As a result, both head and tail are localized at external atoms of the reaction site. We refer to this connection type as a tail-tail. In case 2, the head and tail are localized at internal and external carbon positions, respectively. We refer to this connection type as head-tail. ...
Interestingly enough, these same dialkyls can be activated for ethylene polymerization through reaction with either H2 or silanes [57b]. Trinuclear hydride complexes [{(APy)Y}3(μ2-H)3(μ3-H)2(CH2SiMe3)(THF)2] are thought to be the active species in this case. Most of the synthetic ...
It has the advantage of being able to simultaneously attain both high molecular weight and high reaction rates. Disadvantages of emulsion polymerization: 1. Large number of ingredients are often needed. 2. It is difficult to remove the residues from the polymer; hence impurity levels are rather ...
5xFAD mouse pups at postnatal day 1–2 were genotyped using primer probes and real-time polymerase chain reaction analysis of 1-mm tail snip samples. Brains from the mouse pups were then rapidly removed, cerebral cortices were isolated using a sterile razor blade, and tissue samples from multip...
methodeliminatestheneedforanywork-upofthereaction mixture.Oneofthemoststrikingpropertiesobservedinsuch polymersisthattheresultingpolymericprodrugsareofvery lowheterogeneity(narrowmolecularweightdistribution) representedby ¯ M w / ¯ M n ,( ¯
The reaction is carried out usually at a temperature of −50 to 250° C., and preferably 0 to 150° C., usually for 1 to 10 hours under a pressure usually from atmospheric pressure to 300 kg/cm2-G. The granulation method of the invention can be in particular preferably applied to ...
Fish proteins can form a gel after a setting period in the range 0–40°C. The most appropriate temperature for adding MTGase and reaction time depends on the fish type and whether they inhabit cold or warm water (Ramírez et al., 2000). For example, the ideal conditions for treating min...
A polymerization reaction was carried out as set forth above for Example 1 except Boroester Initiator 5 was mixed in at 1% into Pedigree® 600 Styrene. The data is summarized in Table 4 below. Excellent reactivity, low weight loss on curing and extended shelf-life was observed with the pre...
propylene and butylene. The selectivity of the catalyst of the present invention is exceptional for this type of reaction, while the activity is high as well, resulting in greater efficiency in producing such codimers. In the prior art, such codimers are produced in rather minor amounts as an...
Suitable non-polar solvents for slurrying silica and introduction of the first transition metal component are materials which are liquid at reaction temperatures and in which all of the reactants used herein, i.e., the organomagnesium compound, the alcohol and the transition metal compound, are ...