硅烷偶联剂改性水性聚氨酯胶黏剂

以聚已二酸-1,4-丁二醇酯（PBA2000）、甲苯二异氰酸酯（TDI）、二羟甲基丙酸（DMPA）和一缩二乙二醇（DEG）为原料合成了一种聚氨酯预聚体,通过在预聚体中引入可室温交联的硅烷偶联剂,制备得到了一种单组份自交联的水性聚氨酯胶黏剂。探讨了硅烷偶联剂加入方式,用量对乳液及胶膜性能的影响。结果表明：当硅烷偶联剂用量为预聚体质量分数的1.5%时,胶黏剂对塑料薄膜PET/CPP的粘接强度显著提高,由改性前的1.3N/15mm增大至1.7N/15mm;复合薄膜经过沸水煮后,T剥离强度由1.0N/15mm变为1.5N/15mm。     

聚氨酯改性TDE-85/MeTHPA环氧树脂体系的结构表征

选用聚醚二元醇(PPG)和甲苯二异氰酸酯(TDI)为原料,合成聚醚型聚氨酯预聚体。采用该聚氨酯预聚体(PUP)、扩链剂、交联剂对TDE-85/甲基四氢邻苯二甲酸酐(MeTHPA)环氧树脂进行改性,通过扫描电镜与红外光谱分析,探讨聚氨酯(PU)改性环氧树脂(EP)体系的结构特征。结果表明:TDE-85与MeTHPA之间发生固化反应,形成环氧聚合物网络Ⅰ;1,4-丁二醇(1,4-BDO)及三羟甲基丙烷(TMP)与PU预聚体之间发生了扩链、交联反应,形成聚氨酯聚合物Ⅱ;PU改性TDE-85/MeTHPA树脂为非均相结构,PU含量是影响PU/EP材料两相相容性和相区尺寸的主要因素;当添加的PUP质量分数为15%时,PU改性TDE-85/MeTHPA体系具有互穿聚合物网络结构特征。     

氨基硅油改性丁羟聚氨酯的合成与性能

以端羟基液体聚丁二烯（HTPB）、氨乙基氨丙基聚二甲硅氧烷（AEAPS）、异佛尔酮二异氰酸酯（IPDI）为原料制备预聚体，利用多元胺（MOCA）为固化剂，合成一系列氨基硅油改性的聚氨酯，测试了材料的力学性能、动态力学性能、表面水接触角，同时对材料进行了ESCA表面分析。结果表明：HTPB－IPDI型聚氨酯具有优良的力学性能；改性后的聚氨酯硅氧烷在表面富集，具有较低的表面张力，而其力学性能变化不大。     

聚氨酯预聚体熔融改性水溶性壳聚糖的制备及其结构性能研究

以水为增塑剂,聚氨酯预聚体为改性剂,成功在密炼机中改性水溶性壳聚糖,并对改性后材料的结构及性能进行了测试.结果表明,聚氨酯预聚体与壳聚糖之间有很强的相互作用,材料的柔韧性随着聚氨酯含量的增加而提高;同时,随着聚氨酯预聚体含量的增加,材料的吸附性能逐步降低,说明在改性的过程中,部分氨基参与了反应.由于密炼之后,得到的材料是一种热塑体,因此可以使用加工设备对其进行二次加工(膜压,发泡等),扩大了壳聚糖材料的使用范围.该工作为壳聚糖材料的改性提供了一种新的加工方法.     

