Syntheses of Functional Polymers Using Natural Products and Their Applications.

天然产物功能聚合物的合成及其应用。

基本信息

批准号：
04650833
负责人：
TSUNOOKA Masahiro
金额：
$ 1.22万
依托单位：
Osaka Prefecture University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1993
项目状态：
已结题

项目摘要

From the view points that new functional polymers should be in harmony with natural environment, new water soluble photo-functional polymers derived from natural products were synthesized and its applications were investigated.When poly (vinyl alcohol) (PVA) was reacted with methyl vinyl ketone (MVK) in the presence of a base, PVA bearing saturated carbonyl groups and alpha, beta-unsaturated carbonyl groups (PCPVA) was synthesized. Thin films of PCPVA upon UV irradiation at 254nm were found to become insoluble in water. From specteral analysis of photo-process of the PCPVA,photodimerization of pendant alpha, beta-unsaturated carbonyl groups was found to induce the insolubilization. The reaction of natural polymers and their derivatives which have hydroxy groups such as starch, methylcellulose, and pullulan were also investigated. alpha, beta-Unsaturated carbonyl groups were easily introduced in these polymers, and the photocrosslinking proceeded similarly. Although films of derivatives of pullulan (PCPln) were tough as well as those of PCPVA,films of derivatives of starch and methylcellulose were very brittle. PCPln was proved to bio-degrade by pullulanase.The PCPVA was found to be insolubilized thermally in the presence of sodium acetate. From spectral analysis, it was clarified that the crosslinking proceeded by aldol condensation of alpha, beta-unsaturated carbonyl groups with saturated carbonyl groups. Thermal crosslinking of PCPln is expected to occur similarly from their structure.From these results, natural polymers were found to be very promising as the resources for water soluble photo-functional polymers.

从新功能聚合物应与自然环境和谐相处的观点，合成了自然产物的新水溶性光合聚合物，并研究了其应用。当聚（乙烯基醇）（PVA）与甲基乙烯基酮反应时（MVK）在存在基础的情况下，合成了含有饱和羰基的PVA和α-不饱和羰基（PCPVA）。发现在254nm时紫外线照射时PCPVA的薄膜被发现不溶于水。从PCPVA的照片过程中的幽灵分析，吊坠α的光构化，发现β-不饱和羰基会诱导不溶化。还研究了具有淀粉，甲基纤维素和帕普兰等羟基基团的天然聚合物及其衍生物的反应。在这些聚合物中很容易引入α，β-不饱和羰基，并且光叠链链接也进行了类似的进行。尽管Pullulan（PCPLN）衍生物的胶片和PCPVA的胶片都是坚韧的，但淀粉和甲基纤维素的衍生物膜非常脆弱。 PCPLN被丙啉酶证明是生物降解的。在乙酸钠存在下，PCPVA被pCPVA被热脱透了。从光谱分析中，可以澄清说，交联是由α-与饱和羰基的Alpha，β-不饱和的羰基进行的。 PCPLN的热交联预计将从它们的结构类似。从这些结果，自然聚合物被认为是水溶性光电功能聚合物的资源非常有前途的。