Polystyrene SIMS analysis

This methodology has also been applied successfully for the synthesis of primary amine-functionalized polystyrenes, polyi-soprenes, and polydimethylsiloxanes as shown in eqn [37] for polystyrene (Afn = 2200-21 300gmor ) using a silyl chloride with a bistrimethylsilyl-proteaed amine group. The amine functionalities determined by titration after deprotection varied from 0.87 to 1.04. The structures were also confirmed by MALDI-SIMS analysis and it was stated that significant amounts of unfunctionalized material were absent in the spectra. 

Vanden Eynde, X., Bertrand, E. (1999) Quantification of polystyrene blend surfaces based on end group ToF-SIMS analysis. Appl Surf. Set, 141,1-20. 

Table 2. XPS and ToF-SIMS analysis of lactose aryl diazirine grafted PS. XPS atomic percentages are displayed for samples A, B and C. Sample A corresponds to as received polystyrene. Sample B corresponds to polystyrene on which a methanoUc solution of lactose aryl diazirine was deposited, and no light activation was performed before the final washing. This surface should be similar to sample A. Sample C corresponds to polystyrene on which a methanolic solution of lactose aryl diazirine was deposited and light activation was performed before the final washing. The molecule should be present at the surface of the material. Three areas were analyzed per sample, after [105]...

Figure 1 shows a positive static SIMS spectrum (obtained using a quadrupole) for polyethylene over the mass range 0—200 amu. The data are plotted as secondary ion intensity on a linear y-axis as a function of their chaige-to-mass ratios (amu). This spectrum can be compared to a similar analysis from polystyrene seen in Figure 2. One can note easily the differences in fragmentation patterns between the...

Vanden Eynde X, Bertrand P (1997) ToF-SIMS quantification of polystyrene spectra based on principal component analysis (PCA). Surf Interface Anal 25 878... 

Figure 8.14 Positive ion ToF SIMS spectrum of polystyrene. (Reproduced with permission from D. Briggs, Surface Analysis of Polymer by XPS and Static SIMS, Cambridge University Press, Cambridge, UK. 1998 Cambridge University Press.)...

SIMS has proved to be a very useful tool in polymer film studied and accordingly wear analysis. Various polymers have been fingerprinted with SIMS including in addition to those already discussed, low density polyethylene, polypropylene, polystyrene, nylon-6 and polyethylene terephthalate (8,9). 

The first LCA from Franklin and Associates is dated but can provide a starting point in discussing LCAs of plastics for packaging. The Franklin LCA compares the environmental impacts of PS, paper, and PLA packaging materials. Franklin and Associates use SIM Pro LCA software with a database of LCI data. Food service items were produced from polystyrene foam, paper, and PLA. The food service items included cups, plates, and clamshells. Only the clamshell data are analyzed in the following analysis (LCI Food Service Products 2(X)6). 

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