation method can be performed at room temperature and the purity of the resultant HMSPP is higher,but the structure of HMSPP can not be precisely controlled and the production cost is higher. The HMSPP with branched structure is prepared through modifying the types and addition of the external electron donor and polymerization conditions by means of direct polymerization method. The resultant HMSPP has good tensile property and heat resistance,but the research and development cycle for catalyst and polymerization conditions is long. The gel content and monomer dosage can be reduced by using chemical crosslinking modification method,but the polypropylene obtained is easy to degrade when the reaction temperature is higher. The synergistic effect of different resins and chemical reactivity in the blending system are excellent by employing blending modification method,but the mechanical properties of the resultant HMSPP are affected. Reactive extrusion method is stable and easy to operate,and it is suitable for industrialized continuous production,but the mechanical properties of the HMSPP will be reduced and each phase of the resins has poor compatibility when mixing.
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