The decomposition temperatures of this kind of pis are above 500 , the cutoff number is below 350nm , the rate of water absorption is below 1 % , these indicated that this kind of pis exhibited excellent heat resistance , better transparent , and lower water absorption 此外，这类聚酰亚胺的热分解温度在500以上，紫外截止波长在350nm以下，吸水率在0 . 6以下，说明它们具有优良的耐热性，较好的光学透明性和较低的吸水率。
Through the gc analyses and the nuclear magnetic resonance analyses showed that the copolyesters obtained here were random copolymers of 3hb and 3hv units . hv fraction in the copolymers reached 38 % . through thermal analyses showed that the melting point was reduced and pyrolysis temperature was increased 经气相色谱、核磁共振分析，此共聚物为3hb与3hv所组成的不规则共聚物， hv组分在共聚物中约占38 ；经热分析，获得的phbv共聚物的熔点有所降低，分解温度有所升高，在性能上优于phb 。
The mechanica1 performance is superior to p1ain pp . 0n the sem photographs of impact fracture surface , it was observed that the pu11out of si licate 1ayers hard1y was found and the compat ibi 1 ity of pp and montmori l 1oni te was improved great l y . xrd resu1 ts suggested that the basal spacing of silicate layer was about 4 小角xrd结果显示，复合材料中无机片层间距d _ ( 001 )在4 . 0nm左右，为插层型材料，通过dsc测试发现复合材料的熔点和分解温度均有一定的提高，蒙脱土的加入可提高材料的热性能。
Researching into tg - dt diagrams , we have concluded as follows : the initial decomposition temperature ( idct ) of polymer ( i ) is 220c and the first lost group ( flg ) ls carboxide ; the idct of polymer ( hi ) is 194cand the flg is - nh ; so the pyrolysis mechanisms of the two polymers are different 对聚合物( d和聚合物( l11 )的tg一ot研究表明:聚合物( d的开始分解温度为220 ，失去的第一个基团为> c = 0 ;聚合物( 11工)的开始分解温度为! 94oc ，先失基团为一阳，两者的热解机理不尽相同。
Both of them are added to the reactor by way in turn at lower temperature to control the over - saturation of k2feo4 , adoption of the lower reaction temperature as well as suitable reaction time , removing alkaline be done before disposing water and impurity in the purification procedure of k2feo4 cake ，其形貌呈长而薄的板条状；该晶体的某些晶面与水氯法所得kj 。样品相比出现了生长发育程度上的差异：本方法所得样品的热稳定性较高，随着晶粒由小到大，固态凡eo 。的热分解温度为536 557k ，
The results indicated that the dimension , shape and purity of base material could meet the functional demand of solid lubricant ; the thermal decomposition temperature of ptfe resin exceeds 400 c , but organic and inorganic packing filler added in ptfe made the water absorption rate of composite material increased , melting temperature and decomposition temperature decreased , in the meanwhile oxidative decomposition reaction was accompanied ; polar groups such as c = o , c - o - c and so on in the carbon fiber surface is advantageous to increase compatibility with other components and interlayer shearing strength ; uniform design experimental method could help to find the relationship between formula and frictional property by relatively small tests . the developing trend of each formula ' s friction coefficient could be showed by fitting curve ; the friction coefficient with no copper powder or graphite in formula was relatively big . this fact showed that copper powder and graphite should be used cooperatively ; it was found that when the ratio of copper powder to graphite by weight