Research on rapid detection of biodegradable polyester by infrared spectroscopy

doi:10.19491/j.issn.1001-9278.2024.09.016

Abstract

Abstract:

The infrared spectra of common biodegradable plastics were first collected using attenuated total reflection infrared spectroscopy， and their characteristic functional groups were labeled. A blend of biodegradable plastic and non⁃degradable plastic was prepared through melt blending and solution blending. The results indicated that a rapid detection method based on infrared spectroscopy was efficient and accurate in the analysis of biodegradable plastics. This study provides useful references for promoting the development of biodegradable plastics and the treatment of plastic pollution.

Key words: biodegradable plastics, infrared spectroscopy, attenuated total reflection, rapid detection, blending

CLC Number:

TQ323.4

YIN Maofeng, WANG Xiaoke, SUN Guohua, ZHANG Xin, LI Pengpeng, MA Jinsong, XIAO Jun, HOU Lianlong. Research on rapid detection of biodegradable polyester by infrared spectroscopy[J]. China Plastics, 2024, 38(9): 94-100.

Figures/Tables 17

样品编号	PLA质量/g	PBAT质量/g	PBS质量/g
A1	20	80	0
A2	20	60	20
A3	20	40	40
A4	20	20	60
A5	20	0	80
A6	0	20	80
A7	20	20	60
A8	40	20	40
A9	60	20	20
A10	80	20	0
A11	80	0	20
A12	60	20	20
A13	40	40	20
A14	20	60	20
A15	0	80	20

Tab.1. Melt blends of PLA/PBAT/PBS in different proportions

Fig.1. Infrared spectra of PLA， PBAT and PBS

Fig.2. Infrared spectra of PLA/PBAT solution blends with 5 %~45 % PLA content

Fig.3. Infrared spectra of PLA/PBAT solution blends with 55 %~95 % PLA content

Fig.4. Infrared spectra of PLA/PBS solution blends

Fig.5. Infrared spectra of PLA/PBS/St solution blends

Fig.6. Infrared spectra of PLA/PBS/PE⁃HD solution blends

Fig.7. IR spectra of PLA/PBAT melt blends with 5 %~45 % PLA content

Fig.8. IR spectra of PLA/PBAT melt blends with 55 %~95 % PLA content

Fig.9. Infrared spectra of PLA/PBS melt blends

Fig.10. Infrared spectra of PLA/PBS/St melt blends

Fig.11. Infrared spectra of PLA/PBS/PE⁃HD melt blends

Fig.12. Three⁃component infrared spectra with fixed PBAT content

Fig.13. Three⁃component infrared spectra with fixed PBS content

Fig.14. Three⁃component infrared spectra of PLA content fixation

Fig.15. Infrared spectra of samples with different preparation schemes

Fig.16. Infrared spectra of actual samples

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