将由乙烯-丙烯酸酯-马来酸酐共聚物（CB）与共聚尼擅（PA-54）在双螺杆挤出机中反应共混制得的改性共聚尼龙MCOPa与高密度聚乙烯（HDPE）通过层状共混工艺制备高阻隔性中空吹塑瓶。研究表明，吹塑工艺对阻隔瓶的阻隔性能具有很大的影响。

以聚丙烯（PP）为基材，加入一定量的低密度聚乙烯（LDPE）和增塑剂邻苯二甲酸二辛酯（DOP）通过与二元乙丙橡胶（EPR）熔融共混制备了易开启式输液瓶外盖用料。根据外盖用料的物理力学性能、外观及加工流动性等方面的要求，确定共混工艺参数。研究发现，当在共混体系PP/EPR/LDPE（共混比为30/50/20）中加入质量分数3%的DOP后，共混体系的拉伸屈服强度降至4.08MPa，基本达到易开启式输液瓶外盖料的性能要求。此共混工艺具有生产工艺简单、设备占用少、容易实现产业化等优点。

PP was taking as basic material, and blended with ethy lene propylene rubber (EPR) by mens of melt blending to prepare easy openable infusion bottle cover materials, in which a certain amount of LDPE and plas ticizer was added to improver the compatibility and mechanical properties of the blend, The effects of plasticizers DOP, ATBC and Glycerol on the mechanical properties of the blend were studied. It was found when a certaim amourt of plasticizer was added to the PP/ EPR=40/60 blend, the tensile yield strength and torque of the blend decreased When a certain amount of LDPE was added into PP/ EPR blend, the addition of a certain amount of DOP and Glycerol (mass fraction<3%) could decrease the tensile yield strength of the blend, in this formulation, the tensile yield strength of the blend had a trend of decline after rising by the addit ion of ATBC

EPR and the use of nbberlike polyner melt blending pp is a commonly used means of modification, In blends, PP and EPR scattcred into a"sca-island" structure, The toughcning mechanism is the "sliver-striped-shear zone yield" theory. The EPR and PP both contain n-propyl,according to the Similar Comatibility Principles, they should have a better compatibility, in actual blending, the decentralization of EPR blends also depends on the processing conditions, Blending in the same conditions, if the PP and EPR have the similar of melt-viscosity, the structure of blend systems will be more evenly, By adding plasticizers DOP in PP EPR blend system, DOP can scattered in the two-phase interfacc, the interface energy can reduce, thus reducing the strcngth of the blends. Adding a third group PE. by controlling the content of PP EPR and PE EPR will play as the compatibity agent of PP and PE. and the system can fotned a special" coire-shell" structure.

由乙烯-丙烯酸酯-马来酸酐共聚物（CP）与共聚尼龙（C（）PA）在双螺杆挤出机中进行反应共混制备改性共聚尼龙（Mc（）PA）。采用Mc（）PA/高密度聚乙烯（HDPE）材料制备高阻隔性中空吹塑瓶。对制品的加工工艺、阻隔性能、形态结构等进行了研究。结果表明。加工工艺对制品阻隔性能会有很大的影响。同时形态分析表明，吹塑瓶瓶口、瓶身、瓶底各个部位的横断面和纵断面都具有清晰、连续的层状结构。