Biomimetic synthetic rubber and methods for controlling its physical properties through backbone double bond stereochemistry by monomer selection and end group modification
申请人:Becker Matthew L.
公开号:US10968303B2
公开(公告)日:2021-04-06
In various embodiments, the present invention provides a strong, synthetic elastomer materials (and related methods for making same) with mechanical properties that are controlled by the stereochemically-defined double bonds within their backbone, yet have physical properties that are derived from monomer selection and defined, modifiable, chain end groups. The use of the organocatalyzed, stereospecific addition of thiols to activated alkynes, affords isolated high molar mass materials (>100 kDa) via step-growth polymerization with high levels of cis- or trans-double bond content. Furthermore, in various aspects of the present invention, it has been found that changing the monomer composition and chain end groups provides additional control over the materials' physical properties to provide more efficient compounding with polar additives. Using this approach to elastomer synthesis, further end group modification and toughening through various vulcanization strategies are also possible.
BIOMIMETIC SYNTHETIC RUBBER AND METHODS FOR CONTROLLING ITS PHYSICAL PROPERTIES THROUGH BACKBONE DOUBLE BOND STEREOCHEMISTRY
申请人:The University of Akron
公开号:EP3341422B1
公开(公告)日:2021-11-03
[EN] BIOMIMETIC SYNTHETIC RUBBER AND METHODS FOR CONTROLLING ITS PHYSICAL PROPERTIES THROUGH BACKBONE DOUBLE BOND STEREOCHEMISTRY<br/>[FR] CAOUTCHOUC SYNTHÉTIQUE BIOMIMÉTIQUE ET PROCÉDÉS POUR CONTRÔLER SES PROPRIÉTÉS PHYSIQUES AU MOYEN D'UNE STÉRÉOCHIMIE À LIAISONS DOUBLES À L'INTÉRIEUR DU SQUELETTE
申请人:BECKER MATTHEW L
公开号:WO2017040373A1
公开(公告)日:2017-03-09
In various embodiments, the present invention provides a strong, synthetic elastomer materials (and related methods for making same) with mechanical properties that are controlled by the stereochemically-defined double bonds within their backbone, yet have physical properties that are derived from monomer selection and defined, modifiable, chain end groups. The use of the organocatalyzed, stereospecific addition of thiols to activated alkynes, affords isolated high molar mass materials (>100 kDa) via step-growth polymerization with high levels of cis- or trans- double bond content. Furthermore, in various aspects of the present invention, it has been found that changing the monomer composition and chain end groups provides additional control over the materials' physical properties to provide more efficient compounding with polar additives. Using this approach to elastomer synthesis, further end group modification and toughening through various vulcanization strategies are also possible.
Independent Control of Elastomer Properties through Stereocontrolled Synthesis
作者:Craig A. Bell、Jiayi Yu、Ian A. Barker、Vinh X. Truong、Zhen Cao、Andrey V. Dobrinyin、Matthew L. Becker、Andrew P. Dove
DOI:10.1002/anie.201606750
日期:2016.10.10
alteration of its mechanical performance. Using organocatalyzed stereospecific additions of thiols to activated alkynes, high‐molar‐mass elastomers were isolated via step‐growth polymerization. The resulting controllable double‐bond stereochemistry defines the crystallinity and the concomitant mechanical properties as well as enabling the synthesis of materials that retain their excellent mechanical properties