摘要
通过多单体熔融接枝的方法制备出了具有较高接枝率的ABS接枝物 (ABS g (MAH co St) ) ,并对其接枝机理进行了初步探讨 .研究表明 ,MAH、St接枝ABS时 ,反应主要发生在ABS中聚丁二烯的双键部位 .同时 ,当MAH与St的用量比约为 1:1时接枝率达到最高 .ABS g (MAH co St)作为尼龙 6 (PA6 ) ABS共混体系相容剂起到了良好的增容效果 .实验证明 ,相容剂使用前后 ,共混物的相区尺寸由几十 μm减小到 1μm以下 ,且分布更加均匀 ;共混物的拉伸强度和冲击强度等力学性能也同时得到均衡改善 .
Free-radical melt grafting of the multi-monomre system of maleic anhydride(MAH)/styrene( SO onto ABS resin was studied using a Hakke rheometer. The maximum MAH graft degree was obtained when the molar ratio of MAH to St was approximately 1 : 1. The addition of St, an assisting monomer, improved the grafting reactivity of MAH,and St also reacted with MAH to form the St-MAH copolymer(SMA) before the two monomers grafted onto BAS. The site of grafting is mainly at the double bonds of ABS. ABS-g-(MAH-co-St) was used as a precursor on in-situ compatibilizer for incompatible blend of PA6 and ABS. The changes in morphologies of PA6/ABS/ABS-g(MAH-co-St) blends with different contents of ABS-g-(MAH-co-St) were investigated using SEM. The addition of ABS-g-(MAH-co-St) markedly improved the morphologies of the blends,and an uniform and fine dispersed phase was obseved with size being about 0.1 mu m for a PA6/ABS-g-(MAH-co-St)(70/30) blend. The addition of ABS-g(MAH-co-St) also greatly improved the mechanical properties of PA6/ABS blends. The Izod impact strength of the blends greatly increased with increasing the content of ABS-g-(MAH-co-St) in the blends,and the tensile strength of the blends also increased. The PA6/ABS blends with balanced mechanical properties could be obtained by addition of ABS-g-(MAH-co-St).
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2005年第2期213-218,共6页
Acta Polymerica Sinica
基金
国家自然科学基金 (基金号 2 0 1740 2 2 )
重点基金 (基金号 10 3 3 40 2 0 )资助项目
