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r pvc
相关语句
  硬质聚氯乙烯
     Low Foamed R PVC Extrusion Procession I: Study and Design of Formulation
     硬质聚氯乙烯低发泡挤出专用料的研究(1)——配方设计与研究
短句来源
     Regulating the Plasticizing Rate of R PVC Pipe
     硬质聚氯乙烯管材塑化度及调整
短句来源
  硬质pvc
     The effects of the ingredients in the formulation on the low foamed R PVC extrusion stability were studied. A formulation was developed with which a low foamed semi product can be produced. The density of the semi product is about 0.8 g·cm -3 .
     研究了主要配方组分对硬质PVC低发泡挤出过程稳定性的影响,设计并筛选出制品密度ρ=08gcm-3的实用硬PVC低发泡挤出制品配方。
短句来源
  “r pvc”译为未确定词的双语例句
     R PVC/CPE Blend Toughness by PMMA Basic Core Shell Rigid Organic Filler
     PMMA基纳米核-壳微粒改性R-PVC研究
短句来源
     The decomposing dynamic and thermodynamic properties of blowing agents AC,Exoceral 232 and CCF were tested with device to measure the volume of gas given out by blowing agents and the differential scanning calorimeter (DSC). The effects of processing agents K 400 and ZB 530 on plasticating properties of R PVC were investigated.
     采用自行设计安装的放气量测量装置和DSC差示扫描量热仪对发泡剂AC、Exocerol232 和CCF进行分解动力学和热力学性能测试,研究了泡孔调节剂K-400、ZB-530 对R-PVC基本配方体系塑化性能的影响。
短句来源
     The formula of good mixing material for microcellular R PVC extrusion was selected.
     利用Brabender挤出机对微发泡R-PVC挤出专用料的配方进行了优选
短句来源
     The difference between the kinetics and thermodynamics of decomposition ofthe typical blowing agents were compared, and the blowing feature in actual processing by in R PVC brabender extruder were verified.
     采用动力学与热力学相结合的方法对各体系的分解热力学和动力学进行了系统的研究 ,对各类典型发泡剂的优缺点进行了详细比较 ,并利用 Brabender挤出机对复合发泡剂的实际发泡特性进行了验证。
短句来源
     At the same time the problems in actual application of R PVC are proposed and developmental direction is pointed.
     同时提出了UPVC管在实际应用中遇到的问题及其发展方向。
短句来源
  相似匹配句对
     The environment problems of PVC
     化学建材聚氯乙烯(PVC)的环境问题
短句来源
     Development of Fragrance PVC
     香型PVC的研制
短句来源
     Alloying and flexibility of PVC
     PVC的共混增韧
短句来源
     PVC Flock Adhesive
     PVC植绒胶
短句来源
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  r pvc
Damit lie?en sich Kriechkurven für PVC und UP ausreichend gut analytisch beschreiben.
      
Die ermittelten molaren Konzentrationen PVAz/Weichmacher variieren innerhalb derselben Grenzen, die wir schon früher für PVC/Weichmacher gefunden hatten.
      
Wegen der biologischen Aktivit?t von Organozinnverbindungen, die als Stabilisatoren für PVC-Mischungen verwendet werden, und ihrer bewiesenen Auslaugung aus Folien scheint es erforderlich, deren Anwendung in der Lebensmittelindustrie einzuschr?nken.
      


By studing the stress relaxation test of R-PVC in concentrated sulphuric acid, the relaxation times of R-PVC were determined under three loaded stresses (200, 250, 300kg/cm2) within given temperature region (40-65℃).

硬聚氯乙烯在浓硫酸中的应力松弛试验,测定了材料在一定温度范围(40~65℃)内,三种加载初应力(200、250、300kg/cm~2)下的松弛时间。所得松弛时间与温度的关系在一定区域内符合Arrehenius规律。由实验数据计算得到的松弛活化能与理论计算和热降解测得的断键活化能较为一致。这表明了硬聚氯乙烯在浓硫酸中腐蚀断链引起的化学松弛在整个松弛中占主要地位。

By impressing an oversize pin into a hole drilled in the test piece (ISO-4600),the critical strain of R-PVC is determined in concentrated sulphuric acid. We regard this critical strain as the creep failure limit, the rule of creep failure of the material is studied by the method of Larson-Miller parameter. The result shows that failure rule in concentrated sulphuric acid under high temperatures and high stresses is consistent with the service life of molecular fracture theory. The relationship among...

By impressing an oversize pin into a hole drilled in the test piece (ISO-4600),the critical strain of R-PVC is determined in concentrated sulphuric acid. We regard this critical strain as the creep failure limit, the rule of creep failure of the material is studied by the method of Larson-Miller parameter. The result shows that failure rule in concentrated sulphuric acid under high temperatures and high stresses is consistent with the service life of molecular fracture theory. The relationship among failure time, stress and temperature can be summed up as the following equation:

用ISO—4600压销法测定了硬聚氯乙烯塑料在浓硫酸中的临界应变。此值作为蠕变应变的破坏限,运用Larson-Miller参数法来研究材料的破坏规律。结果表明:高温、高应力下浓硫酸中的破坏规律符合分子断裂理论寿命推断公式。破坏时间,应力与温度三者之间关系可归纳为下式:

The ageing of rigid polyvinyl chloride (R-PVC) aggravated by nitric and sulfuric acids was studied by IR, UV Spectroscopy, thermo-analysis and molecular weight determination. It was found that a number of groups, such as -NO2, -ONO2, -ONO were incorporated into the backbone of the PVC chain. These groups cause the fransition reaction of the instable bonding between the stabilizers and the PVC chain. This not only changes the composition of the materials but also changes the physical conformation....

The ageing of rigid polyvinyl chloride (R-PVC) aggravated by nitric and sulfuric acids was studied by IR, UV Spectroscopy, thermo-analysis and molecular weight determination. It was found that a number of groups, such as -NO2, -ONO2, -ONO were incorporated into the backbone of the PVC chain. These groups cause the fransition reaction of the instable bonding between the stabilizers and the PVC chain. This not only changes the composition of the materials but also changes the physical conformation. The latter deeply influence the duration of R-PVC Products used in chemical environment.

用红外与紫外光谱法、热分析和分子量测定研究了硬聚氯乙烯在硝酸和硫酸中的老化。发现这是一个复杂的物理-化学过程。渗透到塑料内的介质使添加剂及聚合物的不稳定化学键发生转化反应,不单改变材料的化学组成与结构,还会改变其物理形态。后者对硬聚氯乙烯制品在化学介质中的使用耐久性的影响很大。

 
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