is 15 : 60 , 30 : 30 - 40 and 60 : 15 - 30 respectively , the friction coefficient was relatively small . the degree of crystallinity of pure ptfe reached maximum by air cooling and the abrasion loss also reached maximum among three ones ; at the same time , the abrasion loss of solid lubricant sample was also the biggest among three ones ; when solid lubricant matched with 45 # steel axle or gcrl5 steel axle , lubricant transfer film could be formed on metal surface , thus direct contact between the surface of metal friction pair rings was reduced . their working life was elongated extremely ; there was mainly much graphite , a little ptff , moo3 , feso4 , cus and so on in lubricant transfer film 试验结果表明：所选原料的尺寸、形状及纯度可满足固体润滑剂的性能要求；聚四氟乙烯树脂热分解温度超过400 ，但在ptfe中加入无机填料会使复合材料吸水率提高，熔融温度及分解温度降低，且伴有氧化分解反应；碳纤维表面含有c = o及c - o - c等极性基团，有利于提高其与其它组分的相容性，提高层间剪切强度；均匀设计试验方法能够用较少的试验次数找出配方与摩擦性能间的关系，拟合曲线基本能表示各配方的摩擦系数发展趋势；配方中不加铜粉或不加石墨，其摩擦系数均较高，说明铜粉和石墨应该配合使用；当铜粉15份、石墨60份时，铜粉30份、石墨30 - 40份时，铜粉60 、石墨15 - 30份时，摩擦系数均具有较低值；纯聚四氟乙烯树脂在空气冷却时结晶度最大，磨损量也是三者中最大的；同时，固体润滑剂试样在空气冷却时的磨损量也是三者中最大的：不论是固体润滑剂与45 #钢轴配副或是固体润滑剂镶嵌入铜套后与gcr15钢轴配副，在金属表面均可形成润滑转移膜，从而减少金属摩擦副表面间的直接接触，大大延长其使用寿命;转移膜中主要含有较多的石墨、少量聚四氟乙烯、 moo 。
And we also give the intercalation mechanism of emulsion polymerization , the reaction calories will be benefit to the exploit of montmorillonite . the properties of acr / mmt / pvc composites were characterized . the addition of montmorillonite can improve the strain strength ; enhance the decomposition temperature and vicat soft point , little influence to impact strength 将聚丙烯酸酯/蒙脱土纳米复合物与pvc树枝共混，考察了蒙脱土对pvc的改性效果，发现呈纳米分散的蒙脱土可以明显的提高pvc的拉伸强度、热分解温度和热变形温度，对抗冲性能影响不大。
( 1 ) carbon aerogel and xerogel were made from resorcinol - formaldehyde organic gels and used as the anode materials for lithium ion batteries . by discussing the influences of pyrolysis temperature , the level of the catalyst and the concentration of reactant in the preparation of carbon materials on their behavior of lithium ion storage , their performance of storing lithium ions and process of charge and discharge were studied in details . moreover , the relationship between the structure of carbon aerogel and xerogel and the performance of storing lithium ions was analysed , and the mechanism of the storage of lithium ions in this type of porous carbon materials based on organic gels was also dicussed simply ( 1 )从合成间苯二酚-甲醛有机凝胶出发，制备了碳干凝胶和气凝胶，研究了其作为锂离子电池碳阳极材料的储锂性能，探讨了碳材料制备过程中的热分解温度、催化剂用量、反应物含量等条件对碳干凝胶和气凝胶储锂行为的影响，并分析了碳材料结构与储锂性能的关系以及充放电过程，也简单探讨了锂离子在这类基于有机凝胶的多孔碳材料中的存储机制。
The omt after its suspension treated with ultrasonic wave was inserted with poly ( styrene - butyl acrylate ) emulsion . xrd test found the layers of omt particles were dispersed partly in the composite ; extraction experiment of nano - omt / pba - st composite indicated a great amount of macromolecule has inserted into the interlayer of omt . dta analysis showed the decompose temperature of composite has improved by 73 at 4 % omt 将omt的水悬浮液经超声波处理，与苯丙乳液复合， omt p ( ba - st )复合物的萃取和xrd试验证明乳液的大分子已经大量嵌入omt层间，使大部分omt以纳米级均匀分散于苯丙乳液之中； dta分析结果说明添加4 omt苯丙复合材料的分解温度升高了73 。
