All Journals. New Titles. Pick and Choose. Literature Updates. For Members.
1. CROSS REFERENCE TO RELATED APPLICATIONS
For Librarians. RSS Feeds. Chemistry World. Education in Chemistry. Open Access. Historical Collection.
From the journal: Chemical Society Reviews. Post-polymerization functionalization of polyolefins. Nicole K. You have access to this article.
- Survival or Revival: Ten Keys to Church Vitality!
- Properties of our functional polyolefins.
- Functionalization of polyolefins in the melt?
- Be Realistic: Demand the Impossible.
- Servicios Personalizados?
- Live Again.
- The Liberation of Alice Love;
Figure 1. Hillmyer and Hartwig et al. Results and Discussion. We have recently developed a copper-based catalytic system for the functionalization of alkanes through insertion of CHCO2Et into C—H bonds using commercial ethyl diazoacetate EDA as the carbene source. The polymerization of transbutene with a-di-imine Ni II catalysts11 provides a high molecular weight polyolefin with a well-defined structure corresponding to a linear polyethylene with a methyl branch on every third carbon atom precisely Scheme 1.
We have carried out the room temperature reaction of ethyl diazoacetate and the poly 2-butene 12 in the presence of catalytic amounts of TpBr3Cu NCMe Scheme 1. Table 1.
Mw and Mn values x 10 3 g mol. Figure 1 shows the 1H NMR spectrum of the functionalized polymer. The degree of incorporation determined by NMR was ca. A significant feature of this methodology was revealed by GPC of the functionalized materials Table 1, entries 1—3. Note that molecular weights are apparent molecular weights relative to linear polyethylene standards; i. As shown in Figure 1, the 1H NMR spectrum13 of the modified polymer displays again the resonances attributable to — CH2—CO2Et groups with similar patterns to those observed in the functionalization of smaller alkanes.
The existence of a large. Figure 2.
- Functional polyolefins - gyluxavu.tk.
- 1st Edition?
- 1st Edition.
- Win-Win Negotiation Techniques : Develop the mindset, skills and behaviours of win-win negotiators (ST Training Solutions: Success Skills).
- Vinyl ether end-functionalized polyolefins - The University of Southern Mississippi.
- "Controlled functionalization of crystalline polyolefins and their appl" by Jihoon Shin.
This could also account for the observed increase in the degree of ester group incorporation in terms of the number of carboxylates per C , as inferred from the data in entries 3 and 9 in Table 1. These results are in good agreement with the observed regioselectivity in the case of 2-methylbu-tane and 2-methylpentane.
Since control of the degree of ester incorporation is desirable due to its relationship to polymer properties, we have performed a series of experiments where we have modified the following variables: i EDA addition time, ii catalyst loading, and iii polymer:EDA ratio Table 1, entries 4— Although each of them exerts a certain degree of influence in the number of :CHCO Figure 3. Left: polymer repeat units:EDA Right: polymer repeat units:EDA , incorporation: 2. If you are the author of this article you still need to obtain permission to reproduce the whole article in a third party publication with the exception of reproduction of the whole article in a thesis or dissertation.
Information about reproducing material from RSC articles with different licences is available on our Permission Requests page. Fetching data from CrossRef. This may take some time to load. Jump to main content. Jump to site search.
Post-polymerization functionalization of polyolefins - Chemical Society Reviews (RSC Publishing)
Journals Books Databases. Search Advanced. Current Journals. Archive Journals. All Journals. New Titles. Pick and Choose. Literature Updates. For Members. For Librarians. RSS Feeds. Chemistry World.