通过自由基共聚反应合成了以甲基丙烯酸缩水甘油酯（GMA）、甲基丙烯酸羟丙酯（HPMA）、丙烯酸异辛酯（EHA）及苯乙烯（St）为单体的共聚物P（GMA-HPMA-EHA-St）（PGHES）,用含异氰酸根的不饱和单体丙烯酸羟乙酯（HEA）-异佛尔酮二异氰酸酯（IPDI）对PGHES进行接枝改性得到得到含聚氨酯（PU）结构的聚丙烯酸酯共聚物PGHES-PUA。傅立叶红外光谱测试表明得到目标产物。用PGHES-PUA对环氧树脂（EP）进行改性,研究了体系的力学性能及热性能,结果表明,PGHES-PUA改性后的环氧树脂冲击强度提高,增韧改性效果较好,动态热机械分析（DMA）测试了体系的动态力学性能。热分析（DSC）和热重分析（TGA）表明体系的玻璃化转变温度及耐热性无明显变化。扫描电镜（SEM）分析表明PGHES-PUA在EP固化时发生微相分离。
A series of copolymers P（GMA-HPMA-EHA-St）（PGHES） were synthesized via free radical copolymerization with glycidylmethacrylate（GMA）,2-hydroxypropyl methacrylate（HPMA）,2-ethylhexyl acrylate（EHA）,and styrene（St）,and PGHES was modified with a prepolymer of half blocked IPDI-HEA which was synthesized using isophorone diisocyanate（IPDI） and 2-hydroxyethyl acrylate（HEA）,preparing copolymer PGHES-PUA.The FT-IR characterization reveals that the target product is obtained.Epoxy resin（EP） was modified by PGHES-PUA copolymers,and the mechanical and thermal properties of modified EP were studied.The results show that impact strength of modified EP significantly increases with increasing content of PGHES-PUA,which results in the good toughness of the modified epoxy resins.The behavior of the relaxation peaks was evaluated by dynamic mechanical analysis（DMA） and tried to explain the composition of networks.SEM micrographs present the phase separation,and the PGHES-PUA particles precipitate and distribute well in epoxy matrix.
参考文献
| [1] | 潘光君,辛浩波,陈由亮.聚氨酯接枝改性环氧树脂的制备和性能[J].高分子材料科学与工程,2008(12):66-69. |
| [2] | 范宏,王建黎.PBA／PMMA型核壳弹性粒子增韧环氧树脂研究[J].高分子材料科学与工程,2001(01):121-124. |
| [3] | 石敏先,黄志雄,郦亚铭,杨国瑞.端羧基丁腈橡胶改性环氧树脂的结构与性能[J].高分子材料科学与工程,2008(02):47-50. |
| [4] | 王小兵,何尚锦,张保龙,郑威,金子明.丙烯酸酯嵌段共聚物合成及其改性环氧树脂的研究[J].工程塑料应用,2007(12):9-13. |
| [5] | K. Mimura;H. Ito;H. Fujioka .Toughening of epoxy resin modified with in situ polymerized thermoplastic polymers[J].Polymer: The International Journal for the Science and Technology of Polymers,2001(22):9223-9233. |
| [6] | Thomas R;Durix S;Sinturel C;Omonov T;Goossens S;Groeninckx G;Moldenaers P;Thomas S .Cure kinetics, morphology and miscibility of modified DGEBA-based epoxy resin - Effects of a liquid rubber inclusion[J].Polymer: The International Journal for the Science and Technology of Polymers,2007(6):1695-1710. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%