𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Multiphase-Separated Polyurethanes Studied by Micro-Raman Spectroscopy

✍ Scribed by Helena Janik; Barbara Pałys; Zoran S. Petrovic

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
116 KB
Volume
24
Category
Article
ISSN
1022-1336

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Micro‐Raman spectroscopy has been used to investigate the chemical micro‐heterogeneity of multiphase‐separated poly(ether urethanes) (PETU). Analysis of PETU cross‐sections by means of micro‐Raman spectroscopy revealed the nearly complete absence of soft segments in AI aggregates (called globules). These aggregates are in the order of a few micrometers in size. The composition of the matrix and the AII aggregates (spherulites) was comparable.

Example of an AFM image (sample 706, scan size 25 μm, converted to monochromatic image).

magnified imageExample of an AFM image (sample 706, scan size 25 μm, converted to monochromatic image).

📜 SIMILAR VOLUMES

Prehistoric Anasazi ceramics studied by
Prehistoric Anasazi ceramics studied by micro-Raman spectroscopy
✍ Jana Striova; Cristiana Lofrumento; Angela Zoppi; Emilio Mario Castellucci 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 207 KB

## Abstract In this project, micro‐Raman (µ‐Raman) spectroscopy has been used as a means to investigate the pigments employed in decoration of Anasazi pottery. Analysis of Raman spectra revealed the presence of organic‐ (amorphous carbon), iron‐ and/or manganese‐based pigments in line with the know

Photodegradation of CdSe Quantum Dots St
Photodegradation of CdSe Quantum Dots Studied by Micro-Photoluminescence Spectroscopy
✍ T. Ota; K. Maehashi; H. Nakashima; K. Oto; K. Murase 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 75 KB

The photodegradation of CdSe quantum dots (QDs) is investigated by micro-photoluminescence (PL) measurements. With increasing exposure time of laser, the PL intensity of the QDs gradually decreases up to %25 s and remains constant after % 25 s. In contrast, the PL intensity of ZnCdSe quantum well (Q