pmda
- 网络均苯四甲酸二酐;均苯四甲酸酐
![pmda](../cache/624038.jpg)
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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
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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。
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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
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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
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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。
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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。
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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。
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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;