LDMOS的局部电热效应分析

分析了LDMOS (lateral DMOS）在一次雪崩击穿后的局部电热效应. 提出并证明了等温分析和电热分析分别得到的LDMOS的触发点是不同的；分析了局部晶格温度在空间上的分布特点;并提出晶格温度弛豫时间会影响漏极电压弛豫时间.从而证明LDMOS工作于ESD (electro-static discharge）保护的大电流区时，电热分析比等温分析的模拟结果与实验结果符合得更好.     

废聚苯乙烯综合利用的研究——PSF粘合剂的制备

本论文以TG和TDA等热分析方法研究各种溶剂对PSF粘合剂粘接效果的影响,实验结果指出乙酸乙酯的改性效果明显地优于各种非极性的有机溶剂。     

Chemical,chromatographic, and thermal analysis of rosemary (Rosmarinus officinalis)

Rosemary (Rosmarinus officinalis) is mainly known for its cooking qualities, but it possesses an essential oil with pharmacological properties. Moreover, this plant was the start of forest fires in Provence, France. The presence of biopolymers can contribute to electrical energy production by biomass combustion. The aim of this work was to study a stalk of rosemary during its biological cycle (November 1998 to June 1999). The chemical analysis (water, mineral ashes, cellulose, lignin, holocellulose, and extractives) showed few variations during this period. Leaves and branches differentiated themselves according to their chemical composition. Analyzed by chromatography gas–liquid chromatography/mass spectroscopy (GC‐MS) and gas–liquid chromatography/flam ionization detector (GC‐FID), the essential oil of this rosemary had a high level of camphor (30–45%), which could be used in new therapeutics (cardiac and respiratory analeptic). Finally, the simultaneous thermal analysis (DTA‐TG) was run on the fresh plants and the dried powdered samples. Several kinetic constants of the biopolymers had been computed: activation energies of cellulose and holocellulose. During heating, the rosemary's lignin decomposed more than others plants, thereby increasing the fire risks. The chemical, chromatographic, and thermal analysis run on the rosemary could be applied on other species in the Mediterranean basin. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 83: 747–756, 2002     

Kinetics of the thermal decomposition of green alga Ulva by thermogravimetry

In this article, we present the findings of our study into the thermal decomposition of the alga Ulva, which can cause serious problems due to its proliferation in certain seas. Its use as a human foodstuff or other similar applications is limited; however, it could be used as a filling or reinforcement material in the manufacture of composite materials. Since the production processes of such materials usually require heating, the thermal stability of this polymeric material needs to be known, and this is the objective of this work. For this reason, we have studied the thermal decomposition in an air atmosphere using thermogravimetry (TG). On the one hand, we evaluated the thermal stability temperatures of the seaweed; and on the other, we determined the kinetic parameters of the alga's two main decomposition reactions, using an n‐order integral kinetic model. It was, therefore, necessary to calculate the best order of reaction. Finally, we determined a series of characteristic temperatures related to the beginning and the end of each of the thermal decomposition reactions. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 1913–1922, 2004     

超导体MgB2的高温电阻率及热重-差热分析

利用Mg扩散法制备出单相多晶的MgB2 超导体 ,其超导转变的零电阻温度为 3 8 4K左右 ,转变宽度小于 1K。正常态电阻率温度关系为金属型 ,在 2 70K -4 5 0K的高温范围内电阻率与温度成很好的线性关系。差热和热重分析表明在空气气氛中MgB2 在 90 0℃左右开始急剧氧化。     

用TG-FTIR研究TNT的热分解

用ＴＧＦＴＩＲ技术研究了２，４，６三硝基甲苯（ＴＮＴ）在高纯氮气和等速升温（１０℃／ｍｉｎ）条件下的缓慢热分解行为，测定了分解气体产物的组成。实验表明ＴＮＴ在２２４．１６℃时分解速度达到最大，其主要分解产物为１，３，５三硝基苯和ＣＯ２。由此推断的ＴＮＴ缓慢热分解过程、步骤以及ＴＮＴ的热分解机理与Ｓｈａｃｋｅｌｆｏｒｄ报道的一致。     

TLCP/PPS 原位成纤共混纤维的非等温结晶动力学

 通过熔融纺丝法制备热致性液晶（TLCP）/聚苯硫醚（PPS）原位成纤共混纤维,TLCP微纤的形成将有效增强PPS基体的力学性能,并能优化纺丝工艺。考虑到实际纺丝过程是一个非等温结晶过程,因而首先研究了共混纤维的非等温结晶动力学行为。采用差示扫描量热仪（DSC）,通过非等温结晶方法研究了TLCP微纤对PPS基体结晶行为的影响,并用Jeziorny模型描述了非等温动力学。研究表明,TLCP/PPS原位成纤共混纤维的非等温结晶动力学过程能够使用Jeziorny模型来描述。在共混过程中,TLCP微纤结构起到异向成核的作用,提高结晶速率和结晶温度,降低半结晶时间。此外,采用扫描电镜（SEM）观察了挤出共混物表面形貌及共混纤维的TLCP微纤结构。     

纳米二氧化硅／MC尼龙6原位复合材料非等温结晶动力学

通过阴离子开环聚合法制各纳米二氧化硅／MC尼龙6原位复合材料,采用差示扫描量热法研究MC尼龙6及其原位纳米复合材料非等温结品行为,并利用修正Avrami方程的Jeziomy和Liu的方法进一步处理原位纳米复合材料的非等温结晶动力学,结果表明在纳米二氧化硅／MC尼龙6原位复合材料中,纳米二氧化硅对基体MC尼龙6的结晶有一定的成核作用,并提高了其结品速率。     

脱氢枞酸的非等温热分解动力学?

采用TG-DTG热分析方法,在5、10、15和20 K·min-1线性升温条件下,研究了脱氢枞酸在氩气气氛中的热分解反应动力学.分别运用Kissinger法、Flyrm-Wall-Ozawa法对脱氢枞酸非等温热分解动力学数据进行了分析,同时运用Satava-Sestak法研究了脱氢枞酸的热分解机理.结果表明,脱氢枞酸的热分解机理为随机成核和随后生长机理,热分解反应的表观活化能为93.14 kJ·mol-1,指前因子为3.72×107s-1,反应级数为1级,并按这些参数写出了其反应动力学方程.     

吡啶离子液体的热分析研究

本文采用两步合成法合成了氯代丁基吡啶三氯化铝离子液体(bpc/AlCl3),对中间产物氯化丁基吡啶(bpc)进行了TG-DSC测定,对合成的不同酸性的离子液体进行了TG-DTA热分析研究,考察了离子液体的热稳定区间。热分析研究表明吡啶离子液体在呈液态的范围内蒸汽压很低,几乎不挥发,吡啶离子液体的稳定区间为室温到250℃左右,明显高于其它常规有机溶剂,对于一般的工业应用已经足够。