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Synthesis of Ethylene-Propylene Copolymer and their Structures

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Abstract:

This work reports copolymerization of ethylene-propylene (EP) using a novel phenoxy–ester ligated titanium catalyst. Copolymerization reactions were conducted in toluene at 70 °C with varied E/P flow ratios. Fourier transform infrared spectroscopy, X-ray diffractometer, nuclear magnetic resonance spectroscopy and differential scanning calorimetry analysis were performed to characterize the structures, compositions and glass transition temperatures of the copolymers. The results show that ethylene-propylene copolymers are random polymers and the link ratios of ethylene to propylene are between 0.89 and 1.26. The glass transition temperature of ethylene-propylene copolymer is-43.3 °C.

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Proceedings of 2014 International Conference on Material Science and Engineering View Preview

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Periodical:

Advanced Materials Research (Volume 1035)

Pages:

149-154

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1035.149

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Online since:

October 2014

Authors:

Yan Liu Dang, Yun Zhao*, Chao Xiang Wang, Qing Ze Jiao, Han Sheng Li, Qin Wu

Keywords:

Ethylene-Propylene Copolymer, Structure

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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References

[3] 53.

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[1] 00.

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[1] 26 EP4.

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[3] 47.

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[1] 00.

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[1] 10 EP5.

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89 Fig. 4. 1H-NMR spectrum of EP5 in C6D4Cl2 Differential Scanning Calorimetry Analysis of Polymers The DSC curve of EP5 is given in Fig. 5. The glass transition temperature of copolymer EP5 is -43. 3 °C based on the DSC curve. Fig. 5. DSC curve of EP5 Conclusions.

DOI: 10.31857/s0869-56524842177-180-9026

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[1] Ethylene propylene copolymers were obtained successfully using phenoxy–ester ligated titanium catalyst based on the analysis of FTIR compared with ethylene homopolymer and propylene homopolymer.

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[2] The XRD patterns show EP obtained with different flow ratios of ethylene/propylene are all random copolymers.

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[3] 13C-NMR affords sequence distribution of carbon, which also proves the copolymers are random.

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[4] The link ratios of ethylene to propylene in random ethylene-propylene copolymer prepared using different flow ratios of ethylene/propylene are 0. 89, 1. 10 and 1. 26 respectively.

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[5] The glass transition temperature of ethylene-propylene copolymer is -43. 3 °C. References.

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