Effect of styrene oligomers on syndiospecific polymerization of styrene

Chromatographic pattern in recycled high-impact polystyrene (HIPS) – Occurrence of low molecular weight compounds during the life cycle

“…Some of these trimers, such as 1,3,5-triphenylhexene-5 (peak 59) and the four different diastereomers of 1-phenyl-4-(1-phenylethyl)-tetralin (peaks 63e66), could be identified through bibliographic comparison of their mass spectra [17,18]. These compounds have been also reported to be formed during the polymerisation of styrene [15e17, 19,20] and therefore retained as polymerisation residues.…”

Cumene Hydroperoxide-Induced Epoxidation of Styrene Using Cu2O and PbO as Catalysts

“…indicates the incidence of styrene oligomerization. 28 As a consequence of the TPP treatment of the reaction mixtures prior to chromatographic and mass spectral analyses, unconverted TPP and produced TPPO can also be found in the chromatograms. Mass spectra of these compounds are listed in Section S.3 of the Supporting Information.…”

“…Furthermore, the presence of high boilers such as 1-phenyl tetralin, 1,2-diphenylcyclobutane, 1,3-diphenylbutene-3, 1-phenyl-4-phenylethayl tetralin, etc . indicates the incidence of styrene oligomerization . As a consequence of the TPP treatment of the reaction mixtures prior to chromatographic and mass spectral analyses, unconverted TPP and produced TPPO can also be found in the chromatograms.…”

Syndiotactic polystyrene: Process and applications

“…However, if the styrene monomer is carefully purified, it tends to a faster thermal polymerization, accompanied with oligomer formation, thus decreasing the polymerization rate of the subsequent syndiospecific polymerization as well as the molecular weight of the resulting polymers. 10 This might cause problems if the continuously running process is interrupted. For example, an immediate increase of styrene dimers, trimers, and tetramers with increasing storage time of styrene on alumina can be observed, as shown in Fig.…”