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通过动态力学参数温度谱,研究了尼龙1010/6、尼龙1010/66两个共聚物系列的动态力学参数与组成的关系。研究表明尼龙1010/6、尼龙1010/66在测试温度范围内出现三个明显的松驰转变:α、β、γ,其中各共聚物的β、γ松驰温度相差不大,而α松驰温度随组成改变有明显改变。一般均聚物的α松驰温度较高,共聚物的α松驰温度均低于均聚物,二个系列以尼龙1010/6(29.8/70.2)、尼龙1010/ 相似文献
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热处理对尼龙1010结构影响研究 总被引:2,自引:0,他引:2
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. 相似文献
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采用DCS、POM、SEM及力学性能测试,研究了不同对羟基苯甲醛和对苯二甲酸乙二醇酯含量的液晶共聚酯PET40/PHB60(LCP1)和PET30/PHB70(LCP2)的共混物与尼龙1010为基体的三元混体系。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 相似文献
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尼龙1010非等温结晶动力学与机理研究 总被引:3,自引:0,他引:3
尼龙1010非等温结晶动力学与机理研究朱诚身,王经武,李卓美(郑州大学材料工程系郑州450052)(中山大学高分子研究所广州510275)关键词尼龙1010,非等温结晶动力学,结晶机理,动力学结晶能力尼龙1010的结晶动力学,无论是等温还是非等温,研... 相似文献
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不同分子量初生态尼龙1010的熔融 总被引:1,自引:0,他引:1
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,其原因主要高规整度晶体量减少所致。 相似文献
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尼龙-6和尼龙-6合金的球晶结构与破坏性能的研究 总被引:2,自引:0,他引:2
成型冷却速度即结晶速度对单纯尼龙 6和尼龙 6合金的拉伸破坏性能具有不同的影响.结晶速度慢,球晶尺寸大,单纯尼龙 6的拉伸破坏强度高,破坏形变和破坏能量减小;尼龙 6/热塑性聚酰胺弹性体/增容剂合金不仅拉伸破坏强度高,而且破坏形变和破坏能量都有所增加.研究表明,虽然球晶尺寸影响尼龙 6的破坏性能,但球晶的性质即球晶的界面上和片晶 片晶间的非晶部分结构、微小分散粒子的空洞化及相与相之间的界面结合强度是影响尼龙 6破坏性能的主要因素. 相似文献
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刚性粒子增韧尼龙1010体系的研究 总被引:3,自引:0,他引:3
采用扫描电镜和动态力学等研究了在磺化聚苯乙烯(HSPS)作用下,尼龙1010(PA1010)/聚苯乙烯(PS)共混物的形态及相容性。结果表明,HSPS的加入显著改善了PS与PA1010的相容性,加强了界面粘结,使共混物缺口冲击明显提高,实现了PS增韧PA1010的目标。偏光显微竟结盟表明,HSPS的加入对共混物中PA1010的结晶形态有明显影响,使PA1010球晶细化且不完善。 相似文献
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采用近红外光谱技术和二维相关分析法研究尼龙1010膜在升温过程中的结构变化. 为了排除非晶区域酰胺基团的影响, 事先对尼龙1010的样品膜进行了氘代, 并测量了其最终氘代率. 结果证明, 尼龙1010的结晶区域在升温过程中被逐渐破坏, 首先是其主链碳氢结构发生调整, 进一步影响到结合酰胺, 导致氢键作用减弱并最后生成自由胺基. 相似文献
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尼龙1010环状球晶的研究 总被引:4,自引:0,他引:4
利用偏光显微镜研究了尼龙1010环状球晶的生成条件、形态特征和光学性质,发现在等温结晶过程中只可生成环状球晶;在降温过程中可由相同光性的放射状球晶转变成正、负、混合光性环状球晶;在升温过程中正光性和混合光性环状球晶分别转变成不对称四瓣形和六瓣形环状球晶,负放射球晶可转变成另一种负环状球晶。 相似文献
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Nylon 6 and nylon 6,6 reaction equilibria depend in a complex way on water concentration and temperature. For example, data sets from six research groups reveal that the apparent equilibrium constant for polycondensation increases with water at low water concentrations, reaches a maximum, and then decreases as the water concentration rises further. In this article, semi‐empirical expressions are proposed to describe the experimentally observed equilibrium behavior for the five main reactions that occur during nylon 6 and nylon 6,6 polymerization. Nine side reactions involving amidine ends, cyclopentanone ends, and hydrated carboxyl ends are used to develop expressions that account for the influence of both water and temperature on these equilibrium constants. Excellent fit to the data, over the entire range of the available nylon 6 and nylon 6,6 literature data, suggests that the proposed equations will be helpful for modeling reaction equilibria for nylon 6/6,6 copolymerization. 相似文献
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本文介绍了尼龙1010的结晶过程与动力学、晶体的熔融与转化;并论述了其稀溶液、热降解与动态力学性质及共聚、共混、填充、增强、交联改性方面的研究进展。 相似文献
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Jae‐Yong Jeong Hwa‐Jeong Lee Sang‐Wook Kang Loon‐Seng Tan Jong‐Beom Baek 《Journal of polymer science. Part A, Polymer chemistry》2008,46(18):6041-6050
Pristine multiwalled carbon nanotubes (P‐MWNTs) were functionalized with 4‐chlorobenzoic acid via “direct” Friedel‐Crafts acylation in polyphosphoric acid (PPA)/phosphorous pentoxide (P2O5) medium. The resultant 4‐chlorobenzoyl‐functionalized MWNTs (F‐MWNTs) were soluble in chlorinated solvents such as dichloromethane, chloroform, and carbon tetrachloride. A large scale of nylon 610/F‐MWNT composite could be conveniently prepared by in situ interfacial polymerization of 1, 6‐hexamethylenediamine (HMDA) in an aqueous phase, and sebacoyl chloride with F‐MWNTs in an organic phase. Similarly, nylon 610/P‐MWNT composite was also prepared for comparison. The state of F‐MWNTs dispersion in nylon 610 matrix was distinctively better than that of P‐MWNTs, which could be clearly discerned by both naked eye and scanning electron microcopy (SEM). As a result, the tensile strength of nylon 610/F‐MWNT composite was 4.9‐fold higher than that of nylon 610/P‐MWNT composite. © 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 6041–6050, 2008 相似文献
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Nylon 6 and 6,6 literature data are collected over a wide range of water concentrations and temperatures (0 ≤ [W]0 ≤ 40.8 wt%, 200 ≤ T ≤300 °C) and used to fit parameters in an updated batch reactor model. The resulting copolymerization model uses side reactions to account for the complex influence of water on kinetics and reaction equilibria. The proposed parameter estimates result in a significant improvement in the fit to the data, corresponding to a 73% reduction in the weighted‐least‐squares objective function compared to when the parameters of Arai et al. are used. Copolymerization simulations are conducted at industrially relevant conditions, shedding light on the complex influence of water and on the potential to include waste nylon 6 cyclic dimer in the feedstock. The model and parameter estimates will be helpful in future models of nylon 6/6,6 copolymerization in continuous reactor systems. 相似文献