聚甲醛

On the above mentioned base, the metallized films of polyvinyl formal , polyvinyl butyral and polyethersulphone prepared by reduction were newly developed.

在系统地研究聚乙烯醇和聚丙烯腈/金属盐体系表面金属化的同时，又开发了聚乙烯醇缩甲醛、聚乙烯醇缩丁醛和聚醚砜/金属盐体系，并对这些材料表面金属化的条件和影响因素进行了详细研究。

For the synthesis reaction of chalcone, cyclohexanone aldolization and biodiesel,γ-Al_2O_3-NaOH-Na solid superacid has a satisfactory catalytic activity. With hypnone and phenylaldehyde as raw material, amount of catalyst 7.5% wt% of material, mole ratio of hypnone and phenylaldehyde 1:1.1, reaction temperature 40℃, after 3 hours, the yield of chalcone can be up to 96.88%. With cyclohexanone as raw material, amount of catalyst 10% wt% of material, reaction temperature 190℃, after 3 hours, dimmer of cyclohexanone can be up to 85.66%.

将该固体超强碱催化剂应用于查尔酮、环己酮自缩合以及生物柴油的合成反应中，该改性固体超强碱催化剂表现出了良好的催化活性：以苯乙酮和苯甲醛为原料，反应温度为40℃，催化剂用量为反应物总质量的7.5％，苯甲醛与苯乙酮摩尔比为1：1.1，反应3h查尔酮产率可达96.88％；以环已酮为原料，催化剂用量为原料总质量的10％，反应温度为190℃，反应3h，二聚物的总收率可达85.66％；以动物油和甲醇为原料，醇油摩尔为9：1，催化剂用量为动物油质量的2％，反应温度为70℃，反应3h后，生物柴油的收率可达91.8％。

Synthesis and performance of itaconic acid- maleic acid copolymer

性质： 一般可分为萘磺酸-甲醛缩合物和磺化三聚氰胺甲醛缩合物。

The superplasticizer CS-SR3 is completely different from traditional formaldehyde or lignosulphonate based water-reducing admixtures.CS-SR3 is a new kind of high performance polycarboxylate water-reducing admixture without any formaldehyde.

超塑化剂CS-SR3与传统的由甲醛、萘磺酸缩聚而成的萘系和木质素磺酸盐减水剂是完全不同的，是一种新的完全不含甲醛的高性能聚羧酸系高效减水剂。

The superplasticizer CS-SP1 is completely different from traditional formaldehyde or lignosulphonate based water-reducing admixtures. CS-SP1 is a new kind of high performance polycarboxylate water-reducing admixture without any formaldehyde.

超塑化剂CS-SP1与传统的由甲醛、萘磺酸缩聚而成的萘系和木质素磺酸盐减水剂是完全不同的，是一种新的完全不含甲醛的高性能聚羧酸系高效减水剂。

The superplasticizer CS-SX1 is completely different from traditional formaldehyde or lignosulphonate based water-reducing admixtures. CS-SX1 is a new kind of high performance polycarboxylate water-reducing admixture without any formaldehyde.

超塑化剂CS-SX1与传统的由甲醛、萘磺酸缩聚而成的萘系和木质素磺酸盐减水剂是完全不同的，是一种新的完全不含甲醛的高性能聚羧酸系高效减水剂。

Adopting condensation copolymerization between alkylphenol polyoxyethylene ether and methyl aldehyde and using concentrated sulfuric acid sulfonation, which it with sodium hydroxide neutralization, finally acquired sulphonate anionic surfactant, utilize as temperature resistance 、mineral salt tolerance for heavy oil viscosity reducer , research on the performance evaluation, the result indicate, the amount of sulphonate anionic surfactant to be used at 0.2wt%, viscosity reducer rate reached 92.1%; added with 0.5wt%, the calcium and magnesium ions resistance in mineral water up to 800mg/L.

采用辛基酚聚氧乙烯醚和甲醛的共缩聚物与浓硫酸磺化后，再用氢氧化钠中和后得到磺酸盐阴离子表面活性剂作耐温抗矿盐稠油降粘剂，并对其进行性能评价，结果表明，辛基酚聚氧乙烯醚甲醛共缩聚物磺酸盐阴离子表面活性剂加量为0.2wt%时，降粘率高达92.1%，抗钙、镁离子能力达800mg/L。

Melamine formaldehyde resin is a thermosetting polymer,spinnability and flexibility of fiber are poor.

三聚氰胺甲醛树脂是热固性高聚物，成纤性差，成纤纤维韧性差；通过苯代三聚氰胺、聚乙烯醇对三聚氰胺树脂进行改性，提高了树脂溶液的可纺性，所制纤维的柔韧性得到了提高。

But in the timber industry of our country, most of adhesives are Urea formaldehyde resin adhesive, phenol-formaldehyde resin adhesive and melamine formaldehyde resin adhesive which used formaldehyde as raw material.

在我国木材工业中，木材胶黏剂主要是以甲醛为原料的脲醛树脂胶黏剂、酚醛树脂胶黏剂和三聚氰胺-甲醛树脂胶黏剂。

Melamine formaldehyde moulding material was prepared by melamine formaldehyde resin and cellulose.

以三聚氰胺甲醛树脂为胶粘剂，纤维素为增强材料，制得三聚氰胺甲醛模塑料。

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。