The short chain branching of low molecular weight polyethylene crystallized from solution

1969 ◽  
Vol 229 (1) ◽  
pp. 21-23 ◽  
Author(s):  
F. J. Baltá Calleja ◽  
A. Hidalgo
Keyword(s):  
Molecular Weight ◽  
Short Chain ◽  
Low Molecular Weight ◽  
Chain Branching

scholarly journals A study of the application of graphite MALDI to the analysis of short-chain polyethylene glycols

2021 ◽  
Author(s):  
Ulric Conway ◽  
Alexander D. Warren ◽  
Christopher J. Arthur ◽  
Paul J. Gates
Keyword(s):  
Molecular Weight ◽  
Lithium Chloride ◽  
Maldi Ms ◽  
Short Chain ◽  
Polyethylene Glycols ◽  
Low Molecular Weight ◽  
Colloidal Graphite ◽  
Graphite Matrix ◽  
Successful Analysis

MALDI-MS using colloidal graphite matrix doped with lithium chloride for the successful analysis of low molecular weight polymers.

Lateral habits of single crystals of metallocene-catalyzed low molecular weight short chain branched polyethylene from the melt

Polymer ◽  
2000 ◽  
Vol 41 (24) ◽  
pp. 8573-8577 ◽  
Author(s):  
Jieping Liu ◽  
Fengchao Xie ◽  
Binyang Du ◽  
Fajun Zhang ◽  
Qiang Fu ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Single Crystals ◽  
Short Chain ◽  
Low Molecular Weight ◽  
Branched Polyethylene

Glass Transition Behavior of Polyisoprene: The Influence of Molecular Weight, Terminal Hydroxy Groups, Microstructure, and Chain Branching

1982 ◽  
Vol 55 (1) ◽  
pp. 245-252 ◽  
Author(s):  
C. Kow ◽  
M. Morton ◽  
L. J. Fetters ◽  
N. Hadjichristidis
Keyword(s):  
Molecular Weight ◽  
Differential Scanning Calorimetry ◽  
Glass Transition ◽  
Low Molecular Weight ◽  
Hydroxyl Groups ◽  
Transition Temperatures ◽  
Scanning Calorimetry ◽  
Chain Branching ◽  
Glass Transition Temperatures ◽  
Hydroxy Groups

Abstract The glass transition temperatures for a series of high-1,4 linear and star-branched polyisoprenes have been measured by differential scanning calorimetry. The Fox-Flory relation for the linear polyisoprenes was found to be Tg=Tg∞−1.76×104Mn−1. The influence of hydroxyl groups on Tg was also examined for low molecular weight (<2.2×104) polyisoprenes.

Relationship between triglyceride structure and softening point of milk fat

1981 ◽  
Vol 48 (1) ◽  
pp. 131-138 ◽  
Author(s):  
Peter W. Parodi
Keyword(s):  
Fatty Acids ◽  
Molecular Weight ◽  
High Molecular Weight ◽  
Chain Length ◽  
Molecular Species ◽  
Milk Fat ◽  
Softening Point ◽  
Short Chain ◽  
Low Molecular Weight ◽  
Short Chain Length

SummaryEight samples of milk fat were selected for softening point (SP) range. They were separated into high, medium and low molecular weight triglyceride fractions by silicic acid-column chromatography to enable further separation into triglyceride classes by silver ion adsorption thin-layer chromatography. Correlation between triglyceride class content and SP was low. The molecular species composition of the triglyceride classes was determined and correlated with SP. The best correlations were between SP and some low and some high molecular weight triglycerides of the total fat and the trisaturated (SSS) triglyceride class. Correlation coefficients were determined between SP and mole percentage of individual fatty acids and groups of acids. The highest correlations were between SP and individual short chain-length fatty acids (C4–C10) and groupings of short chain-length acids (C4–C10) and groupings of long chain-length acids (C16–C20). The triglyceride class composition of a sample of milk fat was determined before and after interesterification. Interesterification increased the SP from 31·6 to 36·3 °C and produced increased amounts of both low and high and decreased amounts of medium molecular weight triglyceride molecular species in all triglyceride classes. The increases in the amounts of high molecular weight triglycerides were several times greater than the increase in the amounts of low molecular weight triglycerides.

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