M-POE-g-MAH增韧PBT的力学性能和形貌

Study on Mechanical Properties and Morphology of Poly(Butylene Terephthalate) Toughened by M-POE-g-MAH

研究了一种新型增韧剂 (M POE g MAH )对PBT树脂的增韧效果。与传统的纯POE g MAH增韧剂(POE g MAH)进行对比 ,考察了增韧剂的组成、用量对共混物力学性能的不同影响 ,并结合共混物的室温缺口冲击断面SEM照片 ,分析了共混物发生脆韧转变所对应的微观形貌特征。实验结果表明 ,在M POE g MAH/PBT共混体系中 ,POE g MAH用量占体系 10 %左右时共混物发生明显的脆韧转变 ,而在传统的纯POE g MAH/PBT共混体系中 ,POE g MAH用量为 15 %左右才使共混物发生脆韧转变。M POE g MAH增韧PBT在性能和成本上具有较大的优势 ,所得共混物产品的性价比较高。

Toughening effect of poly(butylenes terephthalate) with a novel toughener(modified maleic anhydride grafted polyethylene-octene elastomer,M-POE-g-MAH) was studied. Compared with pure POE-g-MAH, influence of impact modifier's ingredients and contents on mechanical properties of the blends was investigated. Using scanning electronic microscopy photographs of impact fracture surfaces, morphologies responsible for brittle-ductile transition were also analyzed. The results indicated that a brittle-ductile transition occurred when POE-g-MAH content was up to 10 % in M-POE-g-MAH/PBT blends, whereas brittle-tough transition occurred when POE-g-MAH content was up to 15 % in POE-g-MAH/PBT blends. PBT toughened by M-POE-g-MAH impact modifier has more advantages in properties and cost, and its blend has a higher ratio of property to cost in contrast with pure POE-g-MAH impact modifier.