Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 113, Issue 48, Pages 20666-20673Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp9059642
Keywords
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Funding
- National Science Council, Taiwan, Republic of China [NSC97-2221-E-110-013-MY3, NSC98-2221-E-110-006, NSC 98-2120-M-009-001]
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In this study, we found that poly(vinyl phenol)/polybenzoxazine (PVPh/PBZ) copolymers feature low surface energies when they possess a minimal number of intermolecular hydrogen-bonding interactions. For example, PVPh/PBZ = 30/70 exhibits an extremely low surface energy of 16.8 mJ/m(2) after thermal curing-even lower than that of poly(tetrafluoroethylene) (22.0 mJ/m(2))-based on calculations performed using a two-liquid geometric method. Infrared spectroscopic analyses indicated that a decrease in the degree of intermolecular hydrogen bonding in the PVPh/PBZ copolymers resulted in a lower surface free energy. An increase in the intermolecular hydrogen bonding did, however, enhance the thermal properties, namely, the glass-transition temperature, the thermal decomposition temperature, and the char yield. The manipulation of intermolecular hydrogen-bonding interactions is a unique and simple approach toward preparing low-surface-energy materials without the need to employ fluoropolymers or silicones.
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