聚合物分子量

丙烯酰胺反相乳液共聚合&提高聚合物分子量和胶乳固含量的研究

Study on Inverse Emulsion Copolymerization of Acrylamide & Increasing the Molecular weight of Polymer and the Solid Content of Latexes

研究了聚合物分子量和纺丝溶液浓度、粘度、流速等因素对静电纺丝过程以及纳米纤维的形态与尺寸的影响，优化了静电纺丝参数，获得了不同形态的纳米纤维膜。

Parameters including molecular weight of polymer as well as concentration , viscosity and velocity of polymer solution were optimized , and their effects on the morphology and diameter of nanofibers were explored .

用辐射交联方法测定含氟聚合物分子量FEP分子量的测定

Molecular weight determination of fluoro - polymers with radiation crosslinking method

研究了混合助催化剂与DQ-1型和N型催化剂分别配合催化丙烯均聚的聚合物分子量分布和活性中心分布。

The effects of different mixtures of cocatalysts on the active sites distribution in propylene polymerization were investigated .

用GPC法测定了各聚合物分子量，用1HNMR法表征了各聚合物化学结构。

Molecular weight and chemical structure of each polymer have been characterized by gel permeation chromatography ( GPC ) and 1H-NMR , respectively .

并利用GPC、Z-扫描等测试手段对这种新型聚合物分子量、分子量分布及其光限幅性能进行测试和分析。

We tested and analysised this new type of polymer molecular weight , molecular weight distribution and the optical limiting performance by using GPC , Z-scan and other tests .

考察了聚合物分子量、温度及小分子物质的加入对PAM与PEG相互作用的影响。

The effects of the polymer molecular weight , temperature , and the addition of some compound with low molecular weight on the interaction between PAM and PEG in water were studied .

分别研究了pH值、引发剂用量、聚合浓度、反应起始温度等因素对聚合物分子量的影响，优选出最佳合成工艺。

In order to obtain the optimum process conditions , the effects of some factors , such as pH value , the dosage of initiators , the consistency of reactant and the temperature of initiation reaction , on molecular weight were studied .

结果表明，锡（Sn）是理想的乳酸缩合聚合催化剂，而直接将分子筛加入到聚合反应体系中可有效地提高聚合物分子量。

Tin powder ( Sn ) was the effective catalyst on the direct condensation polymerization of lactic acid , and the molecule weight of polylactic acid could be increased by putting zeolite in the polymerization system directly .

Plackett-Burman试验结果表明聚合物分子量对体积比有高度显著的负影响，而细胞浓度、电解质、静置时间及pH值无显著影响。

Results from Plackett-Burman design presented that the molecular weight of PEG and DEX had highly significant and negative effects on volume ratio while cell density , electrolytes , settling time and pH were insignificant .

用红外光谱（FT-IR）表征了产物分子结构，用非水滴定方法分析了产物的酸值，用凝胶渗透色谱（GPC）测定了聚合物分子量和分子量多分散系数。

The polymers were characterized by Fourier trans - form infrared spectroscopy ( FT-IR ) . Acid value , molecular weight and polydispersity index ( PDI ) of the polymers were determined by non-aqueous titration method and gel permeation chromatography ( GPC ), respectively .

考察了八甲基环四硅氧烷（D4）在碱性条件下的温度、pH值、反应时间以及乳化剂复配和用量、偶联剂用量等影响单体转化率、乳液稳定性及聚合物分子量的因素。

The influence of factor octamethylcyclotetrasiloxane ( D_4 ) on the monomer convert ratio , emulsion stability and the polymer molecular weight in the alkalescence condition , such as temperature , pH , reaction time and dosage of emulsifying agent and silane coupling agent were studied .

