158 resultados para AISI 1010


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用DSC以及凝胶含量测定的方法研究了辐照聚酰胺1010的后效应,讨论了晶区分子运动与转变受辐射后效应的影响,也探讨了结晶表面积对后效应的影响。结果表明辐射后效应主要来源于结晶表面内的俘陷自由基。

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利用DSC方法研究了熔体聚合不同分子量初生态尼龙1010样品的熔融,发现随分子量增大,熔点有极大值,高规整性晶体的量也呈极大值,且两者峰值相同;结晶度则逐渐减小;熔融热、熔融熵也逐渐减小;其原因主要是高规整度晶体量减少所致。

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采用WAXD,SAXS方法研究了热处理对尼龙1010聚集态结构的影响.结果表明,在温度为175℃左右对样品进行退火处理可获得较完善的结晶.利用Wc.x~T关系曲线外推法得到尼龙1010样品的Tg大约为58℃.根据一维电子密度相关函数法求得了系列样品在所研究条件下的结晶片层厚,过渡层厚,长周期和结晶非晶相间的密度差.得到了不同退火条件尼龙1010样品的结晶相密度ρc.

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不同分子量尼龙1010的结晶与熔融*朱诚身王经武王友文杨桂萍(郑州大学材料工程系郑州450052)陈玉莫志深(东北师范大学分析测试中心长春130024)(中国科学院长春应用化学研究所长春130022)关键词尼龙1010,分子量,结晶,熔融*1994_...

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离子聚合物在Nylon-1010/PP共混物中的增容作用曲桂杰,刘景江(中国科学院长春应用化学研究所长春130022)关键词聚丙烯,Nylon-1010,离子聚合物,增容选择离子聚合物作为高聚物共混的增容剂,通过离子间的相互作用可达到增容效果[1]。...

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用反应挤出方法制备了聚丙烯接枝丙烯酸(PP—g—AA)。用电子显微镜观测了不同PP—g—AA含量的PA1010/PP/PP—g—AA三元共混物的形态。与没有加PP一g—AA的共混体系相比,增容共混中分散相尺寸明显减小,两相间镶嵌更深。PP—g—AA作为第三组分加入对其物理力学性能有一定程度的改善。热分析结果表明三元共混体系中尼龙1010的结晶行为发生明显变化。

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The influence of gamma-radiation on polyamide 1010 aggregate structures and crystal damage were examined by using wide angle X-ray diffraction (WAXD) and small angle X-ray scattering (SAXS) techniques. The results revealed that some structural parameters of the aggregated state, the density differences and the degree of crystallinity W-c,W-x, essentially decreased with increasing radiation dose, but the specific surface O-s increased. Crosslinking and scission of irradiated polyamide 1010 samples occurred mainly in amorphous and interphase regions, and crystal damage and amorphization induced by gamma-radiation spread from the interphase and extended into the crystal phase with increasing radiation dose. This result also indicated that the (010) reflection with the hydrogen bond was more susceptible to the action of radiation.

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The structural parameters of the aggregated state under various heat treatment for PA-1010 samples were computed by means of the desmearing intensity from SAYS, and by using the concept of the distance distribution function and 1D EDCF method. The results revealed that the maximum values of Q, I(0), P-max(Z), dtr, Rg and W-c,W-x were obtained nearby T=175 degreesC for PA-1010 samples with various annealing treatment. The higher degree of the crystallinity, the greater values of all the structural parameters of the aggregated state for PA-1010 samples were.

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利用偏光显微镜(PLM),差示扫描量热计及广角X-射线衍射等手段研究了热致液晶共聚酯/Nylon-1010共混体系.发现当热致液晶共聚酯(HTH10)含量达到30%时共混物微结构与纯HTH10相似.尼龙-1010的结晶度先是随HTH10含量增加而增加,随后又随之下降,但其结晶温度却随HTH10加入而单调下降,共混物的熔融热焓△Hm在HTH10含量为30%时与计算值有较大的偏差,广角X-射线衍射结果表明,此时共混物结构发生了较为明显的变化,两组份之间在此时存在一定的相互作用.

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在自制单螺杆小型挤出机上通过熔融共混的办法,制备了不同配比(5/95—25/75)的EC/Nylon—1010共混物.用WAXD、DSC、毛细管流变仪、力学性能测试等方法对共混物进行了研究.发现共混后尼龙-1010的形态结构有明显改变,其强度、模量都有提高,在高剪切速率下,共混物粘度大大降低.配比为1585时,这些性能的改进尤为明显.

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在过氧化二异丙苯(DCP)的引发下,用反应挤出的方法制备了乙丙共聚物接枝甲基丙烯酸环氧丙酯(EPM-g-GMA).用Brabender单螺杆挤出机制备了不同组成的EPM/尼龙1010及EPM-g-GMA/尼龙-1010的共混物.用电子显微镜观察了不同共混组成的形态.与EPM/尼龙1010共混体系相比,EPM-g-GMA/尼龙1010体系中EPM在尼龙1010中分散相尺寸明显降低,EPM-g-GMA的加入对该共混体系的物理机械性能有明显改善.

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采用DSC、POM、SEM及力学性能测试,研究了不同对羟基苯甲酸(PHB)和对苯二甲酸乙二醇酯(PET)含量的液晶共聚酯PET40/PHB60(LCPI)和PET30/PHB70(LCP2)的共混物与尼龙1010为基体的三元共混体系,结果表明,液晶共混物的力学性能比单组分有明显提高,通过改变混合液晶中两种组分的含量可调节其加工温度与粘度,从而满足了与尼龙1010共混的加工窗口要求。混合液晶的加入对尼龙1010的结晶与熔融行为无多大的影响。因缺乏必要的拉伸流动,共混物中液晶相取向较差,力学性能提高不明显.

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Radiation effects on polyamide-1010 specimens having various states of aggregation were studied using wide angle X-ray diffraction, electron spin resonance, calorific and sol measurement techniques. Experimental results indicated that chain crosslinking

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尼龙1010(以下简称PA1010)是半结晶聚合物。我们采用不同浓度的成核剂,通过淬火和退火的方法制备了不同微晶尺寸的试样,用~(60)Coγ—射线进行辐照,利用ESR方法研究其交联和裂解反应的机理。

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用WAXD、DSC、方差-范围函数.密度测量等方法,研究了经不同热处理的尼龙-1010的聚集态结构.发现退火处理更有利于尼龙-1010结晶的生成和稳定,且尼龙-1010的结晶,有一个最佳的热处理温度.在该温度附近,尼龙-1010的结晶度和微晶尺寸里最大值.