摘要
考察了离聚体增韧聚甲醛(POM)体系及甲基丙烯酸甲酯-苯乙烯-丁二烯共聚物(MBS)增容POM/离聚体共混体系的力学性能和亚微相态。研究发现,10%离聚体与POM共混可取得一定的增韧作用;乙烯-甲基丙烯酸-锌离聚体(EMMA-Zn)比乙烯-甲基丙烯酸-钠离聚体(EMMA-Na)具有更好的增韧效果。MBS可成为POM与离聚体的增容剂,并具有协同增韧作用;亚微相态观察发现,离聚体在POM基体中呈"海-岛"结构分布;MBS可以提高离聚体的分散性及其与POM的界面粘结性,减小离聚体粒子的直径,最终提高了离聚体的增韧效果。
The mechanical properties and morphology of polyoxymethylene (POM) toughened with ionomers were investigated and the compatibilizing effect of methyl methacrylatestyrenebutadiene copolymer (MBS) on POM/ionomer blends was studied. It was found that 10% of ionomers could toughen POM. MBS plays the role as a compatibilizer and cooperative impact modifier for POM and ionomers, and the ternary blends achieve a remarkable improvement in impact strengh. The impact fracture surface demonstrated that a typical seaisland morphology for POM/ionomer binary blends. With the addition of MBS, the interface adhesion between POM and ionomers could be improved, and particle size of ionomer in POM matrix could be decreased, which impeded the growth of craze and promoted the shear deformation of POM matrix. As a result, a large amount of impact energy could be absorbed and the good toughening was thus obtained.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2003年第5期97-100,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(59586003)
