共聚聚丙烯EPF30R的结构性能表征及应用研究

准气相共聚聚丙烯产品EPF30R具有良好的力学性能和加工流动性，以其为基础树脂通过改性可制得多种性能符合要求的注塑产品。     

共聚聚丙烯EPF30R作汽车保险杠专用料研究

在共聚聚丙烯新产品EPF30R中加入少量的EPS30R为基体对脂，用POE（辛烯-乙烯共聚物）为增韧剂、PP-g-MAH为相容剂、滑石粉为填料制得性能符合要求的汽车保险杠专用料，并研究了增韧剂、相容剂、无机填料的含量对共混材料性能的影响。结果表明：EPF30R/EPS30R质量比为85/15，POE用量为15份，相容剂用量10份，无机填料为12份时，专用料的性能达到国内外同类产品的指标。     

聚丙烯蓄电池外壳专用料的研制

研究了β晶型成核剂用量对共聚丙烯EPF30R力学性能等的影响。结果表明：加入少量β晶型成核剂可使α晶型聚丙烯转变为β晶型聚丙烯，较大幅度地提高了冲击性能。将β晶型成核剂增韧改性的聚丙烯用于汽车蓄电池外壳的制造，取得了良好的应用效果。     

不同聚合工艺低融嵌段共聚聚丙烯产品结构性能研究

采用力学测试、偏光分析和扫描电镜分析等手段,分别对Spheripol、Novolen和Innovene三种不同工艺的低融嵌段共聚聚丙烯产品EPS30R、2500H和K8303进行了结构性能分析.结果表明:Novolen和Innovene气相法工艺,在聚合反应过程中,对产品的球晶尺寸和橡胶相分布具有很好的控制效果,能够通过降低球晶尺寸提高橡胶相的分散均匀性,有效提高产品的冲击性能.     

早孕因子的研究进展

早孕因子(Early pregnancy factor,EPF)是一种具有免疫抑制和生长因子特性的分泌性蛋白质,在受精后的孕血清及某些恶性肿瘤患者血清中均能检测到。EPF与伴侣素10(Chaperonin 10,Cpn10)是同源的。EPF首先通过玫瑰花结抑制试验在哺乳动物的孕血清中被发现。EPF单克隆抗体在妊娠诊断、肿瘤诊断和治疗等方面均有广阔的应用潜力。本文就EPF的来源、化学结构和生化特性、分离纯化及检测、作用及应用等研究进展作一综述。     

离子气相沉积镀铝技术研究

采用电弧离子镀设备在30CrMnSiA钢基体上进行离子气相沉积镀铝实验,研究了离子气相沉积镀铝的前处理、镀层沉积及后处理的工艺参数,并测试了铝镀层的各项性能。实验结果表明,镀铝前不同轰击处理参数对离子气相沉积铝镀层结合力影响不大,但采用清洗轰击可改善镀层外观质量,铝镀层结合力和耐腐蚀性能良好,大大高于锌镀层;镀层与7B04铝合金不发生接触腐蚀;离子气相沉积镀铝工艺对30CrMnSiA钢力学性能影响,不会引起氢脆;喷丸+铬酸盐处理后可以增强铝镀层的耐腐蚀性能。离子气相沉积镀铝层可以对30CrMnSiA钢基体起到很好的防护作用。     

聚丙烯生产工艺进展

综述了最近几年我国聚丙烯工业的发展现状。介绍了丙烯聚合工艺的研究和应用现状,对Basell公司的Spheripol环管／气相工艺、DOW化学公司的Unipol气相工艺、BP公司的Innovene气相工艺、NTH公司的Novolen气相工艺、三井公司的Hypol釜式本体工艺、Borealis公司的Borstar环管／气相工艺等进行了重点介绍。分析了我国在聚丙烯技术方面存在的差距,对我国聚丙烯工业的发展提出了建议。     

基于两种烧嘴的铜精炼阳极炉内燃烧过程数值模拟

基于CFD软件Fluent 6.3对装配两种型式烧嘴的铜精炼阳极炉内的燃烧过程进行数值计算,分析了炉内气相燃烧过程的特点.结果表明,装配I型烧嘴时,保温期炉内火焰峰值温度为2301 K,火焰长度为2.3R(R为炉体半径),氧化期炉内火焰峰值温度为2506 K,火焰长度为2.0R;装配II型烧嘴时,保温期炉内火焰峰值温度为2610 K,火焰长度为1.85R,氧化期炉内火焰峰值温度高达2800 K,火焰长度为1.82R.装配I型烧嘴的阳极炉内温度较均匀,能更好满足阳极炉精炼的工艺需求.烧嘴结构和天然气速度、环氧速度与侧氧速度对阳极炉内气相燃烧过程有明显影响.     