聚氨酯／石墨烯纳米复合物的制备、力学及温度-电阻率行为研究

采用改进的hummers法,并以NaBH4还原制得还原石墨烯（RGO）．以蓖麻油（CO）和2,4-甲苯二异氰酸酯（2,4-TDI）为原料合成蓖麻油基聚氨酯预聚体．利用原位聚合法将聚氨酯预聚体与还原石墨烯反应（不完全还原）,制得不同石墨烯含量的聚氨酯／石墨烯纳米复合物．采用x线衍射、傅里叶变换红外光谱、拉曼光谱、热重分析以及力学和热-电阻特性测试对复合物薄膜的结构和性能进行研究．实验结果显示聚氨酯／石墨烯复合物薄膜具有优良的热力学性能,特别是当石墨烯质量分数为1．5％时,聚氨酯／石墨烯纳米复合物出现正的电阻率-温度效应（PTC效应）．     

纳米TiO2增强聚氨酯弹性体的制备及力学性能

以聚四氢呋喃醚二醇,甲苯-2,4-二异氰酸酯,3-二氯-4,4-二苯基甲烷二胺为原料,采用预聚法合成聚氨酯弹性体,并选用纳米TiO2对聚氨酯弹性体进一步增强,通过对纳米TiO2的表面改性及超声波分散处理来促进纳米粒子在基体中更好地分散,研究预聚体合成温度、-NCO的质量分数W_NCO、纳米TiO2含量及超声波分散对复合材料力学性能的影响.结果表明,纳米TiO2对聚氨酯弹性体的力学性能有一定的提高,通过SEM观察纳米TiO2在弹性体中发生团聚或附聚现象.     

有机硅改性聚氨酯预聚体的制备及表征

以聚己二酸乙二醇酯、甲苯-2．4二异氰酸酯、二元醇、羟基硅油为主要原料，合成有机硅改性聚氨酯密封剂预聚体。用红外光谱法对其结构进行表征，同时测定预聚体的物理性能。结果表明．合成的聚氨酯密封剂预聚体受环境温度、空气湿度影响小，存放时间长，因此提高了密封胶力学性能。     

聚硅氧烷改性水性聚氨酯的合成及应用

以聚四亚甲基醚二醇、异佛尔酮二异氰酸酯(IPDI)、DMPA、1,4-丁二醇(BDO)制备聚醚型水性聚氨酯预聚体.采用氨基硅油(AEAPS)对预聚体进行改性制得聚硅氧烷改性水性聚氨酯乳液和薄膜.采用红外光谱(FT-IR)、强力测试、乳液粒径测试、吸水率和接触角对聚氨酯的结构和性能进行表征.采用聚硅氧烷改性聚氨酯乳液对羊绒织物进行整理,测试其抗起毛起球效果.结果表明,氨基硅油改性能够明显改善聚氨酯膜的耐水性和机械强度,经过整理的羊绒织物的起毛起球效果有一定的提高.     

亲水性PU预聚体对PU/水玻璃注浆材料的增容性研究

以MDI-50和PEG400为单体合成端NCO的亲水性聚氨酯预聚体,利用预聚体制备改性PU/水玻璃双组分杂化注浆材料.对注浆材料固结体的力学性能和断面形貌进行表征,结果显示,亲水性预聚体对聚氨酯/水玻璃两相的相容性改善明显,注浆材料的黏结、拉伸、冲击强度显著提升.结合预聚体黏度综合考虑,以nNCO/nOH为2时合成得到的预聚体,添加量w为25%时,浆液黏度较低,流动性好,且固结体的综合力学性能最佳,其中黏结强度为4.32 MPa,冲击强度为16.9kJ·m~(-2).     

端羟基聚d,l-乳酸及d,l-乳酸-ε-己内酯共聚物预聚体的合成

文中研究了端羟基聚d,l-乳酸及d,l-乳酸-ε-己内酯共聚物预聚体的合成方法以及反应温度、单体比、催化剂用量等对预聚体结构的影响.结果表明预聚体合成的最佳反应条件为:n(LA)/n(CL)=8/2,θ=195℃,催化剂质量分数0.3%,还原剂质量分数0.1%,总反应时间31 h.在该反应条件下可合成出结构明确、酸值较为理想、可满足进一步扩链要求的端羟基预聚体.并用羟值分析和GPc等对产物进行了表征.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.