DQ-1型PP催化剂在Spheripol工艺上的应用研究

对DQ－1型高效催化剂在单环管Spheripol工艺上应用进行了研究，确定了最佳工艺参数：预聚温度为12－18℃，聚合温度为70℃，反应压力为3．4MPa，最佳的Al/丙烯为0．13kg/t；针对出现的细粉问题、轴流泵功率波动问题提出了初步的解决方案，并对DQ－1型催化剂的性能进行了评价。使用DQ－1型催化剂，聚丙烯单位生产成本每吨将降低111．2元。     

聚丙烯DQ型球形催化剂的工业应用

将DQ型球形催化剂在间歇式液相本体法聚丙烯装置上的工业应用试验情况与其他高效催化剂进行对比。结果表明，DQ型球形催化剂操作性能好，生产效率高，对丙烯原料适应性强；其产品质量好，后加工性能优良。     

增塑剂

可降解聚合物用酯增塑剂的制备 日本专利公开JP2007 16，092（2007．1．25）本专利介绍了一种分子式为R^1O（x^1O）nlOCR^3CO2（X^2O）n2R^2（I；R^2=C1-20烷基；X^1，X^2=C2-4烷撑基，n1，n2=1-20；R^3=C2-1。烷撑基）的酯增塑剂。在酸催化剂存在下，0．1—40kPa压力下由二元酸或酸酐与多烷撑甘醇烷基醚反应制得上述酯化合物。     

铜盐催化剂对溴代苯酚聚合反应的影响

研究了不同铜盐对溴代苯酚聚合反应产率的影响，利用Taft取代基常数作为考察指标得出∑δ*＞5．5时，铜（Ⅱ）盐才有催化活性；分离出的铜（Ⅱ）盐中，当CuCl2·2H2O／CH3ONa摩尔比为0．5时，对聚合反应有最大的催化活性，并提出了铜（Ⅱ）盐催化由铜（Ⅱ）—酚氧配合物中间体生成聚合物的单电子转移历程。     

YS-842催化剂在Hypol工艺PP中试装置上的应用

将Ziegler-Natta高效载体催化剂YS—842在Hypol工艺聚丙烯(PP)中试装置上进行应用考核，考察了该催化剂的适应性及共聚合性能。试验表明，YS—842催化剂活性高(达1．2Mg／g)、寿命长、氢调敏感性好：用YS—842催化剂生产的聚合物流动性好，粒径分布窄，细粉少，平均粒径为640μm；等规指数大于98．5％，堆密度大于0．45g／mL；试生产的F401、J340，其机械性能与使用进口催化剂生产的产品相当。     

梳型聚苯乙烯环氧醚聚氨酯合成与热分析

以环己烷为溶剂，浓硫酸和丙酸酐为磺化剂，采用非均相磺化方法，在少量分散剂作用下，制备了不同磺化度的磺化聚苯乙烯（SsPSH）；再以SsPSH和环氧树脂经加成、取代合成了梳型聚苯乙烯环氧苯醚，最后加入固化剂制得聚苯乙烯环氧醚聚氨酯。反应的最佳原料配比为：n（SsPSH）：n（EP）：n（固化剂）：／7,（催化剂）=1．0：1．0：0．33：0．012，各过程产品经FT—IR、TG、DTG、DTA、DSC、DMA检测，结果表明目标产品韧性好、强度高、耐热性好。     

L型热熔胶的研制

研制的SG010－C和SG010－X型催化剂，对氢气敏感性好，用于乙烯均（共）聚制L型热熔胶，在聚合过程中，通过改变催化剂的结构和氢调，控制聚合物的熔体指数、分子量分布、颗粒度、熔点等。可进一步生产出热熔胶粉末，不必粉碎分级。     

原子转移自由基聚合最新研究进展

概述了原子转移自由基聚合（ATRP）在引发体系、反应温度、反应介质、实施方法等方面的进展；介绍了3种不同催化剂脱除技术；结合最新的研究成果，着重论述了ATRP在进行聚合物分子设计，制备窄分子量分布聚合物、无规、梯度和交替共聚物，嵌段共聚物，末端官能团聚合物，接枝和梳状聚合物，星型及高支化聚合物等方面的应用。     

一种室温自交联聚烯烃的制备方法

本发明涉及一种室温自交联聚烯烃的制备方法，属于聚合物加工技术领域。它采用高速混合机将聚烯烃、引发剂、交联剂、接枝助剂、自交联促进剂、催化剂和抗氧化剂等混合均匀，按质量计，各组分的比例为100：（0．1～0．2）：（1—2）：（0．5～1）：（0．05～5）：（0．05—0．15）：0．1；再用双螺杆挤出机挤出成型（或造料），或将新生态粒料再经挤出、注射、压制成型，在室温下实现自交联，得到自交联聚烯烃。     

