科技论文英文翻译中文(材料类)(正文第2部分)

来源:百度知道 编辑:UC知道 时间:2024/06/05 04:50:36
2. Experimental
2.1. Synthesis of PAMS
The polymer was synthesised according to the method reported in Ref. [9]. The structure of the polymer is presented in Scheme 1.
Mn of the synthesised polymer was 1600 g/mol as determined by vapour pressure osmometry, which corresponds to an amine equivalent weight of 58.5 g/eq. NH2; it contained a cyclics weight fraction of 15%.
2.2. Materials
DGEBA was supplied by Gairesa (Spain). Before mixing, DGEBA and PAMS were vacuum degassed for 2 happroximately. Stoichiometric mixtures of DGEBA and PAMS were prepared gravimetrically. Once mixed, the mixture was vigorously stirred and vacuum degassed again for 3 min, and injected into a glass mould for curing. The glass walls of the mould were covered with a fine layer of a grease demoulding agent. Samples were cured at 120 ℃ for 1 h and postcured 1 h at 130 and 150 ℃. A second set of samples were cured 2 h at 60 ℃ and postcured 1 hat 80, 100 and 120 ℃. After curing, the samples w

2 。实验
2.1 。参与机构调动系统的合成
聚合物合成方法根据报告编号。 [ 9 ] 。结构的聚合物是在计划1 。
锰的合成聚合物一千六百克/摩尔所确定的蒸汽压力osmometry ,相当于一个胺当量五十八点五克/情商。氨基;它载有cyclics质量分数为15 % 。
2.2 。材料
DGEBA是所提供的Gairesa (西班牙) 。前混合, DGEBA和参与机构调动系统的真空脱气2 happroximately 。计量混合物DGEBA和参与机构调动系统准备gravimetrically 。一旦混合,混合物是大力搅拌和真空脱气再次为3分钟,并注射到玻璃模具治疗。玻璃幕墙的模具涵盖罚款层油脂脱模代理人。样品在120 ℃固化为1 h和postcured 1小时130和150 ℃ 。第二组样品进行了治愈2小时60 ℃和postcured 1帽80 , 100和120 ℃ 。硬化后,样本demould切成块尺寸1厘米× 4厘米× 0.057厘米。
2.3 。方法
吸水率测定gravimetrically在50 ℃ 。样本浸泡在蒸馏水和重量是衡量其作为一个功能浸泡时间超过2周时期。事先浸泡治愈样本清洁二氯甲烷。水分含量测定也近红外光谱(珀金埃尔默GX2000 ) 。光谱条件10扫描7000至4000 cm - 1处。水带(胡,吨)出现在范围5360-5020 cm - 1的[ 10 ] ,并integratedusing标准例程的控制软件。以正确的数量变化的影响,由于肿胀,参考波段( 4623厘米- 1 )相应的芳香的CH振动紧张的树脂( 232 )被选定。已经证明,存在着线性关系,综合近红外波段和重量的水,因此胡可转化为水含量,重量,根据公式:
在胡, 0是综合吸收浸泡时间t = 0 。环氧转换测量也傅里叶变换近红外。环氧带综合范围4588-4507 cm - 1处,它也被称为带的提法。
玻璃化转变温度测量了差示扫描量热法( DSC ,珀金埃尔默的DSC - 7 )在10K为民- 1 ,使用标准的例程。