氘代聚合物膜靶制备技术与性能研究
Preparation and characteristics of perdeuterated polystyrene films
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摘要: 氘代聚合物膜是快点火基础物理实验的一种重要靶型。通过氘代苯乙烯单体的本体自由基聚合反应制备氘代聚苯乙烯，并利用流延法和浇铸法制备出厚度从几十nm到数百μm的膜靶。溶剂挥发过程中的随机扰动对膜厚均匀性造成影响，采用清洁的基片和在涂沫基片或模具外加防护罩可以降低这种影响。采用PVA作脱膜剂有利于获得较薄的聚合物薄膜。DSC分析表明薄膜的玻璃化转变温度与热处理过程有关，缓慢退火有利于提高Ｔ-g和储能模量。Abstract: Perdeuterated polymer film is a typical target of fast ignition physics. Perdeuterated polystyrene (DPS) was synthesized by free radical polymerization, and DPS films with thickness from 30nm to 450μm were prepared by dip coating and casting. The influence of the random disturbance occurred at gaslliquid interface on the thickness distribution of the DPS films would be reduced by clean substrate and cover on the substrate or mould. The thinner films can be obtamed with PVA as stripping agent. The glass transition temperature of the DPS film is relevant to its heat history. Annealing slowly increases the T-g and storage modulus of the films.
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Key words:
- perdeuterated pdystyrene(dps) /
- film /
- glass transition temperature /
- dip coating /
- casting
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