查询词典 acetacetic ester

Morphology of the modified cyanate ester resin system toughen ed by polyetherimide was investigated.

对聚醚酰亚胺增韧改性氰酸酯树脂体系的断面形态和冲击韧性进行分析，并对改性氰酸酯树脂体系的介电性能进行表征和分析。

In these thesis, the SWNTs have been surface modified by grafted with PEG and then filled into PU and Cyanate ester.

本文较系统的研究了碳纳米管表面改性及填充后对聚氨酯和氰酸酯树脂性能的影响。

The cyanate ester of novolac,prepared in this paper,has lower content of impurity,higher char yield and good processability,which is suitable for use as the matrix of high performance ablative material .

研究结果表明，所制备的酚醛型氰酸酯具有低的杂质含量、高的烧蚀残碳率，适合于高性能烧蚀材料的树脂基体。

Novolac cyanate ester resin is one of the high ablative-resisting polymer based materials. It also has superior beat-resistance, dielectric and mechanical properties.

酚醛型氰酸酯树脂是耐烧蚀性能最好的树脂材料之一，它具有优异耐热性和介电性能，同时又具有一定力学性能。

TMA analyses showed that Epon828/cyanate ester = 1/1 had lower CTE and good dimension stability.

TMA的分析，氰酸酯当量比例增加，使得热膨胀系数降低，而有较佳的尺寸安定性。

And they have been used in composites, adhesives, and electrics. However, like most other thermosets, they have suffered the drawback of brittleness. At the same time, reports on cyanate esters are all focused on bisphenol A dicyanate ester.

但像其它的热固性树脂一样，氰酸酯树脂普遍存在脆的弱点，限制了其应用，同时，目前关于这类性能优异的树脂基体的研究都集中在双酚A型氰酸酯树脂上。

Cyanate ester resins are considered as the most competitive resin for developing structural and functional materials with high performance in the 21st century, however, the high curing temperature and thus inducing poor property stability become the key problem retarding its application in a large scale.

氰酸酯树脂被公认为是，"21世纪制备高性能结构／功能材料最具竞争力的树脂品种"，但是高固化温度以及由此带来的固化物性能稳定性差的问题成为制约CE应用的瓶颈。

Two kinds of cyanate ester of novolac are synthesized with self-made phenolic resin varnish and high purity novolac .

分别以酚醛清漆、高纯酚醛为改性基体制备了酚醛三嗪树脂，并运用热失重分析研究了树脂的耐热性及残炭率。

BT resin, ie., blend of cyanate ester and bismaleimide, possesses good mechanical strength and is currently used in packaging material.

另外，商业上BT树脂是由氰酸脂及BMI所混成，他可以提供良好的机械强度及电气性质，因此广泛的被应用於封装产业。

ObjectiveTo explore the methods of prevention and cure of sun-induced aging dermis, and clarify the mechanism of Ginsenoside Rb1 on sun-induced aging dermis, with the study of expression of matrix metallo preteinases in sun-induced aging dermis fibroblasts' cytoplast, which are cultured in vitro, under the effect of Ginsenoside Rb1 and arotinoid ethyl ester.

目的通过人参皂苷Rb1与芳维甲酸乙酯对皮肤真皮体外培养光老化成纤维细胞胞质内基质金属蛋白酶表达的影响，阐明人参皂苷Rb1对光老化的防治机理，探索光老化的防治手段。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。