- 結(jié)晶程度
- 結(jié)晶度程度
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degree of crystallinity中文什么意思
例句與用法
- The degree of crystallinity can be increased by annealing in an inert atmosphere .
結(jié)晶度可通過在惰性氣體中的退火處理來提高。 - Because chitin has a high degree of crystallinity , it can only be dissolved in expensive organic solvents
摘要由于天然甲殼素結(jié)晶度高，在濕法紡絲過程中溶解甲殼時(shí)需要使用價(jià)格較高的有機(jī)溶劑。 - The crystallization property were investigated by dsc . it was shown that the joining of ommt has a little effect on melting point of pp , the crystallization temperature of pp was improved obviously and the degree of crystallinity was increased ; through studying on kinetics of isothermal crystallization , the constant ( k ) of crystallization speed and crystallization speed ( g1 / 2 ) were lowered with rising of crystallization temperature ; half period of crystallizations and ( tp ) were delay with rising of crystallization temperature
Dsc研究結(jié)晶行為表明：有機(jī)蒙脫土的加入對(duì)pp熔點(diǎn)的影響不大，使pp的結(jié)晶溫度明顯提高，結(jié)晶度增大；通過等溫結(jié)晶動(dòng)力學(xué)的研究，結(jié)晶速率常數(shù)k和結(jié)晶速率g _ ( 1 2 )均隨結(jié)晶溫度的升高而降低；半結(jié)晶期t _ ( 1 2 )和t _ p都隨結(jié)晶溫度的升高而延長(zhǎng)。 - The degrees of crystallinity of pure ptfe under the different conditions of water cooling , air cooling and furnace - varying cooling were made comparison by xrd . the thermal stability of pure ptfe and solid lubricant was analyzed by dsc - tg ; the composition and valence state of elements in the surface of carbon fiber , solid lubricant before and after friction test and lubricant transfer film were characterized by xps ; the frictional property of solid lubricant was tested by pin and disk test rig . the frictional wear property of solid lubricant between embedded bearing sleeve and steel axle friction pair ring was tested by special simulate test machine , the hardness of solid lubricant was tested by pm ; the compression strength of solid lubricant was tested by material test machine
用sem表征原料微觀結(jié)構(gòu)、摩擦表面及潤(rùn)滑轉(zhuǎn)移膜表面形貌：用xrd進(jìn)行原料物相分析，及比較水冷卻、空氣冷卻、隨爐冷卻三種工藝條件下的純聚四氟乙烯樹脂的結(jié)晶度；用dsc - tg分析純聚四氟乙烯樹脂及固體潤(rùn)滑劑的熱穩(wěn)定性；用xps表征碳纖維表面、固體潤(rùn)滑劑摩擦前后表面、潤(rùn)滑轉(zhuǎn)移膜表面的元素組成、價(jià)態(tài)變化；用銷盤式摩擦磨損試驗(yàn)機(jī)對(duì)固體潤(rùn)滑劑進(jìn)行摩擦性能測(cè)試；采用專用的臺(tái)架模擬試驗(yàn)機(jī)對(duì)固體潤(rùn)滑劑鑲嵌軸承套與鋼軸摩擦副間的摩擦磨損性能進(jìn)行測(cè)定；用萊次偏光顯微鏡( pm )測(cè)試固體潤(rùn)滑劑的硬度；用材料試驗(yàn)機(jī)測(cè)試固體潤(rùn)滑劑的抗壓強(qiáng)度等。 - 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
試驗(yàn)結(jié)果表明：所選原料的尺寸、形狀及純度可滿足固體潤(rùn)滑劑的性能要求；聚四氟乙烯樹脂熱分解溫度超過400 ，但在ptfe中加入無機(jī)填料會(huì)使復(fù)合材料吸水率提高，熔融溫度及分解溫度降低，且伴有氧化分解反應(yīng)；碳纖維表面含有c = o及c - o - c等極性基團(tuán)，有利于提高其與其它組分的相容性，提高層間剪切強(qiáng)度；均勻設(shè)計(jì)試驗(yàn)方法能夠用較少的試驗(yàn)次數(shù)找出配方與摩擦性能間的關(guān)系，擬合曲線基本能表示各配方的摩擦系數(shù)發(fā)展趨勢(shì)；配方中不加銅粉或不加石墨，其摩擦系數(shù)均較高，說明銅粉和石墨應(yīng)該配合使用；當(dāng)銅粉15份、石墨60份時(shí)，銅粉30份、石墨30 - 40份時(shí)，銅粉60 、石墨15 - 30份時(shí)，摩擦系數(shù)均具有較低值；純聚四氟乙烯樹脂在空氣冷卻時(shí)結(jié)晶度最大，磨損量也是三者中最大的；同時(shí)，固體潤(rùn)滑劑試樣在空氣冷卻時(shí)的磨損量也是三者中最大的：不論是固體潤(rùn)滑劑與45 #鋼軸配副或是固體潤(rùn)滑劑鑲嵌入銅套后與gcr15鋼軸配副，在金屬表面均可形成潤(rùn)滑轉(zhuǎn)移膜，從而減少金屬摩擦副表面間的直接接觸，大大延長(zhǎng)其使用壽命;轉(zhuǎn)移膜中主要含有較多的石墨、少量聚四氟乙烯、 moo 。