Thermal degradation in bulk and thin films of 2-, 4-, and 6-arm polystyrene stars with a C60 core

Pozdnyakov, O. F.; Pozdnyakov, A. O.; Schmaltz, Bruno; Mathis, C.

doi:10.1016/j.polymer.2005.12.033

Cited by 18 publications

(27 citation statements)

References 21 publications

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“…While the thermograms shown in Supporting Information Figure S8 may initially seem dissimilar, the first differentials of the thermal process show a comparable set of four peaks occuring in each sample. The first peak, around 80 °C, is associated with residual solvent evaporation . The second, at 290 °C is associated with the loss of comonomer side‐chains, representing approximately 50% of the whole weight.…”

Section: Resultssupporting

confidence: 89%

“…Similarly, Soxhlet extraction appeared to be the easiest way to recover the synthesized product . We tried other techniques such as: precipitation of the reaction product in methanol and n ‐hexane followed by filtration; and silica column extraction with n ‐hexane, toluene and chlorobenzene phases . The former technique yielded C 60 ‐rich samples contaminated with residual copper(II) bromide, while the latter efficiently separated unreacted C 60 , polymerized material, insoluble highly cross‐linked phases, copper salts, but also exposed the crude material to light and air.…”

Section: Resultsmentioning

confidence: 99%

“…The third peak, around 380 °C is consistent with the C 60 release reported by Pozdnyakov et al The last peak at 440 °C is possibly due to the departure of CH 2 Br groups. These degradation profiles are consistent with those found previously for polystyrene stars with C 60 cores . Without chromatographic techniques, a complete corroboration of the degradation products is not possible.…”

Section: Resultsmentioning

confidence: 99%

“…The proposed ATRAP mechanism is fully detailed in the supporting information (Supporting Information, Figure S1). In effect, the polymerization is a polycondensation, however, it may also follow an equilibrium which can shift in the direction of the reagents, due to rupture of relatively weak methylene‐C 60 bonds …”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Oligo- and poly(fullerene)s for photovoltaic applications: Modeled electronic behaviors and synthesis

Silva

Ramanitra

Bregadiolli

et al. 2017

J. Polym. Sci. Part A: Polym. Chem.

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The atom transfer radical addition polymerization (ATRAP) of fullerene to give poly(fullerene)s (PFs) for organic electronics is explored. Quantum chemistry maps the expected electronic behavior of PFs with respect to common electron acceptors, namely fullerene, phenyl‐C61‐butyric acid methyl ester and its bis‐adduct, and mono‐ and bis‐indine‐fullerene derivatives. Surprisingly, it is found that PFs should demonstrate electron affinities and LUMO energy levels closer to the bis‐derivatives than the mono‐adducts, even though only one C60 double‐bond is used in PF chain formation. A self‐consistent library of PFs is synthesized and a correlation between structural characteristics and molecular weights is found. While comonomers with –OC16H33 linear side‐chains lead to the highest known ATRAP molecular weights of 21000 g mol−1, like‐for‐like, branched side‐chains permit syntheses of higher molecular weights and more soluble polymers. Of the series, however, PFs with ‐OC12 side‐chains are expected to be of the greatest interest for opto‐electronic applications due to their ease of handling and highest regioregularity. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 1345–1355

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Oligo- and poly(fullerene)s for photovoltaic applications: Modeled electronic behaviors and synthesis

Silva

Ramanitra

Bregadiolli

et al. 2017

J. Polym. Sci. Part A: Polym. Chem.

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“…28,29 This hindered purification, an important point given that even minute quantities of metal catalysts and other impurities can reduce device productivities.…”

mentioning

confidence: 99%

Increased thermal stabilization of polymer photovoltaic cells with oligomeric PCBM

Ramanitra

Dowland

Bregadiolli³

et al. 2016

J. Mater. Chem. C

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The first oligomerisation of phenyl-C 61 -butyric acid methyl ester (PCBM) using a facile atom transfer radical addition polymerization (ATRAP) and its exploitation for organic photovoltaic devices is described.Oligo{(phenyl-C 61 -butyric acid methyl ester)-alt-[1,4-bis(bromomethyl)-2,5-bis(octyloxy)benzene]} (OPCBMMB) shows opto-electronic properties equivalent to those of PCBM but has a higher glass transition temperature. When mixed with various band gap semiconducting polymers, OPCBMMB delivers performances similar to PCBM but with an enhanced stabilization of the bulk heterojunction in photovoltaic devices on plastic substrates under thermal stress, regardless of the degree of crystallinity of the polymer and without changing opto-electronic properties.

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Role of Mass Spectrometry in the Elucidation of Thermal Degradation Mechanisms in Polymeric Materials

Rizzarelli¹,

Carroccio²

2015

Reactions and Mechanisms in Thermal Analysis of Advanced Materials

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Thermal degradation in bulk and thin films of 2-, 4-, and 6-arm polystyrene stars with a C60 core

Cited by 18 publications

References 21 publications

Oligo- and poly(fullerene)s for photovoltaic applications: Modeled electronic behaviors and synthesis

Oligo- and poly(fullerene)s for photovoltaic applications: Modeled electronic behaviors and synthesis

Increased thermal stabilization of polymer photovoltaic cells with oligomeric PCBM

Role of Mass Spectrometry in the Elucidation of Thermal Degradation Mechanisms in Polymeric Materials

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