CHARACTERISTICS OF LLDPE/ZRO2 NANOCOMPOSITE SYNTHESIZED BY IN-SITU POLYMERIZATION USING A ZIRCONOCENE/MAO CATALYST

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JONGSOMJIT B.; PANPRANOT J.; PRASERTHDAM P.; OKADA M.; SHIONO T.

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Journal: Iranian Polymer Journal Year:2006 | Volume:15 | Issue:5 (71) Page(s): 433-439

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Title

CHARACTERISTICS OF LLDPE/ZRO2 NANOCOMPOSITE SYNTHESIZED BY IN-SITU POLYMERIZATION USING A ZIRCONOCENE/MAO CATALYST

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Keywords

POLYOLEFINS

METALLOCENE CATALYSTS

NANOCOMPOSITES

NMR

TEM

Abstract

In the present study, the linear low-density polyethylene (LLDPE)/ZrO2 NANOCOMPOSITES were synthesized via in-situ polymerization with rac-Et(Ind)2ZrCl2/MAO catalyst. First, the nano-ZrO2 filler was impregnated with the desired amount of MAO. Then, copolymerization of ethylene/1-octene was performed in the presence of nano- ZrO2/MAO filler to produce the LLDPE/ZrO2 NANOCOMPOSITES. The amounts of nano- ZrO2 filler employed were varied at 0.1 and 0.3 g corresponding to [Al]MAO/[Zr] ratios=1135 and 3405, respectively. It can be observed that the polymer yield increased with increasing the ratios of [Al] MAO/[Zr]. However, the observed polymer yields were much lower (about 5-30 times) compared to the yield with no filler addition. The filler contents in polymer were in the range of 23-25 wt%. The characteristics of LLDPE/ZrO2 NANOCOMPOSITES obtained were determined by means of DSC, SEM/EDX, TEM, 13C NMR, and XPS. It was observed that the LLDPE/ZrO2 nanocmposites exhibited slightly lower melting TEMperature (Tm) and crystallization TEMperature (Tc). SEM Micrographs demonstrate the homogeneous matrix of the samples. In addition, with EDX mapping technique, it was also revealed that the nano-ZrO2 filler was well distributed over the polymer matrix. Based on the TEM result, it was also revealed that the smaller and more uniform particles can be observed after polymerization. These observations suggested that the fragmentation of nano-ZrO2 particles or segregation of the secondary particles could occur resulting in good dispersion of the particles. The distribution of comonomer was studied by 13C NMR. It was shown to be random as seen in the similar catalytic system without filler addition. The binding energy (BE) for C 1s obtained from XPS to be 285.7 eV indicating no significant change in the polymer microstructure with the addition of nano-ZrO2 filler.

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APA: Copy

JONGSOMJIT, B., PANPRANOT, J., PRASERTHDAM, P., OKADA, M., & SHIONO, T.. (2006). CHARACTERISTICS OF LLDPE/ZRO2 NANOCOMPOSITE SYNTHESIZED BY IN-SITU POLYMERIZATION USING A ZIRCONOCENE/MAO CATALYST. IRANIAN POLYMER JOURNAL (ENGLISH), 15(5 (71)), 433-439. SID. https://sid.ir/paper/528818/en

Vancouver: Copy

JONGSOMJIT B., PANPRANOT J., PRASERTHDAM P., OKADA M., SHIONO T.. CHARACTERISTICS OF LLDPE/ZRO2 NANOCOMPOSITE SYNTHESIZED BY IN-SITU POLYMERIZATION USING A ZIRCONOCENE/MAO CATALYST. IRANIAN POLYMER JOURNAL (ENGLISH)[Internet]. 2006;15(5 (71)):433-439. Available from: https://sid.ir/paper/528818/en

IEEE: Copy

B. JONGSOMJIT, J. PANPRANOT, P. PRASERTHDAM, M. OKADA, and T. SHIONO, “CHARACTERISTICS OF LLDPE/ZRO2 NANOCOMPOSITE SYNTHESIZED BY IN-SITU POLYMERIZATION USING A ZIRCONOCENE/MAO CATALYST,” IRANIAN POLYMER JOURNAL (ENGLISH), vol. 15, no. 5 (71), pp. 433–439, 2006, [Online]. Available: https://sid.ir/paper/528818/en

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