Anisotropic Guest Diffusion in the δ Crystalline Host Phase of Syndiotactic Polystyrene:  Transport Kinetics in Films with Three Different Uniplanar Orientations of the Host Phase

Venditto, Vincenzo; Mauro, Anna De Girolamo Del; Mensitieri, Giuseppe; Milano, Giuseppe; Musto, Pellegrino; Rizzo, Paola; Guerra, Gaetano

doi:10.1021/cm051657s

Cited by 66 publications

(41 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This can be more easily observed, for diffusion experiments conducted at low activities, which assure guest sorption essentially only by the nanoporous crystalline phase [67,68,93].…”

Section: Diffusion Mechanisms In the D Crystalline Phasementioning

confidence: 92%

See 1 more Smart Citation

Understanding at molecular level of nanoporous and co-crystalline materials based on syndiotactic polystyrene

Milano

Guerra

2009

Progress in Materials Science

Self Cite

View full text Add to dashboard Cite

“…This can be more easily observed, for diffusion experiments conducted at low activities, which assure guest sorption essentially only by the nanoporous crystalline phase [67,68,93].…”

Section: Diffusion Mechanisms In the D Crystalline Phasementioning

confidence: 92%

“…Transport kinetic studies have conducted by using 1,2-dichloroethane (DCE) [67], carbon dioxide [93], and ethylene [68], as low-molecular-mass guests. Particularly suitable for this kind of study are s-PS/CO 2 clathrate films.…”

Section: Diffusion Mechanisms In the D Crystalline Phasementioning

confidence: 99%

Understanding at molecular level of nanoporous and co-crystalline materials based on syndiotactic polystyrene

Milano

Guerra

2009

Progress in Materials Science

Self Cite

View full text Add to dashboard Cite

“…Rizzo et al . reported crystalline orientation in sPS cast films prepared from sPS solutions in some organic solvents . The orientation originates from evaporation of the solvents during the crystallization.…”

Section: Resultsmentioning

confidence: 99%

Crystalline structure and phase transition of syndiotactic styrene‐based copolymers

Naga

Sakurai

Hashimoto

et al. 2018

Polymer International

View full text Add to dashboard Cite

Crystalline structure and phase transition of clathrate phase of syndiotactic poly[styrene‐co‐(p‐R‐styrene)] (St/RSt; R = CH3 (Me), tert‐butyl (Bu), HO), prepared from solutions, have been investigated with wide‐angle X‐ray diffraction (WAXD) and differential scanning calorimetry. The copolymers containing less than 67.2 mol% of MeSt or 9.4 mol% of BuSt formed δ phase crystallized from toluene solution. The Bragg distance of 010 and 2true‾10 reflections of the St/MeSt copolymer slightly increased with increasing of the MeSt content over 10 mol%. The St/HOSt copolymer containing 16.1 mol% of HOSt crystallized from dioxane solution also formed δ phase crystal. The orientation of the crystalline phase of the copolymers in films, which were prepared by cast‐crystallization from o‐xylene or dioxane solution, was evaluated using WAXD. The degrees of orientation were almost independent of RSt content in the copolymers. Phase transition from the δ phase crystal to the α or γ phase crystal of the copolymers in the heating process was observed using WAXD. The copolymers containing less than 14.8 mol% of MeSt or 8.4 mol% of BuSt showed a transition from the δ phase to the γ phase at more than 150 °C. Crystallinity of St/BuSt in the γ phase was lower than that in the δ phase. © 2018 Society of Chemical Industry

show abstract

“…These investigations have been performed mainly by using FTIR measurements combined with gravimetric measurements and have been conducted on volatile organic compounds (VOC) like 1,2-dichloroethane (DCE) [67] as well as on gases like carbon dioxide [68] and ethylene [69]. …”

Section: Mass Transport and Sorption Thermodynamics Of Low Molecular mentioning

confidence: 99%

Molecular Sensing by Nanoporous Crystalline Polymers

Pilla

Cusano

Cutolo

et al. 2009

Sensors

Self Cite

View full text Add to dashboard Cite

Chemical sensors are generally based on the integration of suitable sensitive layers and transducing mechanisms. Although inorganic porous materials can be effective, there is significant interest in the use of polymeric materials because of their easy fabrication process, lower costs and mechanical flexibility. However, porous polymeric absorbents are generally amorphous and hence present poor molecular selectivity and undesired changes of mechanical properties as a consequence of large analyte uptake. In this contribution the structure, properties and some possible applications of sensing polymeric films based on nanoporous crystalline phases, which exhibit all identical nanopores, will be reviewed. The main advantages of crystalline nanoporous polymeric materials with respect to their amorphous counterparts are, besides a higher selectivity, the ability to maintain their physical state as well as geometry, even after large guest uptake (up to 10–15 wt%), and the possibility to control guest diffusivity by controlling the orientation of the host polymeric crystalline phase. The final section of the review also describes the ability of suitable polymeric films to act as chirality sensors, i.e., to sense and memorize the presence of non-racemic volatile organic compounds.

show abstract

Anisotropic Guest Diffusion in the δ Crystalline Host Phase of Syndiotactic Polystyrene: Transport Kinetics in Films with Three Different Uniplanar Orientations of the Host Phase

Cited by 66 publications

References 44 publications

Understanding at molecular level of nanoporous and co-crystalline materials based on syndiotactic polystyrene

Understanding at molecular level of nanoporous and co-crystalline materials based on syndiotactic polystyrene

Crystalline structure and phase transition of syndiotactic styrene‐based copolymers

Molecular Sensing by Nanoporous Crystalline Polymers

Contact Info

Product

Resources

About