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研究了两种抗冲改性剂增韧聚乳酸(PLA)体系的力学性能。结果表明:两种抗冲改性剂均能提高PLA的冲击强度和断裂伸长率。抗冲改性剂2在用量为5%时,使PLA体系的冲击强度提高到11.8 kJ/m2,比添加前提高了140.8%;当两种抗冲改性剂的用量为10%时,PLA体系的冲击强度均从4.9 kJ/m2提高到约16.0 kJ/m2,提高了226.5%。两种抗冲改性剂用量为5%时,PLA体系的断裂伸长率从9%分别提高到33%和20%;抗冲改性剂1用量为10%时,体系的断裂伸长率提高到173%。
The mechanical properties of two toughening modifiers toughening polylactic acid (PLA) system were studied. The results show that both impact modifiers can improve the impact strength and elongation at break of PLA. Impact modifier 2 increased the impact strength of PLA system to 11.8 kJ / m2 at the dosage of 5%, which was 140.8% higher than that before addition. When the dosage of two impact modifiers was 10%, PLA The impact strength of the system increased from 4.9 kJ / m2 to about 16.0 kJ / m2, an increase of 226.5%. The elongation at break of PLA system increased from 9% to 33% and 20% respectively when the dosage of the two kinds of impact modifiers was 5%. The elongation at break of the system Increase to 173%.