Examination of the chemical changes in cured phenol-formaldehyde resins during storage

作者：Strzemiecka B^*; Zieba Palus J; Voelkel A; Lachowicz T; Socha E

来源：Journal of Chromatography A, 2016, 1441: 106-115.

DOI：10.1016/j.chroma.2016.02.051

• Phenol-formaldehyde resins
• Aging
• Py-GCMS
• FT-NIR
• Inverse gas chromatography

Chemical changes occurring within cured phenol-formaldehyde resins (resite and novolak type) during their storage were investigated by FT-NIR, py-GCMS and inverse gas chromatography. It was shown that a mixture of resite with novolak was less stable than resite or novolak itself as regards bulk properties. This aging phenomenon is mainly due to reaction of ammonia (product of hexa decomposition) with -CH2OH groups present in resite. FT-NIR technique seems to be the least sensitive method for assessment chemical changes occurring during cured resins storage. Applications of py-GCMS and IGC method made able to indicate that more significant changes were for bulk samples (py-GCMS results) than on their surface (IGC results).

• 出版日期2016-4-8