Journal
POLYMERS
Volume 11, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/polym11020373
Keywords
bi-functional POSS; hydrophobic modification; thermoplastic polyurethane; mechanical performance
Categories
Funding
- National Natural Science Foundation of China [51702178]
- International Cooperation Research Special Fund Project [QLUTGJHZ2018001]
- Taishan Scholar Program of Shandong [0308150303]
- Program for Scientific Research Innovation Team in Colleges and Universities of Shandong Province
- A*STAR
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A series of hybrid thermoplastic polyurethanes (PUs) were synthesized from bi-functional polyhedral oligomeric silsesquioxane (B-POSS) and polycaprolactone (PCL) using 1,6-hexamethylene diisocyanate (HDI) as a coupling agent for the first time. The newly synthesized hybrid materials were fully characterized in terms of structure, morphology, thermal and mechanical performance, as well as their toughening effect toward polyesters. Thermal gravimeter analysis (TGA) and differential scanning calorimetry (DSC) showed enhanced thermal stability by 76 degrees C higher in decomposition temperature (T-d) of the POSS PUs, and 22 degrees C higher glass transition temperature (T-g) when compared with control PU without POSS. Static contact angle results showed a significant increment of 49.8 degrees and 53.4 degrees for the respective surface hydrophobicity and lipophilicity measurements. More importantly, both storage modulus (G') and loss modulus (G '') are improved in the hybrid POSS PUs and these parameters can be further adjusted by varying POSS content in the copolymer. As a biodegradable hybrid filler, the as-synthesized POSS PUs also demonstrated a remarkable effect in toughening commercial polyesters, indicating a simple yet useful strategy in developing high-performance polyester for advanced biomedical applications.
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