Synthesis and Properties of New Organosoluble Alkoxylated Naphthalene-Based Novolacs Preparaed by Addition-Condensation of Mono- or Di-alkoxynaphthalene with Formaldehyde

Synthesis and Properties of New Organosoluble Alkoxylated Naphthalene-Based Novolacs Preparaed by Addition-Condensation of Mono- or Di-alkoxynaphthalene with Formaldehyde
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单烷氧基萘和二烷氧基萘与甲醛加成缩合制备新型有机可溶性烷氧基萘基酚醛清漆的合成及性能

DOI:
10.1295/polymj.pj2008035
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发表时间:
2008
期刊:
影响因子:
2.8
通讯作者:
G. Konishi
G. Konishi
中科院分区:
化学3区
文献类型:
--
作者:
T. Nemoto;G. Konishi

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本文介绍了一、二甲氧基萘与甲醛在酸催化下的加成-缩合反应制备新型烷氧基萘系酚醛树脂[聚萘亚甲基S]。将2-甲氧基萘(1)与等摩尔甲醛进行均相聚合,得到了产率较高的聚合物2(Mn3100,Mw/Mn1.7)。FT-IR、~1H和~(13)C核磁共振谱表明,2可能含有一个萘-亚甲基单元和近似线性的聚合物主链。相反,在1,5-二甲氧基萘(3a)为单体的情况下,得到的聚合物(4a)(Mn1900,Mw/Mn2.3)是支化聚合物。根据热重分析,聚合物2和4a的T10(失重10%时的温度)指数分别为402和359°C。这些结果表明烷氧基化的萘系酚醛树脂具有良好的热稳定性。
The preparation of new alkoxylated naphthalene-based novolacs [poly(naphthylenemethylene)s] by acid-catalyzed addition-condensation of mono- or di-methoxynaphthalene with formaldehyde is described in this paper. The polymerization of 2-methoxynaphthelene (1) with an equimolar amount of formaldehyde proceeded homogeneously to give the polymer 2 (M n 3100, M w /M n 1.7) in good yield. The FT-IR, 1 H NMR and 13 C NMR spectra suggest that 2 might have a naphthylene-methylene unit and approximately linear polymer backbones. In contrast, in the case of 1,5-dimethoxynaphthalene (3a) as a monomer, the obtained polymer (4a) (M n 1900, M w /M n 2.3) was a branched polymer. From TGA, T 10 (temperature at 10% loss in weight) indexes of the polymers 2 and 4a were estimated to be 402 and 359 °C, respectively. These results indicate that the alkoxylated naphthalene-based novolacs have good thermal stability.
DOI: 10.1295/polymj.pj2005224
发表时间: 2006-06
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影响因子: 2.8
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