scholarly journals Formation of cyclic structures in the cationic ring-opening polymerization of 1,3-dioxolane

RSC Advances ◽  
2020 ◽  
Vol 10 (16) ◽  
pp. 9623-9632
Author(s):  
Anna M. J. Coenen ◽  
Jules A. W. Harings ◽  
Samaneh Ghazanfari ◽  
Stefan Jockenhoevel ◽  
Katrien V. Bernaerts
Keyword(s):  
Ring Opening ◽  
Gel Permeation Chromatography ◽  
Laser Desorption ◽  
Ring Opening Polymerization ◽  
Laser Desorption Ionization ◽  
Ionization Time ◽  
Flight Mass Spectrometry ◽  
Gel Permeation ◽  
Cationic Ring Opening Polymerization ◽  
Matrix Assisted Laser

Elucidating the mechanism of the cationic ring-opening polymerization of dioxolane using gel permeation chromatography, matrix assisted laser desorption/ionization time of flight mass spectrometry and 31P NMR.

scholarly journals MALDI-TOF masa espektrometriaren erabilera polimeroak ezaugarritzeko

2019 ◽  
pp. 185-196
Author(s):  
Antonio Veloso ◽  
Rebeca Sola-Llano
Keyword(s):  
Gel Permeation Chromatography ◽  
Laser Desorption ◽  
Laser Desorption Ionization ◽  
Ionization Time ◽  
Maldi Tof ◽  
Flight Mass Spectrometry ◽  
Gel Permeation ◽  
Tof Ms ◽  
Matrix Assisted Laser ◽  
Matrix Assisted Laser Desorption

Gaur egun, materialak ezaugarritzekoerabiltzen diren teknikek informazio dezente uzten dute agerian, baina oraindik nahiko zaila da egiturari buruzko informazio osatua lortzea. Informazio hau garrantzi handikoa eta beharrezkoa da modu sakon batean polimero horietatik eratorritako materialen propietateak ezagutzeko. Polimeroak karakterizatzeko, Matrix Assisted Laser Desorption-Ionization Time of Flight Mass Spectrometry (MALDI/TOF MS) sortu zenetik, gero eta gehiago hedatu da teknika honen erabilera arlo desberdinetan.Masa-espektrometria teknika hau hedatu egin da polimeroen karakterizazioan, masa molarraren banaketaz gain, polimeroen unitate monomerikoa, polisakabanatzea eta kateen muturrak ezagutzea lor daitekeelako, hain zuzen ere.Lan honetan MALDI/TOF teknikaren oinarriak labur azalduko dira: masa espektrometroak nola funtzionatzen duen, zein den matrizearen garrantzia, zeintzuk diren matrize ohikoenak... Eta zenbait polimeroren karakterizazio adibideak aztertuko dira. Zehazki, bi karakterizazio-prozedura erakutsiko dira: Gel Permeation Chromatography (GPC) teknikan estandartzat erabiltzen den poliestireno homopolimeroa eta Latemul, emultsionatzaile polimerizagarri komertzial moduan erabiltzen den kopolimeroa.

Synthesis and characterization of 4- and 6-arm star-shaped poly(ε-caprolactone)s

e-Polymers ◽  
2005 ◽  
Vol 5 (1) ◽  
Author(s):  
Michael A. R. Meier ◽  
Ulrich S. Schubert
Keyword(s):  
Ring Opening ◽  
Analytical Techniques ◽  
Gel Permeation Chromatography ◽  
Laser Desorption ◽  
Ring Opening Polymerization ◽  
Molecular Weights ◽  
H Nmr ◽  
Flight Mass Spectrometry ◽  
Gel Permeation

AbstractStar-shaped poly(ε-caprolactone) (PCL) polymers were synthesized and fully characterized by gel permeation chromatography, matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry (MALDI-TOF MS) as well as 1H NMR spectroscopy. First a series of four-armed PCLs with different molecular weights was prepared and analyzed with the mentioned analytical techniques revealing that the applied ring-opening polymerization was controlled and defined star-shaped polymers could be synthesized. Subsequently, also the synthesis of six-armed PCL polymers was investigated with the conclusion that also these starshaped polymers could be prepared in a controlled fashion.

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