期刊
POLYMER
卷 261, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2022.125405
关键词
Phenolic resin; Aging; Viscosity-temperature index
资金
- National Key Research and Develop- ment Program of China
- Young Scientists Fund of the National Natural Science Foundation of China
- Science and Technology Commission of Shanghai Municipality
- [2021YFB3703900]
- [21903013]
- [22ZR1401300]
This study systematically investigates the early aging of resin solutions and formulates equations and a master surface to accurately identify the aging degree of phenolic resin solutions.
Dipping in solutions of phenolic resins is a common practice in obtaining various composite materials. One key control requirement is to identify the degree of aging of resin solutions in the dip tank, which would age inevitably through time. This work systemically studies the early aging of resin solutions, accompanied by the increase of molecular weights, viscosity, and glass transition temperature. Using rheological methods, this work formulates equations relating the viscosity, aging time, aging temperature, and measurement temperature, and provides a master surface. The aging time - aging temperature superposition is also validated. Based on the shifting factor, the unmeasurable slow aging around room temperature can now be predicted. During the early stage of aging, the glass transition temperature of the solution increases significantly. We propose a viscosity -temperature index, for instance, the ratio of viscosities at 0 and 30 degrees C. It can significantly reduce the error due to solution density, concentration, and viscosity measurement, and can be determined by a low-cost Brookfield-like viscometer near the production line. Combing the universal master curve of the viscosity-temperature index, now we can conveniently and precisely identify the aging degree of phenolic resin solutions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据