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%.
参考文献
| [1] | 伍雪强 .有机玻璃的增韧改性研究[D].苏州大学,2009. |
| [2] | 陈卢松,黄争鸣,董国华,何创龙.PMMA透光纳米复合材料的制备[J].航空材料学报,2008(01):59-64. |
| [3] | 余林华,张明祖.改性纳米SiO2粒子增韧PMMA[J].合成树脂及塑料,2009(02):34-37. |
| [4] | 袁金颖,左光汉,左晓兵,黄飞鹤.共聚交联改性有机玻璃的研制与性能研究[J].高分子材料科学与工程,1999(05):154-156. |
| [5] | 房春燕,曾舒,薛涛,孙军平.纳米SiO2改性PMMA透明性的研究[J].化工新型材料,2007(11):42-44. |
| [6] | YU Lin-hua,张明祖.抗冲击改性剂ACR增韧有机玻璃的研究[J].塑料工业,2008(08):55-56. |
| [7] | 伍雪强,张明祖,杨旭.共聚尼龙增韧改性有机玻璃的研究[J].塑料工业,2009(03):40-42. |
| [8] | Robert B.Grubbs;Jennifer M.Dean;Margaret E.Broz;Frank S.Bates .Reactive Block Copolymers for Modification of Thermosetting Epoxy[J].Macromolecules,2000(26):9522-9534. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%