Two different PLLA pellets,foreign fiber and domestic sheet material grade sample,have been analyzed by GPC,DSC,TGA,1H-NMR and 13C-NMR.
通过GPC、DSC、TGA1、H-NMR和13C-NMR等现代分析手段,对不同级别的聚乳酸切片进行对比,结果表明:纤维级切片分子量分布宽度较小;热稳定性好,在300℃以下,基本不发生降解;且聚合物中丙交酯单体残留量很低,LA单元的消旋现象很微弱,各项指标均优于片材级切片。
Through reviewing and prospecting the development of the bottle grade chip market,the article analyses the bottle grade chip market character that supply is more than demand since 2002 and gives some new marketing strategy of reducing cost and expanding market.
通过瓶片发展的历史回顾和未来展望 ,对 2 0 0 2年以来瓶级切片供过于求的市场特点进行了分析 ,并结合仪化公司发展瓶级切片的思路 ,提出了降低成本 ,开拓市场的营销策略 ,并对公司的产品链整合和营销管理提出了建
The author thinks tremendous business opportunities for the development and production of PET film-grade chips.
通过对聚酯薄膜的需求现状及国内薄膜生产企业产能发展趋势的分析 ,认为膜级切片专用料的开发和生产存在无限商
The mechanism,formation and development of water erosion at last stage blade are analyzed.
分析了汽轮机叶片水蚀的机理及水蚀的形成与发展过程,介绍了秦山第二核电厂650 MW 2号汽轮机末级叶片水蚀状况,对叶片现场修复的工艺方法、技术要求、工艺过程及注意事项进行了详细论述。
The optimum design for the last stage blade is one of the most important conditions to develop air-cooling units.
末级叶片的优化设计是发展空冷机组重要条件之一,正是由于选择了合适的末级叶片,对丰镇电厂的机组改造取得了成功。
For increasing the turbine efficiency,the new last stage blade is designed with more steam extraction area and less leaving loss than 620mm blade for steam turbine with air-cooled condenser.
为提高机组效率,需要设计一个比原有空冷末级620mm叶片排汽面积更大、余速损失更小的空冷末级叶片。
The Lose Efficacy Analyse on the Type of 3102JT Industry Turbine Last Stage Blade;
3102JT型工业透平次末级叶片的失效分析
Tie-pieces Retrofit of MP Rotator's Last Stage Blade for 200 MW Generating Unit
200MW机组中压转子末级叶片拉筋改造
Optimization design of typical blade profile of long blade in ultra-supercritical steam turbine
超临界机组末级叶片典型截面的叶型设计
CAUSE ANALYSIS OF FRACTURES ON LOW-PRESSURE LAST-STAGE BLADES IN N135-13.24/535/535 UNITS
N135-13.24/535/535型机组低压末级叶片裂纹原因分析
Study Methods for Vibration Characteristics of Last Stage Blades of Ultra Supercritical Steam Turbines
超超临界汽轮机末级叶片的振动特性研究方法
Analysis of Water Erode Theory and Research on Replacement of Stellite Strip on Turbine Last Stage Blade;
汽轮机低压缸末级叶片水蚀机理分析及司太立合金片更换研究
Breaking Cause Analysis of Shroud Band on Last Stage Blade of Low Voltage Rotor of 125 MW Set and Reconstruction
125 MW机组低压转子末级叶片围带断裂分析及改造
Preparation and Related Basic Research of C_3N_4/TiN Composite Coatings Used in the Last-stage Steam Turbine Blade for the Water Impact Erosion-resistance;
汽轮机末级叶片抗水蚀氮化碳/氮化钛复合涂层制备及其相关基础研究
The paper relates the crack situation of the last stage turbine blades of Shiheng power plant No.1 unit and the dealing of this problem, analyses the reason of crack and damage of the blades.
叙述了石横电厂1号机末级叶片的断裂情况以及对该问题的处理情况，分析了叶片的断裂、伤原因。
Analysis on Multi-order Static Frequency of Last Stage Long Blade of 1000MW Ultra Supercritical Turbines
1000MW超超临界汽轮机末级长叶片多阶静频分析
Analysis of Anti-corrosion Technology for Last Rotor Blades of Large Capacity Turbines
大容量汽轮机末级动叶片防水蚀工艺分析
bat having a leaflike flap at the end of the nose; especially of the families Phyllostomatidae and Rhinolophidae and Hipposideridae.
鼻子末端形如叶片的蝙蝠。
Fracture Failure Analysis on Primary Impeller Blades of Vertical Air Compressor
立空压机一级叶轮叶片断裂失效分析
ON THE THREE DIMENSIONAL CONTACT STRENGTH OF FINAL ARC FIR TREE BLADE ROOT AND ROTOR
末级圆弧枞树型叶根与轮缘三维接触强度研究
The Optimization of Aerodynamic Performance on a Long Blade Stage
某汽轮机长叶片级静叶栅气动性能优化
Analysis of Manufacturing Technologies of 600MW Steam Turbine Governing-stage Moving Blade Root
600MW汽轮机调节级动叶片叶根加工工艺分析
Effect of the Blade Diffuser on the Performance of Model Stage;
叶片扩压器对模型级性能的影响研究
Cause Analysis of Two-grades Axial-flow Primary Fan Blades Drifting
双级轴流一次风机叶片漂移原因分析