2008届硕士毕业生 |
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论文题目:不同基材上纳米金膜的性能探索 毕业学生:姜先果 指导老师:吴唯教授、诸富根 中文摘要:
Triblock copolymer Pluronic F127 was reacted with p-toluenesulfonyl chloride, potassium phthalimide and ethylenediamine in turn to modify the end hydroxyls of F127 to amino end groups. Using the amino end groups, the bioactive macromolecular folic acids were conjugated to the end group of F127 as the targeting ligand, aH NMR and IR were adopted to characterize the structures of the folate-capped F127 copolymers. The micelle solutions of F127-folate were prepared by the dialysis method. The morphologies of the copolymers in water were investigated by TEM. The results proved that F127-folate could self-assemble into micelles in water.
论文题目:极性化SBS/PS共混热塑性弹性体制备及其研究 毕业学生:李娜 指导老师:吴唯教授 中文摘要: 通过共混挤出方法制备了新型热塑性弹性体PSBS/PS,考察了其加工性能、力学性能、热性能和微观形态,研究了PS用量、软化剂、无机填料和化学交联对PSBS/PS热塑性弹性体性能的影响。 研究发现加入PS可有效提高PSBS的加工性能,当PS含量为40-50wt%时,PSBS/PS共混材料的加工流动性较好;随PS含量的增加,共混材料的拉伸强度、弯曲强度提高,断裂伸长率减小;PS用量为50wt%时,共混材料的综合性能较好。加入少量软化剂环烷油有利于PSBS/PS共混体系加工流动性能的提高,但会造成力学强度下降。超细CaCO3含量为30wt%时,PSBS/PS/CaCO3共混材料的综合性能较好,且添加经偶联剂分散活化处理的超细CaCO3,对PSBS/PS共混材料的填充补强效果更加明显。加入适量DCP,可引发共混体系中S嵌段、B嵌段之间的交联,并形成相对较小的交联体颗粒尺寸,使PSBS/PS共混热塑性弹性体材料力学性能进一步提高;最理想的DCP含量为0.3wt%。 PSBS/PS熔融共混理论研究发现,当PS加入量较少时,体系中“S”嵌段物理交联作用更为明显;进一步增大PS用量,则体系相结构发生转变,“S”相和“B”相两相相互交错,成为互锁的共连续态结构。 |
地址:华东理工大学中德先进材料联合研究中心 邮编:200237 联系电话:021-64253480 电子邮箱:wuwei@ecust.edu.cn |