再生PCTG增韧改性再生PET的性能研究

Study on properties of transparent toughened rPET/rPCTG alloys

通过再生聚对苯二甲酸乙二醇-1,4-环己烷二甲醇酯(rPCTG)的添加来对再生聚对苯二甲酸乙二醇酯(rPET)进行增韧改性,从而制备得到透明增韧rPET/rPCTG合金。研究了不同rPCTG添加量对材料力学性能、透明度以及热性能的影响。结果表明,随着rPCTG含量的增加,材料的拉伸性能、弯曲性能和透明度呈下降趋势,而冲击强度明显增加;当rPCTG含量为15%(质量分数,下同)时,材料的冲击强度由原来的54.8 J/m增加到68.0 J/m,增加了24.2%;而此含量下,材料的拉伸与弯曲性能、透明度和雾度基本未发生明显变化。

Transparent toughened recycled polyethylene terephthalate(rPET)/recycled poly(1,4-cyclohexylene dimethyl-ene terephthalate glycol)(rPCTG)alloys was prepared through melt blending.The effect of rPCTG content on the me-chanical properties,transparency and thermal properties of the alloys were investigated.The results indicated that the tensile and bending properties and transparency of the alloys decreased with an increase in the rPCTG content,whereas their impact properties increased significantly.When the rPCTG content was 15 wt%,the alloys obtained an increase in impact strength from 54.8 J/m to 68.0 J/m,increasing by 24.2%.However,there was almost no influence on their tensile and bending properties,transparency,and haze.