China Plastics ›› 2018, Vol. 32 ›› Issue (12): 86-90,125.DOI: 10.19491/j.issn.1001-9278.2018.12.014

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Study on Rheological Behaviors of PE-LD Resins Used for Greenhouse

  

  • Received:2018-06-07 Revised:2018-07-16 Online:2018-12-26 Published:2019-01-25

Abstract: The shear and extensional rheological properties of several types of PE-LD resins specially used for greenhouse were investigated intensively by using torque rheometer, capillary rheometer, melt extension rheometer and rotating rheometer. The results indicated that 2100-type and 1810D-type resins had a higher branching degree, lower processing load, higher shear sensitivity and better processability then the others. As for the 2100-type resin, its higher melt strength and more obvious strain hardening effect favored the stability of film bubble. The dynamic rheological experimental results showed that the molecular chain with long relaxation time gave melt strength and strain hardening, and the wide distribution relaxation spectrum provided good processing performance. Summarily, the 2100-type and 1810D-type resins exhibited optimum comprehensive performance among the selected resins.