聚甲醛

In this article, the glass transition temperature of a single polyoxymethylene chain adopting the modified bond fluctuation model was studied.

聚甲醛单链的键平均能量随温度增加而增加，比热在玻璃化转变温度 Tg 附近发生突变，同时发现 Tg 与链长 N有：Tg=T∞g -A/ N的关系

It was found that the energy Per Kuhnian bond of a single polyoxymethylene chain increases slowly at TT g , and the specific heat of this system is discontinuous around the glass transition temperature T g .

聚甲醛单链的键平均能量随温度增加而增加，比热在玻璃化转变温度 Tg 附近发生突变，同时发现 Tg 与链长 N有：Tg=T∞g -A/ N的关系

Polyoxymethylene isone of five engineering plastics which has excellent combined properties, especiallyexcellent friction behavior, therefore widely be applied in rotation parts of mechanical,electric motors, electric appliance accessories.

聚甲醛是五大工程塑料之一，综合性能优异，尤其是摩擦磨耗性能优良，因此最适用于作机械、电动机、电子电器用零件的转动部位材料。

High impact and low wear Polyoxymethylene blend was prepared by melt blending of POM with copolyamide, silicone grease, oil carrier and surfactant.

将聚甲醛与适量的三元共聚尼龙、矽油、载油体及表面活性剂熔融混合，制备出了性能优良的高抗冲、低磨耗POM共混物。

However, the application is limited for the reason of poor ageing-resistance of POM caused by its molecular structure.

本文首先采用乳液聚合方法制备了一种用于聚甲醛改性的丙烯酸酯聚合物。

POM Wonderful 100% Pomegranate Juice is the only pomegranate juice backed by $23 million in medical research.

聚甲醛美好的100 ％，石榴汁是唯一的石榴汁后盾， 2300万美元的医学研究。

Sky in Yunnan Province is the licensing POM brand-name products in the market is highly competitive.

云天化牌聚甲醛是云南省名牌产品，在市场上具有较强的是竞争能力。

POM is easy to form big spherical crystals due to its regular chain structure, resulting in low notched impact strength, sensitive to notch. On the other hand, POM is incompatible with most modifiers and difficult to be modified.

但聚甲醛分子链结构规整，无侧基，易结晶，形成大球晶，缺口敏感，缺口冲击强度低，韧性差，且与其它改性剂相容性差，难以增韧。

Ethyl dicyanopropionate was synthesized by one-step reaction with sodium cyanide, paraformaldehyde and ethyl cyanoacetate in solvent.

由氰化钠、多聚甲醛和氰乙酸乙酯在溶剂中反应，一步合成二氰基丙酸乙酯，收率达80.2%，含量90.8

The polyformaldehyde is an important interchangeable thermoplasticity engineering plastic.

聚甲醛是重要的通用型热塑性工程塑料。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。