摘要
采用机械共混法制备了热塑性聚氨酯 (TPU )与聚氯乙烯 (PVC)共混物。探讨了共混比对TPU/PVC共混物性能的影响 ,优化出TPU/PVC共混比 3 0 /70 (质量比 ) ,在此基础上研究了增塑剂、热稳定剂、填料对TPU/PVC共混物力学性能、流变性能和耐油、耐溶剂性能的影响。研究结果表明 ,TPU/PVC共混物的力学性能在共混时有协同作用 ,耐油、耐溶剂性均较好 ,从成本和实用两方面出发 ,选择TPU/PVC =3 0 /70共混比更有实用性。随增塑剂DOP的增加 ,共混物的力学性能呈下降趋势。在所选热稳定剂中 ,以硬脂酸钙制得共混物的力学性能最好 ;在所选填料中 ,白炭黑的补强效果最好。扫描电镜观察共混物的微观结构显示 ,TPU /PVC共混比为 3 0 /70有较好的相容性 ,这与力学性能结果相一致。TGA分析显示 ,TPU的加入提高了共混物的热稳定性。红外光谱分析表明 ,TPU和PVC共混只是一个简单的物理共混过程。
Blends of thermoplastic polyurethane (TPU) and poly(vinyl chloride) (PVC) were prepared via mechanical blending.The effects of the weight ratio of TPU/PVC,the amount of plasticizer,thermal stabilizers and filler on properties (mechanical and rheological behavior,oil and solvent resistances) of the blends were investigated.When the weight ratio of TPU/PVC was 30/70(m/m),the blend exhibited optimal mechanical strength,solvent and oil resistances.Calcium stearate and silica were considered as the best choices for thermal stabilizer and filler,respectively.SEM micrographs showed that the TPU/PVC(30/70) exhibited the best compatibility in all ratios.Infrared analysis showed that no chemical reaction was observed between TPU and PVC,yet the thermal stability of PVC was increased with blending of TPU.
出处
《中国塑料》
CAS
CSCD
北大核心
2004年第8期48-52,共5页
China Plastics
关键词
热塑性聚氨酯
聚氯乙烯
共混
改性
力学性能
thermoplastic polyurethane
poly(vinyl chloride)
blending
modification
mechanical property
