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排序方式: 共有175条查询结果,搜索用时 15 毫秒
1.
Antonio Sanchez‐Solis Andres Garcia‐Rejon Mirna Estrada Antonio Martinez‐Richa Guadalupe Sanchez Octavio Manero 《Polymer International》2005,54(12):1669-1672
The production and properties of blends of poly(ethylene terephthalate) (PET) and poly(ethylene naphthalene 2,6‐dicarboxylate) (PEN) with three modified clays are reported. Octadecylammonium chloride and maleic anhydride (MAH) are used to modify the surface of the montmorillonite–Na+ clay particles (clay–Na+) to produce clay–C18 and clay–MAH, respectively, before they are mixed with the PET/PEN system. The transesterification degree, hydrophobicity and the effect of the clays on the mechanical, rheological and thermal properties are analysed. The PET–PEN/clay–C18 system does not show any improvements in the mechanical properties, which is attributed to poor exfoliation. On the other hand, in the PET–PEN/clay–MAH blends, the modified clay restricts crystallization of the matrix, as evidenced in the low value of the crystallization enthalpy. The process‐induced PET–PEN transesterification reaction is affected by the clay particles. Clay–C18 induces the largest proportion of naphthalate–ethylene–terephthalate (NET) blocks, as opposed to clay–Na+ which renders the lowest proportion. The clay readily incorporates in the bulk polymer, but receding contact‐angle measurements reveal a small influence of the particles on the surface properties of the sample. The clay–Na+ blend shows a predominant solid‐like behaviour, as evidenced by the magnitude of the storage modulus in the low‐frequency range, which reflects a high entanglement density and a substantial degree of polymer–particle interactions. Copyright © 2005 Society of Chemical Industry 相似文献
2.
聚萘二甲酸乙二醇酯(PEN)的研究及发展 总被引:8,自引:0,他引:8
综述了聚萘二甲酸乙二醇酯(PEN)的发展历史,合成工艺,应用领域及其与PET的性能比较。 相似文献
3.
用热失重(TGA)、X射线(WAXS)和偏光显微镜(PLM)研究了三种成核剂对聚对苯二甲酸乙二酯/聚萘二甲酸乙二醇酯(PET/PEN)共混体系的热降解行为、结晶行为和形态的影响。结果表明,成核剂的加入,加速了PET/PEN共混物的降解;且DBS[1,3:2,4-二(亚苄基)-D山梨醇]对PET/PEN共混物的影响最大,CaCO3对PET/PEN共混物的影响最小;含有DBS的PET/PEN共混物形成了环带球晶,CaCO3与PET/PEN共混物同时结晶,且成核剂的加入使晶体形态更完善。用差减微分法研究了PET/PEN/成核剂共混体系热降解动力学,计算得到了活化能(E)和反应级数(n),计算得到的活化能关系为EPET/PEN>EPET/PEN/DBS>EPET/PEN/CaCO3>EPET/PEN/SB。 相似文献
4.
聚酯啤酒瓶研发现状及应用展望 总被引:1,自引:0,他引:1
综述了近年国外对聚对苯二甲酸乙二酯和聚萘二甲酸乙二酯啤酒瓶的开发和应用,讨论了两者的利弊。指出由于聚萘二甲酸乙二酯啤酒瓶性能优越,可回收并且生产成本有望大幅度降低,是今后塑料啤酒瓶的主流。 相似文献
5.
介绍了集成电路制造用的电子气体中粒子控制规范,供气系统用的材料及其处理技术,供气管路和配件技术,粒子过滤及计数技术。 相似文献
6.
PEN系树脂的中空吹塑 总被引:7,自引:0,他引:7
本文通过PEN与PET比较,介绍了PEN树脂的特点,中空吹塑技术及其发展趋势。 相似文献
7.
This work presents an experimental analysis of circular-planar type intermediate-temperature solid oxide fuel cells, and the interpretation of the experimental results with a finite volume model. The model is developed to generate cell mass and energy balances and internal cell profiles for all the relevant thermodynamic or electrochemical variables, and includes a fluid-dynamic analysis focusing on the investigation of the cell internal flow conditions. Experiments have been carried out at the Edison laboratories, where several single cells fuelled with hydrogen were subject to polarization curve analysis and internal temperature measurements. The model is calibrated and validated over experimental voltage–current data, provides information on cell internal losses and demonstrates the capacity of predicting the single cell behavior and overall energy balances when changing significantly the cell operating conditions. The discussion also addresses the effects of diffusion losses appearing in the experiments carried out at high current output and low fuel hydrogen content. 相似文献
8.
C. Gourgon G. PhilippotS. Labau J.H. TortaiM. Benwadih J. Bablet 《Microelectronic Engineering》2011,88(8):1959-1963
Nanoimprint lithographies (NIL) are very promising for NIL applications on flexible plastic films. In this paper we present some studies and developments of the imprint of polyethylene naphthalate (PEN) films. Different NIL processes are developed successfully; they correspond to the imprint of different chemical phases of the material: semicrystalline, amorphous, and melt. The thermal properties of the film are analyzed, and related to imprint results, which demonstrate that high reproducibility and uniformity are obtained. Moreover, the imprint of such flexible films is much more promising since it avoids NIL limitations commonly observed on semiconductor substrates. 相似文献
9.
聚酯啤酒瓶现状及展望 总被引:1,自引:0,他引:1
综述了近年国外对PET,PEN啤酒瓶的开发和应用,讨论了两者的利弊,指出由于PEN啤酒瓶性能优越,可回收并且生产成本有望大幅度降低,是今后塑料啤酒瓶的主流。 相似文献
10.