Study on ABS specially used for modification of PC/ABS alloys

doi:10.19491/j.issn.1001-9278.2025.10.007

Abstract

Abstract:

To enhance the compatibility of polycarbonate （PC）/acrylonitrile⁃butadiene⁃styrene （ABS） blends， a modified ABS was synthesized via emulsion grafting polymerization with glycidyl methacrylate （GMA）. This GMA⁃modified ABS was subsequently melt⁃blended with PC. The epoxy groups of GMA were found to react effectively with the terminal hydroxyl and carboxyl groups of the PC chains， serving as a compatibilizer at the polymer interface. This reaction significantly improved the miscibility between the two phases. The optimal mechanical properties were achieved with a GMA loading of 10 g， resulting in a PC/ABS alloy with notch impact strength of 55.5 kJ/m² and elongation at break of 70 %. These values represent an 18 % increase in impact strength and a 46 % improvement in ductility over the uncompatibilized control blend. This work demonstrates an effective reactive compatibilization strategy for developing high⁃performance PC/ABS alloys.

Key words: polycarbonate, acrylonitrile?butadiene?styrene copolymer, glycidyl methacrylate, functionalization of epoxy groups, mechanical property

CLC Number:

TQ325.2

LI Xinyu, LU Shulai, WANG Liwei, XU Chao, NIU Jingpeng, MA Xiaokun. Study on ABS specially used for modification of PC/ABS alloys[J]. China Plastics, 2025, 39(10): 33-38.

Figures/Tables 12

原料种类	乳液聚合初始反应加入量/g	乳液聚合增量反应加入量/g	乳液聚合熟化反应加入量/g
St	72.144	216.533	-
AN	28.084	84.152	-
水	603.4	-	11.18
M胶乳	879.37	-	-
T胶乳	229.4	-	-
葡萄糖溶液	5.247	-	2.679
硫酸亚铁溶液	20.1	-	10.9539
NaOH溶液	13.7	-	-
TDDM	1.32	1.1	-
CHP	0.875	2.174	0.88

Tab.1. ABS emulsion polymerization composition and dosage

溶液类型	焦磷酸钠含量	硫酸亚铁含量	水含量	葡萄糖含量
硫酸亚铁溶液	5	0.25	165.75	—
葡萄糖溶液	—	—	13	7

Tab.2. Composition and dosage of the proportioned solution in ABS emulsion polymerization

Fig.1. Diagram of the reaction mechanism of GMA added at different stages of emulsion polymerization

Fig.2. GMA reacts with styrene and acrylonitrile

Fig.3. FTIR of ABS， modified ABS' and GMA'

Fig.4. Effect of different amounts of GMA on solid content and pH

Fig.5. The effect of different amounts of GMA on particle size

Fig.6. Effect of different amounts of GMA on the impact strength of ABS and PC/ABS

Fig.7. Effect of different amounts of GMA on elongation at break of ABS and PC/ABS

Fig.8. Mechanism of GMA capacitation PC/ABS alloy

Fig.9. Microscopic morphology of PC/ABS alloy with different amounts of GMA

Fig.10. Cross⁃linking reaction equation between GMA and PC/ABS

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