Pyrolysis mass spectrometry analysis of poly(vinyl acetate), poly(methyl methacrylate) and their blend coalesced from inclusion compounds formed with γ-cyclodextrin

Date

2006-01-01

Author

Uyar, Tamer
Aslan, Evren
Tonelli, Alan E.
Hacaloğlu, Jale

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Direct insertion probe pyrolysis mass spectrometry (DIP-MS) analyses of poly(methyl methacrylate) (PMMA), poly(vinyl acetate) (PVAc) and binary PMMA/PVAc guests, coalesced from their inclusion compounds (ICs) formed with host gamma-cyclodextrin (gamma-CD) through removal of the gamma-CD host, have been performed. A slight increase in the thermal stabilities of the coalesced polymers were recorded both by TGA and DIP-MS compared to the corresponding as-received polymers. The DIP-MS observations pointed out that the thermal stability and degradation products of these polymers are affected once they are included inside the IC channels created by the stacked host gamma-CDs. DIP-MS observations suggested that the degradation mechanisms for PMMA and PVAc chains in their coalesced blend were significantly altered from those observed in their as-received and solution blended samples. This was attributed to the presence of specific molecular interactions between the intimately mixed PMMA and PVAc chains in their coalesced blend.

Subject Keywords

Cyclodextrin, Inclusion compound, Poly(methyl methacrylate), Poly(vinyl acetate), Blend, Thermal degradation

URI

https://hdl.handle.net/11511/31732

Journal

Polymer Degradation and Stability

DOI

https://doi.org/10.1016/j.polymdegradstab.2005.05.002

Collections

Graduate School of Natural and Applied Sciences, Article

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Pyrolysis mass spectrometry analysis of polycarbonate/poly(methyl methacrylate)/poly(vinyl acetate) ternary blends Uyar, Tamer; Rusa, Cristian C.; Tonelli, Alan E.; Hacaloğlu, Jale (2007-01-01) Direct insertion probe pyrolysis mass spectrometry (DIP-MS) analyses of polycarbonate/poly(methyl methacrylate)/poly(vinyl acetate), (PC/PMMA/PVAc), ternary blends have been performed. The PC/PMMA/PVAc ternary blends were obtained by coalescing from their common gamma-cyclodextrin-inclusion compounds (CD-ICs), through the removal of the gamma-CD, host (coalesced blend), and by a co-precipitation method (physical blend). The coalesced ternary blend showed different thermal behaviors compared to the co-precip...
Thermal degradation processes of poly(carbonate) and poly(methyl methacrylate) in blends coalesced either from their common inclusion compound formed with γ-cyclodextrin or precipitated from their common solution Uyar, Tamer; Oguz, Gulcan; Tonelli, Alan E.; Hacaloğlu, Jale (2006-10-01) Direct insertion probe pyrolysis mass spectrometry (DIP-MS) analyses of a PC/PMMA blend, coalesced from their common inclusion compound (ICs) formed with host gamma-cyclodextrin (gamma-CD) through removal of the gamma-CD host, and a physical PC/PMMA blend, precipitated from their common solution, have been performed and compared with those of the coalesced and as-received homopolymers. A slight increase in the thermal stability of the PMMA component in the presence of PC was recorded both by TGA and DIP-MS ...
Thermal degradation of polycarbonate, poly(vinyl acetate) and their blends Uyar, Tamer; Tonelli, Alan E.; Hacaloğlu, Jale (2006-12-01) We have recently developed a novel approach for intimately mixing thermodynamically incompatible polymers, which utilizes the formation of inclusion compounds (ICs) formed with host cyclodextrins (CDs), followed by removal of CD and coalescence of the common guest polymers into a blend. In this paper direct insertion probe pyrolysis mass spectrometry (DIP-MS) analyses of polycarbonate (PC), poly(vinyl acetate) (PVAc) and PC/PVAc blends, obtained by coalescence from their inclusion compounds formed with host...
Pyrolysis mass spectrometry analysis of thiophene capped poly(methyl methacrylate) and poly(methylthienyl methacrylate) Hacaloğlu, Jale; Toppare, Levent Kamil (2003-06-01) The thermal degradations of thiophene-capped poly(methyl methacrylate) and poly(methylthienyl methacrylate) were studied via direct pyrolysis mass spectrometry. No significant effect of heating rate on the thermal degradation behaviors of the polymers under investigation have been observed in the heating range studied. It has been determined that thermal degradation of thiophene-capped poly(methyl methacrylate), (TPMMA) mainly yields monomer as in the case of pristine poly(methyl methacrylate). An analogous...
Intimate blending of binary polymer systems from their common cyclodextrin inclusion compounds Uyar, Tamer; Rusa, Cristian C.; Wang, Xingwu; Rusa, Mariana; Hacaloğlu, Jale; Tonelli, Alan E. (2005-09-15) A procedure for the formation of intimate blends of three binary polymer systems polycarbonate (PC)/poly(methyl methacrylate) (PMMA), PC/poly(vinyl acetate) (PVAc) and PMMA/PVAc is described. PC/PMMA, PC/PVAc, and PMMA/PVAc pairs were included in gamma-cyclodextrin (gamma-CD) channels and were then simultaneously coalesced from their common gamma-CD inclusion compounds (ICs) to obtain intimately mixed blends. The formation of ICs between polymer pairs and gamma-CD were confirmed by wide-angle X-ray diffract...

Citation Formats

T. Uyar, E. Aslan, A. E. Tonelli, and J. Hacaloğlu, “Pyrolysis mass spectrometry analysis of poly(vinyl acetate), poly(methyl methacrylate) and their blend coalesced from inclusion compounds formed with γ-cyclodextrin,” Polymer Degradation and Stability, pp. 1–11, 2006, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/31732.