以聚乙烯醇和间硝基苯甲醛为原料,对甲苯磺酸为催化剂,合成了聚乙烯醇缩间硝基苯甲醛(PVMNB),探讨了反应物物料比、反应温度、反应时间对PVMNB缩醛度的影响,获得适宜的工艺条件为:PVA(-OH)和间硝基苯甲醛的物质的量比为2:1,反应温度100℃,反应时间9 h,此时PVMNB为86%.通过衰减全反射-傅里叶红外光谱、紫外可见光谱、核磁共振氢谱等测试手段对PVMNB结构进行了表征,利用差示扫描量热仪(DSC)测定了PVMNB的玻璃化转变温度(Tg),采用差热分析(DTA)和热重分析(TGA)对PVMNB的热稳定性进行了研究.DSC结果表明,PVMNB的玻璃化转变温度为131℃,DTA和TGA结果表明,PVMNB热稳定性良好,在空气中250℃未见分解.
参考文献
| [1] | Mansur HS;Sadahira CM;Souza AN;Mansur AAP .FTIR spectroscopy characterization of poly (vinyl alcohol) hydrogel with different hydrolysis degree and chemically crosslinked with glutaraldehyde[J].Materials science & engineering, C. Biomimetic and supramolecular systems,2008(4):539-548. |
| [2] | Chen SC;Zhou ZX;Wang YZ;Wang XL;Yang KK .A novel biodegradable poly(p-dioxanone)-grafted poly(vinyl alcohol) copolymer with a controllable in vitro degradation[J].Polymer: The International Journal for the Science and Technology of Polymers,2006(1):32-36. |
| [3] | Ezequiel S. Costa-Junior;Edel F. Barbosa-Stancioli;Alexandra A.P. Mansur .Preparation and characterization of chitosan/poly(vinyl alcohol) chemically crosslinked blends for biomedical applications[J].Carbohydrate Polymers: Scientific and Technological Aspects of Industrially Important Polysaccharides,2009(3):472-481. |
| [4] | Gu S;He GH;Wu XM;Guo YJ;Liu HJ;Peng L;Xiao GK .Preparation and characteristics of crosslinked sulfonated poly (phthalazinone ether sulfone ketone) with poly(vinyl alcohol) for proton exchange membrane[J].Journal of Membrane Science,2008(1/2):48-58. |
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