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Bottlebrush Amphiphilic Polymer Co-Networks
Macromolecules ( IF 5.1 ) Pub Date : 2022-06-08 , DOI: 10.1021/acs.macromol.2c00449
Brandon R Clarke 1 , Gregory N Tew 1
Affiliation  

We report the synthesis of novel poly(ethylene glycol) and poly(dimethyl siloxane) (PEG and PDMS, respectively) bottlebrush amphiphilic polymer co-networks (B-APCNs) with high gel fractions by a grafting-through ring-opening metathesis polymerization. By varying the volume fraction of PEG (ϕPEG), we alter the crystallinity of the networks, achieving complete suppression of PEG crystallinity at ϕPEG = 0.35. Furthermore, we show that the crystallinity of these networks can be tuned to alter their moduli. Through dynamic mechanical analysis, we show that the storage and loss moduli of networks with completely suppressed crystallinity (ϕPEG = 0.35) behave similarly to a PDMS homopolymer bottlebrush network. These bottlebrush networks represent an unexplored architecture for the field of amphiphilic polymer co-networks.

中文翻译:

Bottlebrush 两亲聚合物共网络

我们报道了通过开环复分解聚合接枝合成具有高凝胶分数的新型聚乙二醇和聚二甲基硅氧烷(分别为 PEG 和 PDMS)瓶刷两亲聚合物共网络(B-APCN)。通过改变 PEG 的体积分数 (Φ PEG ),我们改变了网络的结晶度,在 Φ PEG = 0.35 时实现了 PEG 结晶度的完全抑制。此外,我们表明可以调整这些网络的结晶度来改变它们的模量。通过动态力学分析,我们表明,完全抑制结晶度(φ PEG = 0.35)的网络的存储和损耗模量的行为与 PDMS 均聚物洗瓶刷网络类似。这些瓶刷网络代表了两亲聚合物共网络领域的一种未经探索的架构。
更新日期:2022-06-08
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