Graft copolymerization of acrylonitrile onto polystyrene

²

,

Wilkie

³

et al. 1999

Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.

“…8 respectively, exhibited both endo-and exothermic features, the latter very likely reflecting the discontinuity in the TGA curves. The difference in the thermal stability and in the course of the decomposition of the two homopolymers observed in this work is well known and in this connection credit has to be given to earlier work concerning the thermal degradation of PBD 11,12,13,14,15,16 , of PSt 17,18,19,20,21,22,23,24,25 and PBD-PSt copolymer. 26,27 3.2.…”

Section: Thermal Degradation Of Unirradiated Homo-and Copolymersmentioning

confidence: 62%

“…Table 1 presents a list of the polymers and their weight average molar mass. Poly(styrene-co-butadiene) K-Resin (K) styrene (75), butadiene (25) 5-10×10 3 Poly(styrene-co-butadiene) SBS (B) styrene (25), butadiene…”

Section: Methodsmentioning

confidence: 99%

Thermal degradation of polystyrene, poly(1,4-butadiene) and copolymers of styrene and 1,4-butadiene irradiated under air or argon with 60Co-γ-rays

Schnabel

¹

,

²

,

Wilkie

³

et al. 1999

Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.

“…A graft copolymer has been produced by the addition of acrylonitrile onto polystyrene using an anionic copolymerization process [35], [36] . In order to offer thermal protection by a graft copolymerization process, it is necessary that the graft layer degrades first and forms a char which can protect the underlying layer.…”

Section: Degradation Of Styrene-based Graft Copolymersmentioning

confidence: 99%

TGA/FTIR: an extremely useful technique for studying polymer degradation

Wilkie

¹

1999

Self Cite

Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.

“…Reactions have also been carried out using both dicumyl peroxide, DCP, and di-t-butyl peroxide, TBP, as initiator. These reactions were carried out in tetrachloroethylene as solvent since both DCP and TBP have half-lives at 120°C, the boiling point of the solvent, which are roughly comparable to the half-life of BPO at the boiling point of chloroform [22] . No evidence for cross-linking was found even after 24 h at reflux.…”

Section: Solution Cross-linking Processes 341 Cross-linking Behaviormentioning

confidence: 99%

“…In an attempt to merge these two processes the crosslinking reaction was carried out using an intimate polymer-initiator blend at somewhat modest temperatures. Two initiators, BPO and DCP, have been used; the half-lives for BPO at 70°C and DCP at 120°C are similar so reactions have been performed at these temperatures [22] .…”

Section: The Effect Of Cross-linking On Thermal Stabilitymentioning

confidence: 99%

Thermal decomposition of cross-linked polybutadiene and its copolymers

Jiang

¹

,

²

,

³

et al. 1999

Self Cite