Hyperbranched Silicone MDTQ Tack Promoters
Low molecular weight, highly crosslinked silicone resins are widely used as reinforcing agents for highly transparent elastomers and adhesion/tack promoters in gels. The resins are complex mixtures and their structure / property relationships are ill defined. We report the synthesis of a library of...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2019-11-01
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| Series: | Molecules |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1420-3049/24/22/4133 |
| _version_ | 1818553700266803200 |
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| author | Sijia Zheng Shuai Liang Yang Chen Michael A. Brook |
| author_facet | Sijia Zheng Shuai Liang Yang Chen Michael A. Brook |
| author_sort | Sijia Zheng |
| collection | DOAJ |
| description | Low molecular weight, highly crosslinked silicone resins are widely used as reinforcing agents for highly transparent elastomers and adhesion/tack promoters in gels. The resins are complex mixtures and their structure / property relationships are ill defined. We report the synthesis of a library of 2, 3 and 4-fold hyperbranched polymeric oils that are comprised of linear, lightly branched or highly branched dendronic structures. Rheological examination of the fluids and tack measurements of gels filled with 10, 25 or 50% dendronic oils were made. Viscosity of the hyperbranched oils themselves was related to molecular weight, but more significantly to branch density. The properties are driven by chain entanglement. When cured into a silicone gel, less densely branched materials were more effective in improving tack than either linear oils or Me<sub>3</sub>SiO-rich, very highly branched oils of comparable molecular weight, because the latter oils underwent phase separation. |
| first_indexed | 2024-12-12T09:29:15Z |
| format | Article |
| id | doaj.art-8f7c50be19cd4341b69f4d46fa6f8655 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-12-12T09:29:15Z |
| publishDate | 2019-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-8f7c50be19cd4341b69f4d46fa6f86552022-12-22T00:28:56ZengMDPI AGMolecules1420-30492019-11-012422413310.3390/molecules24224133molecules24224133Hyperbranched Silicone MDTQ Tack PromotersSijia Zheng0Shuai Liang1Yang Chen2Michael A. Brook3Department of Chemistry and Chemical Biology, McMaster University, 1280 Main St. W., Hamilton, ON L8S 4M1, CanadaDepartment of Chemistry and Chemical Biology, McMaster University, 1280 Main St. W., Hamilton, ON L8S 4M1, CanadaDepartment of Chemistry and Chemical Biology, McMaster University, 1280 Main St. W., Hamilton, ON L8S 4M1, CanadaDepartment of Chemistry and Chemical Biology, McMaster University, 1280 Main St. W., Hamilton, ON L8S 4M1, CanadaLow molecular weight, highly crosslinked silicone resins are widely used as reinforcing agents for highly transparent elastomers and adhesion/tack promoters in gels. The resins are complex mixtures and their structure / property relationships are ill defined. We report the synthesis of a library of 2, 3 and 4-fold hyperbranched polymeric oils that are comprised of linear, lightly branched or highly branched dendronic structures. Rheological examination of the fluids and tack measurements of gels filled with 10, 25 or 50% dendronic oils were made. Viscosity of the hyperbranched oils themselves was related to molecular weight, but more significantly to branch density. The properties are driven by chain entanglement. When cured into a silicone gel, less densely branched materials were more effective in improving tack than either linear oils or Me<sub>3</sub>SiO-rich, very highly branched oils of comparable molecular weight, because the latter oils underwent phase separation.https://www.mdpi.com/1420-3049/24/22/4133silicone dendrimerprecise mdtq resinstacky silicone gelsplasticization vs. swellingbranched v linear fluids |
| spellingShingle | Sijia Zheng Shuai Liang Yang Chen Michael A. Brook Hyperbranched Silicone MDTQ Tack Promoters Molecules silicone dendrimer precise mdtq resins tacky silicone gels plasticization vs. swelling branched v linear fluids |
| title | Hyperbranched Silicone MDTQ Tack Promoters |
| title_full | Hyperbranched Silicone MDTQ Tack Promoters |
| title_fullStr | Hyperbranched Silicone MDTQ Tack Promoters |
| title_full_unstemmed | Hyperbranched Silicone MDTQ Tack Promoters |
| title_short | Hyperbranched Silicone MDTQ Tack Promoters |
| title_sort | hyperbranched silicone mdtq tack promoters |
| topic | silicone dendrimer precise mdtq resins tacky silicone gels plasticization vs. swelling branched v linear fluids |
| url | https://www.mdpi.com/1420-3049/24/22/4133 |
| work_keys_str_mv | AT sijiazheng hyperbranchedsiliconemdtqtackpromoters AT shuailiang hyperbranchedsiliconemdtqtackpromoters AT yangchen hyperbranchedsiliconemdtqtackpromoters AT michaelabrook hyperbranchedsiliconemdtqtackpromoters |