Compared with the aqueous phase precipitation polymerization of AN and aqueous phase suspension polymerization of AN, The pentad tacticity of PAN obtained by precipitation polymerization in supercritical CO_2 was analyzed by ~ 13C NMR method.
并认为,与其他两种PAN相比,CO2PAN等规立构规整度偏低的原因是由于所采用的CO2溶剂的非极性效应所致。
The triad tacticity of PAN obtained by precipitation polymerization in supercritical carbon dioxide was analyzed by 13C NMR and IR method.
以13C核磁共振技术为主,红外光谱技术为辅,测定和分析了超临界CO2中合成的聚丙烯腈(简称CO2 PAN)的三单元组立构规整度,推测出其在三单元序列上符合Bernoulli理论统计模型。
The molecular weight distribution and the tacticity of the HMW PVA were characterized.
采用醋酸乙烯在低温下以水为溶剂的紫外光引发乳液聚合方法，制得了高分子量的ＰＶＡ（为１３４００），并对所合成ＰＶＡ进行了分子量与分子量分布以及立构规整度的表征。
Study on Syndiotactic-rich and High Molecular Weight PVA;
高立构规整度高相对分子质量聚乙烯醇的研究
A Neodymium-Based Catalyst for Styrene Coordination Polymerization;
稀土催化合成立构规整聚苯乙烯的研究
On the Independent Regulatory Agency:Systematic Cause and Conditions of Legal Principle;
论独立规制机构：制度成因与法理要件
Set up Independent Directors System and Standardize Administering Structure of the Corporation;
建立独立董事制度 规范公司法人治理结构
The independence and Democracy of Justice:Value Integration and System Construction
司法的独立与民主:价值整合和制度架构
Federal administrative bodies issue rules and regulations of a quasi-legislative character.
联邦行政机构发布规章制度是一个准立法行为.
Institutional Choice of Independence of Regulatory Organizations for Naturally Monopolistic Industries in China;
中国自然垄断产业规制机构独立性的制度选择
The Study of Anionic Polymerization on Controlling the Degree of Tacticity of Polymers and Synthesis of Block Polymers;
阴离子聚合控制聚合物立构规整性及其嵌段共聚物的合成研究
adopting major rules and regulations of the company; -deciding to set up Branches; -amending the articles of association of the company
通过公司的重要规章制度;决定设立分支机构; 修改公司规章
Verticality and the main structure of the overall total deviation should be allowed to meet the plane bending norms.
主体结构的整体垂直度和整体平面弯曲的允许偏差应符合规范的规定.
Corporate Planning and Accountability Service
整体规划和问责制度处
3. Maintaining appropriate growth in fixed assets investment and readjusting and optimizing the investment structure.
（三）保持固定资产投资规模适度增长，调整和优化投资结构。
Synthesis and Characterization of Novel Orderly Tetra-functional Compound Containing Terphenyl Bridge
新型结构规整的三联苯桥基四官能度化合物的合成与表征
Synthesis and Self-assembly of Well-defined Polymer Brushes with High Grafting Density of Hydrophobic Poly(ε-caprolactone) and Hydrophilic Poly(2-(dimethylamino)ethyl methacrylate) Side Chains
结构规整的高密度两亲性接枝聚合物刷的合成及其自组装研究
stereoregular polybutadiene
有规立构聚丁二烯橡胶
stereoblock copolymer
立构规正嵌段共聚物
stereoblock polymer
立构规正嵌段聚合物
Study of the Structure Design and the Establishment of the Strength Criterion of the Vehicle Deck of the Landing Craft;
登陆舰车辆甲板结构设计和强度校核规范建立的研究
