Rate Of Oxidation Of Plasma Polymer (GDP or CH)

Cook, B ; Letts, S ; Fearon, E

Lawrence Livermore National Laboratory

关键词: Removal;    Plastics;    36 Materials Science;    Polymers;    Specifications;   

DOI  :  10.2172/877933
RP-ID  :  UCRL-TR-219454
RP-ID  :  W-7405-ENG-48
RP-ID  :  877933

美国|英语

来源: UNT Digital Library

【 摘 要 】

There has been concern and uncertainty about the level of O incorporation in plastic shells prepared by coating mandrels with plasma polymer (GDP) and the Ge-doped analogs. In FY05 we undertook a controlled study of the rate of oxidation under various conditions, both to quantify the levels and to determine methods for restricting the le levels. Our results are shown in the Figure below. In summary, the level can be kept to less than 0.2 atom % by pyrolyzing the shells at 300 C (which is necessary for the removal of the P{alpha}MS mandrel), and then restricting the exposure to air to less than about 100 hours, which is easy to do. Based on this result we believe the NIF capsule specification for O can safely be lowered to 0.2 atom %, and this level should be used in future design calculations.