pmda

Productive Process of PMDA by Air Phase Oxidation and Its Collecting Methods by Condensing Mode

气相法均苯四甲酸二酐生产工艺及其冷凝态收集方法

Then , the aim , task and technique routing of PMDA are presented . 2 .

在此基础上提出了PMDA研究的目标、任务和技术路线。

Effect of copolymerization and mechanical blending on performance of PMDA / ODA-polyimide

共聚与机械共混对PMDA/ODA型聚酰亚胺性能的影响

Selective complexing method of synthesis of pure p-terphenyl with PMDA

用PMDA选择络合法制备纯p-三联苯

When the mole content of PMDA in the dianhydride was 20 % , the property of the product reached the best .

当PMDA在二酐中含量为20m01%时，产物综合性能最优。

With comparison to the mechanical Coulomb friction , a generalized model of nonlinear hysteresis of PMDA was advanced , based on the essential analysis of nonlinear phenomenon .

基于非线性迟滞现象的本质分析，提出了非线性迟滞现象的一种广义模型。

Batch mixer experimental results showed that a certain amount of PMDA could increase the chain extension / branching degree of R-PET , which led to the decrease in melt flow rate , crystallization temperature and melting temperature .

密炼实验结果表明：一定量的均苯四甲酸二酐（PMDA）能够增加R-PET扩链/支化度，从而熔体流动速率减小，结晶温度和熔融温度降低。

Polyamide acid was prepared by means of polycondensation , taking PMDA and ODA as raw materials , and the effect of reaction time on the change of the weight-average molar mass of polyamide acid was measured by gel permeation chromatography ( GPC ) .

以均苯四甲酸二酐、4,4′二胺基二苯醚为原料，通过缩聚反应制备了聚酰胺酸，采用凝胶渗透色谱（GPC）考察了反应时间对产物重均摩尔质量的影响；