摘要
本文研究了苯乙烯在空气存在下的γ辐照。用硅胶柱层分离在辐射总剂量为５×１０＾４Ｇｙ，辐射剂量率分别为２．９，０．７，０．５和０．３Ｇｙ／ｓ的条件下形成的过氧化物，发现剂量率在０．５Ｇｙ／ｓ以上时产物都可分成三种组分，而组分分布随剂量率不同而异。当剂量率为０．３Ｇｙ／ｓ时，产物只包含单一的，相当于第二组分的过氧化物。对剂量率为０．７Ｇｙ／ｓ时生成的三种过氧化物组分用红外光谱。
Preirradiation of styrene under total dosage 5 ×104 Gy of γ-ray radiation and different dose rate 2.9 Gy/s, 0.7 Gy/s, 0.5Gy/s and 0.3 Gy/s were investigated. The peroxides formed during Preirradiation were separated by silica gel column chromatography in three components, 1,2 and 3 respectively. The distribution of components was different with the different dose rate. The peroxide isolated only the single component 2 when dose rate was 0.3 Gy / s. Their structures were studied by IR, 1H NMR and MS. It was found the component 2 possesses strong initiating reactivity with the structure of alternating peroxide, initiates smoother polymerization than BPO under lower temperature and shorter time. It also initiates copolymerization with other monomer.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1994年第6期603-608,共6页
Acta Chimica Sinica
