Research on Modification of PETG Series Filament for FDM

doi:10.19491/j.issn.1001-9278.2020.10.005

Abstract

Abstract:

Based on the characterization results of commercial PETG filaments as raw materials， PETG 2012 was selected as the matrix resin for the preparation of PETG filament for fused deposition modeling （FDM）. The PETG resin was modified by PC to improve its toughness and strength when used for the preparation of 3D printing filament. The test specimens were printed by FDM， and the effect of PC content on the performance of PETG filament and printed parts was investigated. The results indicated that PETG and PC had good compatibility at low contents of PC， and there was no obvious phase separation observed between the two phases. The blends showed a decrease in fluidity with an increase of PC content. Moreover， the PETG-printed parts exhibited an improvement in Vicat softening temperature and heat deflection temperature with an increase of PC content. In addition， the addition of PC improved the mechanical properties of printed parts significantly. The tensile strength of printed parts increased with an increase of PC content， and however their notched impact strength increased at first and then tended to decrease with an increase of PC content. To make PETG/PC filament meet the use condition of FDM 3D printers， the ratio of PETG and PC should be set to 1∶1 when preparing the PETG/PC filament， thus leading to excellent mechanical properties for 3D printing filaments.

Key words: polyethylene terephthalate-1, 4-cyclohexanedimethanol, polycarbonate, fused deposition modeling, modi?fication

CLC Number:

TQ 323.4

QIAO Wenyu, WANG Chenglei, HU Hao. Research on Modification of PETG Series Filament for FDM[J]. China Plastics, 2020, 34(10): 24-31.

Figures/Tables 15

样品编号	组分含量/质量份
样品编号	PETG	PC	润滑剂 PETS?SP	抗氧剂 1010
1^#	70	30	3	3
2^#	50	50	3	3
3^#	30	70	3	3

Tab.1. Composition of PETG/PC blends

Fig.1. IR of commercial PETG filament and raw materials

Fig.2. The molecular formula of PETG

Fig.3. H1?NMR of the commercial PETG filament and raw materials

Fig.4. DSC of the commercial PETG filament and raw materials

Fig.5. MFR of the commercial PETG filament and raw materials

Fig.6. PETG filamen and its printed part

Fig. 7. IR of PETG, PC and PETG / PC blends

Fig. 8. MFR of PETG, PC and PETG / PC blends

Fig. 9. DSC of PETG, PC and PETG / PC blends

Fig.10. Vicat softening temperature and thermal deformation temperature diagram of PETG, PC and PETG/PC blends

Fig. 11. SEM of PETG, PC and PETG/PC blends

Fig.12. The tensile properties of PETG/PC blends

Fig.13. Impact strength of PETG / PC blends

Fig.14. The printing effect of PETG / PC blends

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