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Atom transfer radic...
Atom transfer radical polymerization of methyl acrylate from a multifunctional initiator at ambient temperature
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- Carlmark, Anna E (författare)
- KTH,Fiber- och polymerteknologi
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- Vestberg, Robert (författare)
- KTH,Fiber- och polymerteknologi
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- Malmström Jonsson, Eva (författare)
- KTH,Fiber- och polymerteknologi
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(creator_code:org_t)
- OXFORD, ENGLAND : ELSEVIER SCI LTD, 2002
- 2002
- Engelska.
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Ingår i: Polymer. - OXFORD, ENGLAND : ELSEVIER SCI LTD. - 0032-3861 .- 1873-2291. ; 43:15, s. 4237-4242
- Relaterad länk:
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https://urn.kb.se/re...
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visa fler...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- A multifunctional initiator for ATRP has been synthesized by reacting a hyperbranched polyether, based on 3-ethyl-3-(hydroxymethyl)oxetane, with 2-bromo-isobutyrylbromide. The macroinitiator contained approximately 25 initiating sites per molecule. It was used for the atom transfer radical polymerization of methyl acrylate mediated by Cu(I)Br and tris(2-(dimethylamino)ethyl)amine (Me-6-TREN) in ethyl acetate at room temperature. This yielded a co-polymer with a dendritic-linear architecture. The large number of growing chains from each macromolecule increases the probability of inter-and intramolecular reactions. In order to control these kinds of polymerizing systems and prevent them from forming a gel, the concentration of propagating radicals must be kept low. The polymerizations under these conditions were well controlled. When a ratio of initiating sites-to-catalyst of 1:0.05 was used, the polymers from all of the reactions had a low polydispersity, ranging from 1.1 to 1.4. None of the polymerizations under these conditions gave gelation. Monomer conversions as high as 65% were reached while maintaining control over the polymerization. (C) 2002 Elsevier Science Ltd. All rights reserved.
Ämnesord
- NATURVETENSKAP -- Kemi -- Polymerkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Polymer Chemistry (hsv//eng)
Nyckelord
- atom transfer radical polymerization
- 'living'/controlled radical polymerization
- multifunctional initiator
- RING-OPENING POLYMERIZATION
- STAR POLYMERS
- METHACRYLATE
- POLYESTERS
- POLYSTYRENE
- COPOLYMERS
- COMPLEXES
- SYSTEM
- BLOCK
- Polymer chemistry
- Polymerkemi
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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