期刊
JOURNAL OF APPLIED POLYMER SCIENCE
卷 97, 期 2, 页码 652-658出版社
WILEY-BLACKWELL
DOI: 10.1002/app.21808
关键词
resins; novolac; high ortho
The relationship between the use of 19 kinds of metal catalysts and the proportion of ortho-ortho links of novolac resins was studied. The proportion of ortho-ortho links of novolac resins was characterized with Fourier transform infrared, H-1-NMR, and C-13-NMR. The effects of different catalysts and different reaction conditions, such as the molar ratio of phenol to formaldehyde, the pH value of the reaction, and the reaction time, were examined. Phenolformaldehyde resins were synthesized with a certain proportion of the ortho position through the adjustment of the reaction conditions. (c) 2005 Wiley Periodicals, Inc.
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