opening n. 1. 开,开放;开始,着手;开端,开头;开场,开幕。 2.口,孔,缝,洞;空隙;通路。 3.空地,空场;〔美国〕林间空地。 4.(职位的)空缺;好机会 (for)。 5.【象棋】开局,头几着。 6.【律】辩护人的申办书。 7.【商业】开盘,交易开始时间。 adj. 开始的。 an opening address [speech] 开幕辞。 an opening ceremony 开会[开学、开幕、通车]典礼。 look out for an opening 谋事,找就业机会。
Ring opening polymerization of 3 - morpholinone and - caprolactone with zinc powder as catalyst 己内酯的开环聚合反应
Ring opening polymerization 开环聚合
Synthesis of polylactide and its copolymers by methods of ring opening polymerization and their application in bone surgical materials 聚乳酸合成及其共聚物在可降解骨材料领域的应用
When the liquid formulation wre coated on optical substrate and exposed to uv irradiation , the initiators decomposed to cations intermediate and catalyzes the ring opening polymerization to form solid network 配合适量之光起始剂,将液态树脂涂布于光透明基材上,经由uv照光可进行快速交联反应机制,形成固体聚合物。