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2015-09-09 22:01:36   Source:    Views:

Polyester alloys compatibilizer, thermal oxygen stabilizer

Product Introduction

Fine-Blend® SAG-002 can improve thermal stability and phase state of PC/ABS, and improve compatibility and mechanical properties of ABS/PBT, ABS/PET alloys, PBT/ASA/GF etc. And it makes the bulk ABS and its alloy system has excellent anti-yellowing properties as a thermal-oxygen stabilizer.

Mechanism and Advantage

SAG-002 is a reactive compatibilizer with middle epoxy content and higher reaction activity. By reactive compatibility, SAG-002 optimizes the dispersed phase morphology and the refine phase domain role by reducing the interfacial tension of polyester alloy materials and the dispersed phase domain, significantly improving the toughness of the material and avoiding adverse ester exchange reaction.

Fig 1. The reaction between SAG-002 and PC terminal groups

SAG-002 has excellent anti-thermal oxygen degradation properties in bulk ABS and its alloy system, and its proper epoxy group concentration can not only effectively block the thermo-oxidative degradation reaction but also prevent the material from appearing too high unnecessary risks and costs to increase.

Application Case

Case1 Application of Fine-Blend® SAG-002 in bulk ABS

Fig 2. Effects of different amounts of SAG in bulk ABS ( thermal oxidative degradation test, 200 ℃ * 6H)

Figure 3, Oxidative induction time (OIT) of different amounts of SAG in bulk ABS 

From fig. 2, it can be seen visually that the severe yellowing of ABS occurs under the conditions of thermal oxidative degradation at 200 ℃ for 6h. With the addition of SAG-002, the yellowing phenomenon is greatly reduced. Thus, SAG-002 for thermal degradation resistance to bulk ABS products due to yellowing especially effective; Additionally, fig. 3 shows that the SAG-002 greatly increases the ABS oxidation induction time.

Case2 Application of SAG-002 in PC/ABS

(1) SAG-002 improve the PC/ABS (70/30) thermal stability

Fig.4 The effect of SAG-002 in PC/bulk ABS thermal stability ( thermal oxidative degradation test, 200 ℃ * 6H)

Figure 4 shows that the yellowing of the PC / ABS with SAG-002 was significantly reduced after heat-retention test (260℃/10min), which shows that SAG-002 can significantly improve the thermal stability of PC / ABS.

(1) SAG-002 optimizes the PC / ABS (70/30) phase state and improves mechanical properties

Figure 5. Effect of SAG-002 on PC / ABS (70/30) phase state (SEM)

From Fig. 5, when SAG-002 was not added, the ABS phase in PC / ABS was locally agglomerated, resulting in uneven dispersion of the rubbery phase and severe deformation of the large rubbery particles; after adding 0.5% SAG-002, the phase distribution of ABS is more uniform, and the morphology of dispersed phase particles is regular. It can be seen that SAG-002 can promote the uniform distribution of rubber phase, maintain the dispersed phase morphology, and reduce and stabilize the rubber particle size, which will be beneficial to the improvement of mechanical properties of the alloy materials and reduce the sensitivity of the impact performance to the gap.

In Figure 6, the notched IZOD impact strength of 1/8 "and 1/4" of PC / ABS increased by about 10% and 90%, respectively, after adding 0.5% SAG-002. It is easy to understand that SAG-002 optimizes the microstructure of the alloy and makes the particle size of the dispersed phase more uniform and distributed more evenly. As a result, the alloy material can absorb more energy when exposed to external force and show an increase in impact strength, notch sensitivity decreased.

Table1  SAG-002 can improve the stability of PC/ABS notched IZOD impact strength

1/8”Izod notched impact data(J/m)

1/4”Izod notched impact data(J/m)

























In Table 1, after adding SAG-002, the value of PC / ABS impact strength data dispersion is smaller and material impact performance is more stable.

(1) SAG-002 improves the impact properties of PC / ABS (30/70) with low PC content

From Fig. 7, 1.5 parts SAG-002 was added to PC / ABS with low PC content. The Charpy notched impact strength increased by 34% at room temperature and increased by 40% at low temperature. The melt index did not decrease significantly, indicating good Improve the role of phase, thus greatly improving the impact strength.

Case 3 Application of SAG-002 in ABS/PBT

As shown in Figure 8, the 1/8 "notch impact strength of ABS / PBT (50/50) increased by 187% and 200%, respectively, with addition of 2% and 4% SAG-002; the 1/4" notch impact strength increased by 88% And 127%. It shows that SAG-002 can greatly improve the impact strength of ABS / PBT. This is partly because SAG-002 inhibits the degradation of PBT and partly because of the SAN-g-PBT structure formed by the addition of SAG-002, which improves the compatibility with ABS and improves the phase of ABS / PBT.


Case 4  Application of SAG-002 in PBT/ASA/GF 

From Fig. 9 and Fig. 10, the tensile strength and flexural strength of PBT / ASA / GF increased with the addition of 2% SAG-002 and the impact strength increased by about 40%, indicating that SAG-002 has Better compatibility, with a certain degree of enhancement and toughening effect.

Case 5. SAG-002 optimizes ABS/PET phase morphology and improves ABS/PET impact strength

Fig 11. The influence of SAG-002 on phase structure of ABS/PET(70/30)

a=ABS/PET; b=ABS/PET/2%SAG-002; c=ABS/PET/4%SAG-002

As shown in Fig 11, SAG-002 plays a role in the alloy as a compatibilizer. After adding SAG-002, the "island" of the PET particle size is smaller and more homogeneous dispersion.


Fig 12. The influence of SAG-002 on notched impact strength and melt index of ABS/PET

As shown in Fig 12, after adding 2% and 4% of the SAG-002, the impact strength of ABS/PET alloy increases by 100% and 140% respectively. It indicates that the dispersed phase refinement benefits the material toughness. This performance improvement is due to further reinforce of interfacial adhesion. While melt index decreased with the addition of SAG-002, indicates the formation of more in-situ PET-g-SAN grafting, and increases the entanglement density of molecule chain, resulting in the increase of melt viscosity in low shear conditions.

Recommended Dosage

0.5%-3%, depending on the particular substrate performance to be reached.

Processing guidelines, Package &storage, Safety information

Please refer to the product SDS.

[ TDS ] [ ROHS ]

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