基于生物基聚碳酸酯的应用开发

Development for applications of bio⁃based polycarbonate

研究了在投料质量比为50/50的前提下,异山梨醇型共聚聚碳酸酯与双酚A型聚碳酸酯共混挤出后,材料的折射率差异对合金外观的影响。通过差示扫描量热法测定合金玻璃化转变温度,探究了两相间的相容性。结果表明,两相为部分相容体系。研究了抗氧剂AO300对于材料相容性及透光率的影响。结果表明,在AO300添加量为9份(质量份,下同)时,材料的透光率为82%,基本完全相容。通过力学性能、热变形温度和熔体流动速率等指标评价了增韧剂M732及增韧剂M577对于合金体系性能的影响,结果表明,M577具有更好的增韧效果。对比了不同种类相容剂对材料物性的影响,结果表明,甲基丙烯酸缩水甘油酯(GMA)类相容剂能够提升相间相容性,相容剂GMA含量越高对材料的流动性影响越大。依托相容剂及增韧剂使用,合金材料基本满足实际使用需求。

In this paper,a poly(ISB⁃co⁃CHDM carbonate)/bisphenol⁃A polycarbonate alloy was prepared at a mass ratio of 50/50,and the effect of refractive index differences of raw materials on the appearance of the alloy was investigated.The glass⁃transition temperature of the alloy was determined by DSC,and the compatibility between two phases was ex⁃plored.The results indicated that the two phases of the alloy were partially compatible.The effect of antioxidant(AO300)content on the glass⁃transition temperature and transmittance of the alloy were studied.The results indicated that when 9 phr of AO300 was added,the transmittance of the alloy reached 82%.This suggests that the alloy basically became a fully compatible system.The effects of flexibilizers(M577 and M732)on the mechanicals properties,heat de⁃formation temperature,and melting flow rate of the alloy were investigated.The results indicated that M577 generated a better toughening effect than M732.The effect of different types of compatibilizers on the material properties of the alloy was compared.The results indicated that the GMA⁃type compatibilizers enhanced the compatibility of the alloy and gen⁃erated a significant influence on its fluidity.Based on the use of compatibilizers and flexibilizers,the alloy can meet the re⁃quirement of practical use.