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Heterotelechelic Silicones: Facile Synthesis and Functionalization Using Silane-Based Initiators.

التفاصيل البيبلوغرافية
العنوان: Heterotelechelic Silicones: Facile Synthesis and Functionalization Using Silane-Based Initiators.
المؤلفون: Okayama Y; Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States., Eom T; Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States., Czuczola M; Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, United States., Abdilla A; Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, United States., Blankenship JR; Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States.; Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, United States., Albanese KR; Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States.; Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, United States., de Alaniz JR; Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, United States., Bates CM; Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States.; Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, United States.; Materials Department, University of California, Santa Barbara, California 93106, United States.; Department of Chemical Engineering, University of California, Santa Barbara, California 93106, United States., Hawker CJ; Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States.; Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, United States.; Materials Department, University of California, Santa Barbara, California 93106, United States.
المصدر: Macromolecules [Macromolecules] 2023 Oct 29; Vol. 56 (21), pp. 8806-8812. Date of Electronic Publication: 2023 Oct 29 (Print Publication: 2023).
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: American Chemical Society Country of Publication: United States NLM ID: 0365316 Publication Model: eCollection Cited Medium: Print ISSN: 0024-9297 (Print) Linking ISSN: 00249297 NLM ISO Abbreviation: Macromolecules Subsets: PubMed not MEDLINE
أسماء مطبوعة: Original Publication: Washington, American Chemical Society.
مستخلص: The synthetic utility of heterotelechelic polydimethylsiloxane (PDMS) derivatives is limited due to challenges in preparing materials with high chain-end fidelity. In this study, anionic ring-opening polymerization (AROP) of hexamethylcyclotrisiloxane (D 3 ) monomers using a specifically designed silyl hydride (Si-H)-based initiator provides a versatile approach toward a library of heterotelechelic PDMS polymers. A novel initiator, where the Si-H terminal group is connected to a C atom (H-Si-C) and not an O atom (H-Si-O) as in traditional systems, suppresses intermolecular transfer of the Si-H group, leading to heterotelechelic PDMS derivatives with a high degree of control over chain ends. In situ termination of the D 3 propagating chain end with commercially available chlorosilanes (alkyl chlorides, methacrylates, and norbornenes) yields an array of chain-end-functionalized PDMS derivatives. This diversity can be further increased by hydrosilylation with functionalized alkenes (alcohols, esters, and epoxides) to generate a library of heterotelechelic PDMS polymers. Due to the living nature of ring-opening polymerization and efficient initiation, narrow-dispersity ( Đ < 1.2) polymers spanning a wide range of molar masses (2-11 kg mol -1 ) were synthesized. With facile access to α-Si-H and ω-norbornene functionalized PDMS macromonomers (H-PDMS-Nb), the synthesis of well-defined supersoft ( G ' = 30 kPa) PDMS bottlebrush networks, which are difficult to prepare using established strategies, was demonstrated.
Competing Interests: The authors declare no competing financial interest.
(© 2023 The Authors. Published by American Chemical Society.)
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سلسلة جزيئية: Dryad 10.5061/dryad.cjsxksncm
تواريخ الأحداث: Date Created: 20231129 Latest Revision: 20231201
رمز التحديث: 20231201
مُعرف محوري في PubMed: PMC10653272
DOI: 10.1021/acs.macromol.3c01802
PMID: 38024157
قاعدة البيانات: MEDLINE
الوصف
تدمد:0024-9297
DOI:10.1021/acs.macromol.3c01802