| 학회 |
한국고분자학회 |
| 학술대회 |
2022년 봄 (04/06 ~ 04/08, 대전컨벤션센터) |
| 권호 |
47권 1호 |
| 발표분야 |
Virtual Lightning Session |
| 제목 |
Fractions of “Bonded” and “Unbonded” Monomers Determine POSS-Containing Nanocomposite Tg |
| 초록 |
We report that the fractions of “bonded” or “unbonded” monomers at a filler interface dictate the composition dependence of the glass transition temperatures (Tg) of polyhedral oligomeric silsesquioxane (POSS)-containing nanocomposites. Tg is arguably the single most important material property; however, predicting Tg in nanocomposites is often challenging because of confounding interfacial effects. To this end, we design a model nanocomposite to systematically study Tg of nanocomposites by leveraging the “all-interfacial” nature of ultrasmall POSS fillers loaded into random copolymers of styrene and 2-vinylpyridine (2VP). The amine-functionalized POSS forms hydrogen bonds only with 2VP, which behaves as a “bonded” monomer. The influence of copolymer composition and POSS loading on the Tg of this model composite is successfully explained by a Fox equation framework. This model also captures the Tg increase of other POSS-based polymer composites and potentially directs the future design of nanocomposite materials with tailored Tg. |
| 저자 |
Walter W. Young, Joseph P. Saez, Reika Katsumata
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| 소속 |
Univ. of Massachusetts Amherst |
| 키워드 |
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| E-Mail |
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