The effect of CaCO₃ on the mechanical properties of polyethylene terephthalate/polypropylene (PET/PP) blends with styrene-ethylene/butylene-styrene (SEBS) as a compatibilizer was investigated. Samples with different compositions of PET/PP/CaCO₃ blend were prepared by injection molding method with CaCO₃ content of 0, 2, 4, 6, 8 and 10 wt%. The ratio of PET/PP was fixed at 90/10, while compatibilizer SEBS had a fixed ratio of 5%. The samples were formed according to the ASTM D638, ASTM D790, and ISO 868 standards. The results show that adding 2% of CaCO₃ helps to improve the mechanical properties of the plastic sample. Specifically, tensile strength and the flexural strength increase as CaCO₃ increases from 0 to 2%. With 2% of CaCO₃, the tensile strength and the flexural strength gain the highest value of 34.79 MPa, and 60.59 MPa, respectively. However, if the sample content is more than 4% CaCO₃, both the tensile strength and the flexural strength will experience a decline as the percentage of CaCO₃ rises. The SEM microstructure indicates that CaCO₃ particles are well dispersed on the PET substrate. Additionally, the number of particles increases when enhancing the CaCO₃ content in the blends.

研究了CaCO ₃对聚对苯二甲酸乙二醇酯/聚丙烯（PET / PP）与苯乙烯-乙烯/丁烯-苯乙烯（SEBS）增容剂共混物的机械性能的影响。通过注射成型法制备具有不同的PET / PP / CaCO ₃混合物组成的样品，其中CaCO _3的含量为0、2、4、6、8和10 wt％。PET / PP的比例固定为90/10，而增容剂SEBS的比例固定为5％。样品是根据ASTM D638，ASTM D790和ISO 868标准形成的。结果表明，添加2％的CaCO ₃有助于改善塑料样品的机械性能。具体而言，拉伸强度和弯曲强度随着CaCO _3的增加而增加。从0增加到2％。在CaCO _3为2％的情况下，抗拉强度和抗弯强度分别达到最高值34.79 MPa和60.59 MPa。但是，如果样品含量大于4％CaCO ₃，则随着CaCO ₃百分比的增加，抗张强度和弯曲强度都会下降。SEM显微结构表明CaCO ₃颗粒良好地分散在PET基材上。另外，当增加共混物中的CaCO ₃含量时，颗粒的数量增加。