茂金属聚乙烯管材料mPE P3806R的工业化开发

在气相法聚乙烯装置上,采用专用茂金属催化剂和改进的工艺条件,以己烯为共聚单体,成功实现茂金属聚乙烯管材料mPE P3806R的工业化生产。通过凝胶渗透色谱仪和力学性能测试研究了mPE P3806R的结构和性能,并和国产同类产品进行对照。结果表明:mPE P3806R产品性能达到国产同类产品水平,满足耐热聚乙烯管材对原料的要求,具备放量生产的条件。     

聚丙烯共聚产品EPS30R质量影响分析

利用环管反应器串连气相反应器,同时加入少量丙烯、乙烯和氢气生产了共聚聚丙烯产品EPS30R,对产品结构性能进行了研究,找出影响产品的性能指标因素,为茂名乙烯聚丙烯共聚产品质量的提升和产品性能的进一步改进打下了坚实的基础。     

Influence of core–shell particles structure on the morphology and brittle‐ductile transition of PBT/ABS‐g‐GMA blends

The performance of glycidyl methacrylate (GMA) functionalized acrylonitrile‐butadiene‐styrene core–shell impact modifiers (R‐ABS) with varied GMA content, crosslinking degree of rubber phase, core–shell ratio, and initiator type in toughening of poly(butylene terephthalate) (PBT) was investigated. Results show that 1 wt% GMA is sufficient to induce a pronounced improvement of the impact strength of PBT and too much GMA induces the crosslinking of R‐ABS. Divinylbenzene improves the crosslinking degree of polybutadiene and decreases its cavitation ability. The brittle‐ductile transition shifts to higher R‐ABS content. When the core–shell ratio of R‐ABS is beyond 70/30, compatibilization reaction is not sufficient to retard the agglomeration of core–shell particles. R‐ABS particles with the core–shell ratio between 50/50 and 60/40 are suitable. Initiator type can influence the internal structure of R‐ABS. For R‐ABS prepared with azobisisobutyronitrile (AIBN) as initiator, big subinclusion structure decreases its toughening ability. R‐ABS prepared with redox initiator shows better toughening behavior. POLYM. COMPOS., 2013. © 2012 Society of Plastics Engineers     

Reaction induced phase separation in mixtures of multifunctional polybutadiene and epoxy

The phase behavior and separation dynamics have been investigated in blends of diglycidyl ether of bisphenol A (DGEBA), curing agent methylene dianiline (MDA), and a reactive liquid rubber (R45EPI) through application of differential scanning calorimetry (DSC), one- and two-dimensional light scattering, and optical microscopy. DSC analysis indicates that the system consists of three reactions: the self-condensations of DGEBA and R45EPI, as well as a cross-reaction between the two constituents. Observation of the dynamics of the 50/25.4/50 DGEBA/MDA/R45EPI system reveals that an initial phase separation is governed by the dominant self-curing reaction of DGEBA, followed by a phase dissolution characterized by a broadening of the interfacial regions catalyzed by a cross-reaction between the two species. A subsequent phase separation occurs at late stages since the copolymerization reaction does not proceed to completion. On the other hand, by changing the ratio of the beginning constituents to 70/25.4/30 DGEBA/MDA/R45EPI, the dissolution phenomena is not observed resulting from an even more dominant DGEBA/MDA condensation reaction. It is demonstrated that alterations in the initial compositional ratio greatly affect the phase separation dynamics of the system.     

