摘要
采用嵌段共聚物F68对聚甲基丙烯酸甲酯(PMMA)进行原位增韧改性,研究了改性PMMA的力学性能、光学透明性和断面形貌,并探讨了其改性机理。结果表明:F68对PMMA有较好的增韧作用,随着F68含量的增加,改性PMMA的冲击强度不断增大,当F68的质量分数为20%时,其冲击强度提高了117.61%;改性PMMA的储能模量在玻璃化转度温度以上时随着F68含量的增加不断增大,而损耗因子的峰值温度逐渐降低;改性PMMA具有较好的光学透明性能,当F68的质量分数在20%以内时,改性PMMA透光率的降低小于2%。
Polymethyl methacrylate（PMMA） was modified by block copolymer F68 via in situ toughening.The mechanical properties,optical transparency and fracture morphology,as well as the modification mechanism,were investigated.The results show that the F68 exhibited a good toughening effect on PMMA.The impact strength of the modified PMMA increased with increasing the F68 content.It could be improved by 117.61% when the content of block copolymer F68 reached 20wt%.The storage modulus of the modified PMMA increased with increasing the F68 content before the temperature reached the glass transition temperature,and the loss factor,however,was on the contrary.The modified PMMA showed preferable optical transparency.The decrease of the light transmittance was less than 2% when the content of F68 was below 20wt%.
出处
《机械工程材料》
CAS
CSCD
北大核心
2012年第1期97-100,共4页
Materials For Mechanical Engineering
基金
江西省教育厅科研项目(GJJ10723)
关键词
聚甲基丙烯酸甲酯
嵌段共聚物
增韧改性
透明性
polymethyl methacrylate
block copolymer
toughening modification
transparency
