新型含磷双酚A型共聚醚醚酮的合成与性能

A novel poly(ether ether ketone) derived from 2 (6 oxide 6H dibenz〈c, e〉〈1, 2〉oxa phospho rin 6 yl) 1,4 dihydroxyphenylene, 4, 4′ diflourodiphenylketone and bisphenol A was synthesized by solution polycondensation. The influences of reaction time, and concentration of reactants on the polymerization were investigated . A copolymer with inherent viscosity of 1 44 was obtained. As characterized by FT IR, 1 H NMR and 31 P NMR the product was a terpolymer, consisted of bisphenol A and difluorodiphenylketone. The DSC analysis show its T g was 171 ℃. The copolymer was soluble in many polar solvents.

LW3—1中心平台导管架ODP结构方案设计

LW3-1中心处理平台位于南海，水深205米，属于大水深导管架平台。导管架采用滑移装船、滑移下水；上部组块重量巨大，采用浮托法安装就位。本文对南海海况下，大水深导管架在前期结构设计方案阶段中的结构安全、正常使用、运输时重量控制、下水时的浮力控制等关键技术问题进行了探讨，提出了一系列的技术措施与优化原则，为后续的基本设计及详细设计奠定了良好的基础。该研究对处于临界水深的导管架的设计具有较强的参考价值，可以为以后设计同类的结构提供有益的借鉴。