DMAEMA在水溶液中的RAFT聚合反应研究了RAFT试剂二硫代苯甲酸4-氰基戊酸（CPADB）浓度、引发剂浓度等条件对聚合速率，聚合物分子量及分子量分布的影响。

Synthesis of 2 - ( DimethyIamino ) ethyl Methacrylate Homopolymers via Aqueous RAFT Polymerization For RAFT polymerization system , the effects of variations on the rate of polymerization , first-order kinetics , molecular weight and molecular weight distribution have been investigated .

结果表明，该聚合体系呈现活性自由基聚合的特征，即聚合物分子量随单体转化率呈线性增长，分子量分布较窄，ln（[M]0/[M]）和聚合时间之间存在线性关系。

The results show that the molecular weight increases linearly with the increase of the monomer conversion , the molecular weight distribution ( MWD ) is narrow and a linear relationship between ln ( [ M ] 0 / [ M ] ) and polymerization time exists .

研究了12个单体铸膜在紫外（250nm）光照条件下拓扑固相聚合反应，利用紫外吸收光谱、红外光谱对聚合过程进行了表征，并用GPC对生成的聚合物分子量进行检测。

The solid-state polymerization of monomers were investigated in cast film under UV irradiation ( 250nm ) . Polymerization processes were characterized by UV , IR and the resulting polymer molecular weight was measured by GPC . 3 .

采用均匀设计实验法及凝胶渗透色谱（GPC）分析，详细考查了影响聚合物分子量及其分布的主要因素，并在此基础上对实验结果进行了回归分析及多目标优化计算。

The Uniform Design and Gel Penetrating Chromatogram ( GPC ) were used to investigate the main factors which have influence upon molecular weight and its distribution of acrylic resins , and the regression analysis and multi - aim optimization calculation were used in the data analysis of experimental results .

并通过对比详述了茂金属催化剂和Ziegler-Natta（Z-N）催化剂的催化机理，以及这两类催化剂对聚合物分子量和性能的影响。概括了对聚合物分子量影响的几种因素。

With comparison between the mechanism of these two kinds of catalysts of metallocene catalyst and Natta Ziegler ( Z-N ) of catalyst and details on the effects of polymer molecular weight polymer molecular weight , summarized the several influential factors .

聚合物分子量对其阻垢分散性能的影响

Effect of polymer molecular weight on the scale inhibition and dispersion performance

聚合物分子量与驱油效率关系的实验研究

Experimental study of relationship between polymer MOLECULARWEIGHT and sweep effciency

不可入孔隙体积与聚合物分子量选择研究

Research on Inaccessible Pore Volume and Polymer Molecular Weight Selection

乳液聚合物分子量愈小，涂膜光泽愈好。

The latexes with lower molecular weight tend to increase the film gloss .

加入氢气调节分子量后，聚合物分子量明显降低，分子量分布变窄。

Hydrogen regulation made the molecular weight lower and the molecular weight distribution narrower .

从聚合物分子量评价自由基聚合的链终止反应

Evaluation of chain termination in radical polymerization based on the molecular weights of polymers

在相同的剪切速率下，聚合物分子量增加，聚合物溶液的弹性增强。

At the same shear rate , elasticity intensifies with polymer molecular weight increasing .

聚合物分子量与岩心渗透率变异系数匹配关系的实验研究

Experimental study of matched relationship between polymer molecular weigh and core permeability variation factors

利用离散正交多项式组合神经网络建立聚合物分子量分布灰箱模型

Grey box model of polymer molecular weight distribution using hybrid discrete orthogonal polynomial neural network

聚合物分子量是影响聚合物减阻效果的诸多因素之一。

Molecular weight of polymer is one of the several influence factors upon drag-reduction performance of polymer .

讨论了聚合物分子量及淬冷温度对成膜孔结构的影响。

The effects of polymer molecular weight and quenching temperature on the porous structure are also discussed .

从聚合物分子量及聚合动力学参数计算链转移常数

Calculation of chain transfer constants from the molecular weights of polymers and the kinetic parameters of polymerization

提出了聚合物分子量和改性程度对絮凝效果的影响规律。

Thearticle deals with some principles under which molecular weights and extention of modification effect the flocculation .