Quantitative analysis for reaction between epoxidized natural rubber and poly (L-lactide) through ¹H-NMR spectroscopy

Takayuki Saito

Department of Materials Science and Technology, Faculty of Engineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan

Chemicals Evaluation and Research Institute, Japan, 1600, Shimo-Takano, Sugito-Machi, Kitakatusika-Gun, Saitama 345-0043, Japan

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Warunee Klinklai,

Warunee Klinklai

Department of Materials and Metallurgical Engineering, Faculty of Engineering, Rajamangala University of Technology Thanyaburi, Thanyaburi, Pathumthani 12110, Thailand

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Yoshimasa Yamamoto,

Yoshimasa Yamamoto

Department of Materials Science and Technology, Faculty of Engineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan

Center for Green-Tech Development in Asia, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan

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Seiichi Kawahara,

Corresponding Author

Seiichi Kawahara

[email protected]

Department of Materials Science and Technology, Faculty of Engineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan

Center for Green-Tech Development in Asia, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan

Department of Materials Science and Technology, Faculty of Engineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan===Search for more papers by this author

Yoshinobu Isono,

Yoshinobu Isono

Department of Materials Science and Technology, Faculty of Engineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan

Center for Green-Tech Development in Asia, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan

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Yoshito Ohtake,

Yoshito Ohtake

Chemicals Evaluation and Research Institute, Japan, 1600, Shimo-Takano, Sugito-Machi, Kitakatusika-Gun, Saitama 345-0043, Japan

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Takayuki Saito,

Takayuki Saito

Department of Materials Science and Technology, Faculty of Engineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan

Chemicals Evaluation and Research Institute, Japan, 1600, Shimo-Takano, Sugito-Machi, Kitakatusika-Gun, Saitama 345-0043, Japan

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Warunee Klinklai,

Warunee Klinklai

Department of Materials and Metallurgical Engineering, Faculty of Engineering, Rajamangala University of Technology Thanyaburi, Thanyaburi, Pathumthani 12110, Thailand

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Yoshimasa Yamamoto,

Yoshimasa Yamamoto

Department of Materials Science and Technology, Faculty of Engineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan

Center for Green-Tech Development in Asia, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan

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Seiichi Kawahara,

Corresponding Author

Seiichi Kawahara

[email protected]

Department of Materials Science and Technology, Faculty of Engineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan

Center for Green-Tech Development in Asia, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan

Department of Materials Science and Technology, Faculty of Engineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan===Search for more papers by this author

Yoshinobu Isono,

Yoshinobu Isono

Department of Materials Science and Technology, Faculty of Engineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan

Center for Green-Tech Development in Asia, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan

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Yoshito Ohtake,

Yoshito Ohtake

Chemicals Evaluation and Research Institute, Japan, 1600, Shimo-Takano, Sugito-Machi, Kitakatusika-Gun, Saitama 345-0043, Japan

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First published: 04 November 2009

https://doi.org/10.1002/app.30846

Citations: 11

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Abstract

Reaction between epoxidized natural rubber and poly(L-lactide) (PLLA) was investigated quantitatively in terms of conversion of the epoxidized natural rubber. The epoxidized natural rubber was prepared by epoxidation of high ammonia natural rubber (HA-NR) or deproteinized natural rubber (DPNR) with peracetic acid followed by depolymerization with ammonium persulfate. The resulting liquid HA-NR having epoxy group (LENR) or liquid DPNR having epoxy group (LEDPNR) were subjected to heating at 473 K for 20 min, after blending with PLLA. The products were characterized through morphology observation, DSC measurement, and ¹H-NMR spectroscopy. The conversions of the rubbers were estimated from intensity ratio of signals in ¹H-NMR spectrum for the products after removing unreacted rubber with toluene. Difference in the estimated conversion between the LENR/PLLA and LEDPNR/PLLA blends was interpreted in relation to proteins present in the rubber. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010

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Volume115, Issue6

15 March 2010

Pages 3598-3604

Quantitative analysis for reaction between epoxidized natural rubber and poly (L-lactide) through ¹H-NMR spectroscopy

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Quantitative analysis for reaction between epoxidized natural rubber and poly (L-lactide) through 1H-NMR spectroscopy

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Quantitative analysis for reaction between epoxidized natural rubber and poly (L-lactide) through ¹H-NMR spectroscopy