Abstract
Abstract Cell opening characteristics dependent on the cell openers for the conventional formulation of a closed-cell polyurethane foam (PUF) was studied using 1-butanol and lithium salt of 12-hydroxystearic acid (Li-12HSA) as the reactive cell opening agents. While cell openining content of only 10.5 % was obtained for the sample with 4 phr of 1-butanol as the single reactive cell opener, that of 98.0% could be obtained for the sample with 2 phr of Li-12HSA as the reactive co-cell opener. As the results, it showed that a fully open-cell rigid PUF could be obtained by introducing a novel reactive cell opener, having a functional group able to form a bulky side-chain on the urethane networks, without severe loss of mechanical properties of the closed-cell PUF like cell size, bulk density, and thermal conductivity. 
서론
[ Fig. 1 ] Chemical structure of Li-12HSA.
실험방법
샘플은 one-shot 방식으로 제조하였으며, Table 1에서 보인 

{'paper_id': '136834003', 'title': 'Open-Cell Rigid Polyurethane Foam Using Reactive Cell Opening Agents', 's2_url': 'https://api.semanticscholar.org/CorpusID:136834003', 'source': 'S2ORC'}