Zobrazeno 1 - 5
of 5
pro vyhledávání: '"Patrick S. T. Loi"'
Publikováno v:
Journal of Applied Polymer Science. 41:1095-1114
A large number of polypropylene samples, of isotacticities spanning the range 0.35 to 1.00 mm, have been examined by differential scanning calorimetry (DSC) in order to establish a calorimetric index for determining stereostructure. Crystallization s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::497245e67b336cd8c1c023f2b8fca3c1
https://doi.org/10.1002/app.1990.070410519
https://doi.org/10.1002/app.1990.070410519
8. Active Center Determination in Ziegler-Natta Polymerization: an Innovative Dual-Labeling Approach
Widely used radiotracer methods for active center determination, employing 14 CO tags and tritiated alcohol quench, generally provide conflicting results, thus casting doubt on the validity of both methods. This paper seeks to harmonize the apparent
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd66192167ef2c3ec822467929ececc2
https://doi.org/10.1016/s0167-2991(08)63024-4
https://doi.org/10.1016/s0167-2991(08)63024-4
Publikováno v:
British Polymer Journal. 21:77-80
A method is proposed for the determination of low levels of moisture in rubbers and other soluble polymers. The material for analysis is dissolved in an appropriate solvent and triethylaluminium is added to react with the water contained in the sampl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e5a4c739c71201bde6a5e56fab8b7536
https://doi.org/10.1002/pi.4980210113
https://doi.org/10.1002/pi.4980210113
Autor:
Patrick S. T. Loi, David R. Burfield
Publikováno v:
Journal of Applied Polymer Science. 36:279-293
This study examines the application of infrared (IR) spectrometry to the determination of polypropylene (PP) stereoregularity. The use of the absorption bands at 998 cm−1 and 841 cm−1 as indices of isotacticity and bands at 1167 cm−1 and 973 cm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c342691ec970cf93b4b6f1015fe78017
https://doi.org/10.1002/app.1988.070360203
https://doi.org/10.1002/app.1988.070360203
Autor:
David R. Burfield, Patrick S. T. Loi
The determination of polypropylene isotacticity is still of importance today in the evaluation of commercial catalysts and in the search for detailed mechanistic understanding of the stereoregulating process. Whereas, methods based on NMR measurement
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::803c1090e427d60a73d44cb4d27be2a2
https://doi.org/10.1016/s0167-2991(09)60338-4
https://doi.org/10.1016/s0167-2991(09)60338-4