Melt polymerization facilitated the synthesis of semi-saturated copolyesters composed of an aromatic diester (dimethyl terephthalate - DMT) with various ratios of two saturated diols, [1,1’-bi(cyclohexane)]-3,4’-diyldimethanol (3,4’ BCD) and [1,1’-bi(cyclohexane)]-4,4’-diyldimethanol (4,4’ BCD). Proton nuclear magnetic spectroscopy (<sup>1</sup>H NMR) confirmed successful incorporation of all monomers into polymer backbone. Compression molding provided optically clear films suggesting absence of crystallinity in these polymers.  The semi-saturated copolyesters exhibited high thermal stabilities as evidenced by an onset of 5 wt% loss temperatures above 350 °C according to thermogravimetric analysis (TGA). Dynamic mechanical analysis (DMA) revealed glass transition temperatures &gt; 109 °C for all compositions and sub-Tg β-relaxations with similar intensities suggesting that the unsaturated rings play a key role in energy absorption at low temperatures. <br/>

Structure-property relationships of semi-saturated copolyesters

Macromolecular Chemistry: The Second Century

[Author Benefits](https://scimeetings.acs.org/?utm_source=pubs_content_marketing&utm_medium=website&utm_campaign=0320_MCF_NPI_Launch_Spring_Homepage&ref=pubs_content_marketing)

[How to use SciMeetings](https://storage.googleapis.com/dl.morressier.com/acs/SciMeetings-ACSSpring2020-HowToGuide_M3020-Final.pdf)

[Frequently Asked Questions](https://storage.googleapis.com/dl.morressier.com/acs/SciMtng_ACSNMSp2020_FAQ_M3120_Final.pdf)

ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.