论文部分内容阅读
通过阳离子本体聚合方法合成了二氧戊环均聚物,并通过核磁共振谱仪、凝胶色谱仪以及热重分析仪表征了该聚合物的分子结构、分子量及分子量分布,以及热稳定性。实验通过将该聚合物与共聚甲醛(POM)按一定比例共混,研究了其对POM结晶性能的影响。采用差示扫描量热仪测试了不同样品的玻璃化转变曲线及恒速率降温结晶曲线;采用偏光显微镜,研究了不同样品的结晶形貌。实验结果表明:聚二氧戊环与POM具有较好的相容性,其加入可有效降低POM的结晶速率,同时,POM球晶尺寸逐渐增加,但当添加量大于6%时,球晶尺寸均一性和结晶形貌明显变差。
The dioxolane homopolymer was synthesized by cationic bulk polymerization. The molecular structure, molecular weight and molecular weight distribution, and thermal stability of the polymer were characterized by NMR, TG and TG-IR. In the experiment, the polymer and the copolymer of formaldehyde (POM) by a certain percentage of blending, studied its POM crystallization performance. The glass transition curve and the constant temperature cooling crystallization curve of different samples were tested by differential scanning calorimeter. The crystallization morphology of different samples was studied by polarized light microscope. The experimental results show that polydioxolane has good compatibility with POM. The addition of PO2 can effectively reduce the crystallization rate of POM. Meanwhile, the spherulite size of POM gradually increases, but when the addition amount is more than 6%, the spherulite size Homogeneity and crystalline morphology were significantly poorer.