近些年来乳液聚合用于脆性聚合物的改性研究越来越受到重视.采用氧化还原引发体系、种子乳液聚合方法制备了不同核-壳比的核-壳结构共聚物聚丙烯酸丁酯/甲基丙烯酸甲酯(PBM)乳液,单体总转化率达99.75％,乳胶粒径(dz)在353.3 nm左右,粒径多分散指数(PDI)均小于0.075,表明胶束无二次成核过程;透射电镜观察到PBM明显的核壳结构.当核壳比为75/25时出现脆-韧转变,聚对苯二甲酸丁二醇酯(PBT)/PBM(100/20)共混物的缺口冲击强度达到最大值,为纯PBT的8.63倍.动态力学性能分析结果表明,橡胶相的内耗峰向高温方向移动,PBT的向低温方向移动,力学损耗峰变宽,且当核壳比为75/25时,两峰间的差值最小,说明此时的PBM与PBT间相容性最好.SEM观察共混物的冲击断面证实了力学性能的变化.
参考文献
| [1] | Bin You;Daojun Zhou;Lei Liu .Preparation of HALS-Functional Core-Shell Nanoparticles and their Application in Poly(Butylene Terephthalate)[J].Polymer-Plastics Technology and Engineering,2013(7/9):946-953. |
| [2] | Hao-Ran Yang;Gan-Ji Zhong;Jun Lei .Morphology and Crystallization Behavior of Compatibilized Isotactic Polypropylene/Poly(butylene terephthalate) Blends under Shear Flow[J].Polymer-Plastics Technology and Engineering,2012(4/6):507-513. |
| [3] | Tomar N;Maiti SN .Mechanical properties of PBT/ABAS blends[J].Journal of Applied Polymer Science,2007(3):1807-1817. |
| [4] | Arostegui A.;Nazabal J. .Supertoughness and critical interparticle distance dependence in poly(butylene terephthalate) and poly (ethylene-co-glycidyl methacrylate) blends[J].Journal of Polymer Science, Part B. Polymer Physics,2003(19):2236-2247. |
| [5] | W. Hale;H. Keskkula;D. R. Paul .Compatibilization of PBT/ABS blends by methyl methacrylate-glycidyl methacrylate-ethyl acrylate terpolymers[J].Polymer: The International Journal for the Science and Technology of Polymers,1999(2):365-377. |
| [6] | Yan Fu;Haihe Song;Chao Zhou .Influence of Core-Shell Particles Structure on the Morphology and Brittle-Ductile Transition of PBT/ABS-g-GMA Blends[J].Polymer Composites,2013(1):15-21. |
| [7] | Sun, S.;Zhang, F.;Fu, Y.;Zhou, C.;Zhang, H. .Properties of poly(butylene terephthalate)/bisphenol A polycarbonate blends toughening with epoxy-functionalized acrylonitrile-butadiene-styrene particles[J].Journal of Macromolecular Science. Physics,2013(4/6):861-872. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%