%0 Journal Article %T Surface roughness and foam morphology of cellulose acetate sheets foamed with 1,3,3,3‐tetrafluoropropene %A Hopmann, Christian %A Hendriks, Sven %A Spicker, Claudia %A Zepnik, Stefan %A van Lück, Frank %J Polymer Engineering & Science %V 57 %N 4 %P 441-449 %@ 0032-3888 %D 2017-04-01 %I Wiley Subscription Services, Inc., A Wiley Company %~ DeepDyve