柴油微乳液的相图及稳定性研究

选用双(2-乙基己基)琥珀酸酯磺酸钠(AOT)和辛酸(OA)作为表面活性剂制备柴油微乳液。体系中加入的混合表面活性剂总浓度为0.22mol/L。通过绘制R0-T相变图、研究微乳液体系在不同温度、不同乳化剂配比及不同水与甲醇比例时的相变化。实验结果表明:当AOT和OA的物质的量比为1∶1时,柴油微乳液W/O单相区域的面积最大。当温度为30℃,R0值小于22.5时,得到澄清透明的柴油微乳液。对于含有甲醇的体系,当水与甲醇体积比为2∶1时,相图中单相区域的面积最大。R0值小于15.1时,体系能够达到均匀稳定状态。使用AOT和OA作为表面活性剂可以制备澄清透明的柴油微乳液,样品放置64d后未出现分层现象,且仍为澄清透明乳液。     

Preparation and photophysical behaviors of fluorescent chitosan bearing fluorescein: Potential biomaterial as temperature/pH probes

A novel method for attaching fluorescein (via its epoxy derivative) to water‐soluble chitosan, and the temperature/pH‐sensitive qualities of fluorescence were investigated. 3‐Epoxypropoxy fluorescein (EPF) was firstly synthesized by the reaction between fluorescein and epichlorohydrin, and then water‐soluble chitosan bearing fluorescein (CS‐EPF) was prepared via ring‐opening reaction with EPF. They were characterized by the methods of ¹H NMR, MS, IR, UV–Vis, and luminescence spectra, respectively. The chemiluminescent and photophysical behaviors of EPF and CS‐EPF were studied in detail. The results showed that the fluorescent chitosan could still provide temperature and pH sensitivities similar to that of fluo‐ rescein, achieving better long‐term stability and fast equilibrium response. CS‐EPF had an excellent linear response between relative fluorescence intensity and temperature in the range of 0–60°C and two linear relationships between relative fluorescence intensity and pH in 0.0–4.14 and 8.15–13.20, respectively. This investigation may provide a convenient way to prepare low‐cost and multifunctional macromolecule biomaterial to probe pH and temperature in biological systems. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 3960–3966, 2007     

“人流血”中早孕因子的分离、纯化及鉴定

目的　分离、纯化并鉴定“人流血”中的早孕因子。方法　采用DEAE纤维素离子交换层析 ,S Sepharosefastflow离子交换层析 ,ConA SepharoseCl 4B亲和层析 ,Heparin SepharoseCl 6B亲和层析等方法进行纯化。用花结抑制实验检测出其活性。以SDS 聚丙烯酰胺凝胶电泳检测其肽图。以等电聚焦电泳法检测其等电点。结果　从人流血中分离出EPF活性样物质 ,其蛋白含量为 0 .375mg/ml,SDS PAGE见 1条均匀带 ,其相对分子质量为2 6 5 0 0 ,等电点为 6 .87。结论　本研究提取的早孕因子性质与国内外报道的从妊娠初期孕妇血清中提取的基本一致     

高抗冲聚苯乙烯预聚体中两相的流变特性

用超速离心法将高抗冲聚苯乙烯预聚体分离成橡胶相和聚苯乙烯相后,分别研究两相的流变特性,然后将预聚体的粘度与两相的粘度进行关联.并对两相粘度比进行了讨论.     

醇醚糖苷微乳液相行为研究

用拟二元及拟三元相图法研究了醇醚糖苷(AEG30、AEG08)/醇/环己烷/水四组分微乳液的相行为,与烷基糖苷(APG)相行为作了比较,并用内聚能比(R比)理论作了解释。结果表明,拟二元体系,随着正丁醇质量分数的增大,APG、AEG08微乳液类型发生WinsorⅠ→Ⅲ(Ⅳ)→Ⅱ的转变,AEG30发生WinsorⅠ→Ⅲ(Ⅳ)→Ⅱ→Ⅳ→Ⅰ的转变,表面活性剂EO链越长,发生WinsorⅠ→Ⅲ(Ⅳ)转变所需最小醇质量分数越大;随着正戊、己醇质量分数的增大,AEG30微乳液类型发生WinsorⅠ→Ⅲ(Ⅳ)→Ⅰ转变。拟三元体系,随着表面活性剂及正丁醇(S+A)质量分数的增大,AEG微乳液类型也发生WinsorⅠ→Ⅲ(Ⅳ)→Ⅱ的转变,对于APG只出现WinsorⅡ、Ⅳ;油水比对AEG30/正戊、己醇/环己烷/水微乳相行为有很大的影响。