发气量

选用EPDM作橡胶介质，重点测试了发泡剂H在EPDM胶料中的分解温度、发气量及分解速度等参数。

The decomposition temperature ( Td ), gas evolution and decomposition rate of blowing agents , especial blowing agent H ( dinitrosopentamethylenetetramine ) in EPDM compounds were investigated .

随着负压度和涂层透气性的增加，EPS热解产物能够更快地排出型腔，在高温区停留的时间减少，EPS发气量降低。

With the increase of vacuum rate and permeability , the thermal degraded products of EPS remove from the mold cavity more quickly and stay in high temperature area shorter , so gas evolution decreases .

ADC发泡剂发气量测定方法的改进

Improvement of the determination method about gas volume blowing in ADC foaming agent

发泡剂ADC具有发气量大，分解产物无毒、无污染，价格便宜等优点。

ADC blowing agent has lots of advantages with large gas production , non-toxic , non-polluting properties , and cheap price and so on .

在普通的偶氮二甲酰胺（AC发泡剂）中按不同的质量配比加入不同的添加剂制得了改性AC发泡剂，测定了最大发气量和突发温度，探索出改性AC发泡剂产品的配方。

Modified azodicarbonamide ( MAC ) was obtained by blending different additives with the single AC blowing agent in different mass ratios , the maximum decomposition gas volume and the outburst temperature were measured and some proper formulations were found out .

FS粉可以取代煤粉作抗粘砂材料，其加入量比煤粉少，可以显著降低型砂的灰分、水分和发气量，提高透气性。FS粉在铸铁湿型砂中的应用研究

FS powder can be used as a substitute for coal dust to prevent metal penetration . An Investigation on Application of FS Flour to Green Moulding Sand for Iron Casting Production

结果表明，随着树脂加入量的增加，砂芯的初始强度和24h终强度增加，砂芯发气量也相应增大。

The results showed that the initial strength and the 24h final strength of sand core increased with the increase of amount of addition of resin , the gas evolution indicate the same variation tendency .

试验结果表明，浇注温度对EPS热解产物的组成以及EPS在型腔中的发气量有着决定性的影响，从而影响金属液流动前沿的形态；

The results showed that pouring temperature play a critical role on components of thermal degraded product of EPS and gas evolution in mold cavity , which has an effect on the front shape of the molten metal .

高强度低发气量覆膜砂用酚醛树脂的研制

Development of a Phenolic Novolac for High strength , Low Gas evolution Coated Sand

试验表明，只要涂料发气量小于5ml/g，铸管不会产生表面气孔。

The test shows that no surface blowhole formed when the amount of gas evolution was less than 5ml / g.

同合脂相比，该粘结剂具有发气量少，强度高，无污染等特点。

Contrasting to synthetic fat binder , this adhesive has the advantages of less gas releasing , High strength and no pollution .

这种醇基涂料还具有强度高、发气量低、涂刷性好和点火不起泡等特点。

These alcohol-based coatings have characters of higher strength , lo - wer gas evolution , better brush ability and no blister when igniting .

发气量试验方法的优点是能够迅速和准确地确定型砂中有效煤粉的具体含量。

The gas evolution test method has the advantage that the effective coal dust content in green sand can be determined rapidly and accurately .

研究树脂砂的强度、发气量、表面稳定性、耐热性等性能，保证树脂砂的适用性。

Performances such as strength , air release , surface stability and thermal resistance of resin sand are studied to ensure the suitability of resin sand .

结果表明，对原砂进行表面处理可以提高粘结剂的粘结效率，提高覆膜砂的强度，减少树脂加入量，降低发气量。

The results have shown that the precoated sands with low resin content , high strength , and low gas evolution can be obtained by surface treatment .

当水冷法管模涂料发气量≤55mL/g时，铸管表面不产生气孔缺陷。

No surface blowhole formed in cast pipe when the amount of gas evolution from the coating of pipe model for water-cooled centrifugal cast was less than 5.5mL/g .

采用失重法检测复合剂从20℃至1580℃范围内的发气量，研究复合剂发气性与复合材料品质之间的关系。

The relation between the gas evolution of self-made complex additive and quality of MMCs have been studied by weightlessness method when temperature of complex additive is 20 ℃ to 1 580 ℃ .

选择氧化锌作该体系发泡助剂，降低发泡剂分解温度、发气量，满足产品要求。

Zinc oxide was used as foaming auxiliary agent for the foaming system , which could lower the decomposition temperature and blowing gas of the foaming agent , met the requirement of product .

在满足型芯砂性能要求的前提下，充分发挥粘结剂的粘结效率是降低覆膜砂发气量，防止铸件产生与气体有关的缺陷，降低铸件成本，提高生产效益的关键；

It is the key to reducing gas evolution of precoated sands , preventing defects associated with gas from forming and driving cost of castings down , and obtaining higher efficiency of production for bringing adhesive agent into play completely .

铸模性能测试表明，经可发性处理后的共聚物试样发气量为1016.6mL/g、灼烧残留量为0.012%，可作为市售气化铸模材料的优良替代品。

The casting mould performance tests of the expanded copolymer showed that the gasifying volume and burning residual of the copolymer beads are 1 016.6 mL / g and 0.012 % respectively . So this copolymer may be a good substitute for EPC materials on the market .