摘要
采用熔融接枝法制备了低密度聚乙烯(LDPE)与马来酸酐(MAH)接枝物,通过调整反应物的用量及反应条件控制接枝率。随着MAH及引发剂用量的增加,接枝率呈先增大后降低的趋势。低剪切速率时,接枝物的最大初始剪切黏度达4750 Pa·s,远高于纯LDPE;高剪切速率时,接枝物的剪切黏度与纯LDPE趋于相同,约500 Pa·s。接枝物的拉伸强度在8 MPa左右,同纯LDPE接近,断裂伸长率略有下降。
Maleic anhydride grafted low density polyethylene （LDPE-g-MAH） was prepared by melt grafting process. The graft ratio was controlled via adjustment of reactant dosage and reaction conditions. As the dosages of MAH and initiator increased, the graft ratio varied in a trend of initially rising and whereafter lowering. The maximum initial shear viscosity of LDPE-g-MAH reached 4 750 Pa.s at low shear rate, much higher than that of pure LDPE. However, both LDPE-g-MAH and the pure LDPE had almost same shear viscosity at high shear rate, a value about 500 Pa.s. LDPE-g-MAH possessed a tensile strength of 8 MPa, similar with that of pure LDPE, and a relatively low elongation at break.
出处
《合成树脂及塑料》
EI
CAS
北大核心
2007年第2期10-12,共3页
China Synthetic Resin and Plastics
基金
天津市自然基金资助项目(043612811)
关键词
低密度聚乙烯
马来酸酐
熔融接枝
接枝率
拉伸性能
流变性能
low density polyethylene
maleic anhydride
melt grafting
graft ratio
tensile property
rheological behaviour
