A multi-analytical approach to studying binding media in oil paintings
Characterisation of differently pre-treated linseed oil by DE-MS, TG and GC/MS
; oxygen is added; and dimers are formed due to Diels–Alder cyclisation [ 11 , 12 ]. As a result of double bond isomerisation, suberic and sebacid acids increase with respect to azelaic acid, and they may indicate whether or not the oil has been pre
the reactor applications for online analysis of Diels–Alder and retro Diels–Alder reactions (Figure 4 (b)) [ 36 ]. Figure 4. 3D-printed microreactors. (a) 3D
Investigation of polymers by a novel analytical approach for evolved gas analysis in thermogravimetry
Gas chromatography comprehensively coupled to single photon ionization mass spectrometry
polyolefinic moieties mainly benzene is formed beside naphthalene and toluene as it is presented in Fig. 4 b. Bockhorn et al. [ 46 ] proposed a Diels–Alder-type reaction for the formation of benzene moieties and a radical chain mechanism for the
decomposition result from the fact that the macromolecules of BR contain 87–93% mers with a cis 1–4 structure. During the initial stage of pyrolysis butadiene mers react, according to Diels-Alder's mechanism, with alkanes (C 1 –C 3 ) and alkenes (C 2 –C 6
Study of thermal properties of intumescent additive
Pentaerythritol phosphate alcohol
. Occurrence of several complex, parallel and consecutive reactions in PEPA makes the degrading system to produce highly reactive and sterically hindered methylenecyclopropene, which is amenable to isomerisation, Diels–Alder reaction and polymerization
In Table 3 , Ca–Zn degraded mixture with both stabilizers (I) and (II) give oscillating color as a function of time; this may be due to Diels–alder reaction between the –N=C– bond (dienophile) in both stabilizers I or II with the conjugated system in
] − indicated that compound 1 originated from luteolin and produced a fragment ion at m / z 133.0270 [ 1,3 B 0 ] − by retro-Diels-Alder (RDA) cleavage. Compound 5 (C 21 H 20 O 10 ) was observed at m / z 431.0971 ([M−H] − ion) in ESI-MS. Similarly, it