助催化剂对负载型Ziegler-Natta催化剂催化丙烯高温聚合的影响

在低温下通过三乙基铝和水在不同的Al／H2O摩尔比下分别制备了EAO1（2：1），EAO2（3：2），EAO3（5：4）和EAO4（10：9）等一系列乙基铝氧烷，并将其作为助催化剂用于丙烯在不同温度下的聚合反应。通过对不同助催化剂的研究，发现助催化剂对负载型Ziegler—Natta催化剂催化丙烯聚合有显著的影响。在7O℃时，不同助催化剂所制备的聚合物的等规度相近，但聚合活性按AIEt3〉EAOl〉EAO2〉EAO3〉EAO4次序递减，而EAO制备的聚合物的分子量明显高于AIEt3；在100℃时，不同助催化剂（除EAO4外）的聚合活性相差不大，但聚合物的等规度和分子量都按AIEt3≈EAO1〈EAO2〈EAO3次序递增。结果表明助催化剂的反应性和体积大小影响活性中心的状态，进而影响聚合物的性质。     

High flux nanofibrous composite microfiltration membrane prepared by melt blending extrusion: Application in liquid filtration

High flux PP/EVOH nanofibrous composite microfiltration membrane (P/E‐NCMM) based on polypropylene (PP) (575 nm) and polyethylene‐co‐polyvinyl alcohol (EVOH) nanofibers (248 nm) with low operation pressure for liquid filtration was fabricated by melt blending extrusion. PP nanofibers as the scaffold played a supporting role, and EVOH nanofibers filled in the PP nanofibers network structure narrowed the pore size and improved the wettability. Taking advantages of PP and EVOH nanofibers, the nanofibrous composite membrane created fascinating features for liquid filtration. The experimental results showed that the P/E‐NCMM had high average pure water flux at low operating pressure. The P/E‐NCMM with 30 wt % PP nanofibers showed high water flux [450.9 L/(m² h)] even at very low feeding pressure (0.05 MPa) with above 95% retention for TiO₂ suspension. The results indicated that the P/E‐NCMM prepared by this method had great potential for the application in liquid filtration. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133, 43585.     

无纺布专用树脂的研制开发

根据无纺布原料的要求，分析了进口和自产聚丙烯（PP）树脂质量上的差异，确定改进目标为分子量分布变窄，断裂伸长率变高，选用N型高效催化剂，经过优化聚合工段的生产，稳定粉料的熔体流动指数（MI），在造粒过程中，选用过氧化物TX301作降解剂，调整造粒添加剂配方和挤压造粒操作温度，采用降解法生产工艺，将低MI的PP粉料降解为高MI的无纺布专用树脂（JNW28），JNW28的分子量分布窄（达2．11），断裂伸长率高（达1000％），经国内外用户试用，用其生产的高档无纺布产品质量合格，满足生产的要求。     

NIR,DSC, and FTIR as quantitative methods for compositional analysis of blends of polymers obtained from recycled mixed plastic waste

Methods for the determination of the composition of two binary blends in mixtures of recycled polymeric materials were analyzed and compared. Recycled polypropylene/polyethylene (PP/HDPE) and recycled poly(acryl‐butadiene‐styrene) and polypropylene(ABS/PP) were used to develop and validate the methods. Diffuse reflectance near infrared spectroscopy (NIRS) offers high sensitivity and ease of operation and a possibility to perform multivariate data analysis. In comparison, differential scanning calorimetry (DSC) and Mid‐IR, which are commonly used for this purpose require certain sample preparation and are indeed time consuming. In addition, the low sensitivity of these two methods to concentrations lower than 1% wt makes their application in quality control of recycled polymers inappropriate. NIR can be used for estimating the composition of the recyclate on‐line in only a few seconds, no sample preparation is required, and high precision is achieved. We obtained a root mean square error of prediction (RMSEP) equal to 0.21% wt in the interval from 0‐15% wt of PP in HDPE and a RMSEP equal to 0.91% wt in the interval 0‐100%. For blends of PP/ABS a RMSEP of 0.74% wt in the range 0‐100% and 0.32% wt in the range 0‐15% wt PP was calculated. Most of the variation in the spectral data with respect to the polymer blend composition for all the studied blends were explained by two principal components (PC). The optimal number of factors (PC) was determined by cross‐validation analysis.     

Thermal stress–strain of self‐compacting concrete in compression

Self‐compacting concrete or self‐consolidation concrete (SCC) is being used in underground and other industrial structures that may be subjected to high temperatures during operation or in case of an accidental fire. The proper understanding of the effects of elevated temperatures on the stress–strain relationship of SCC is necessary in the assessment of structural safety. This paper presents the high temperature behavior from an experimental study carried out on SCC subjected to high temperatures. The effects of temperature, strength grade, and polypropylene (PP) fibers on the initial elastic modulus, strain at peak stress, and stress–strain curves of SCC are studied, which offered a test basis for estimating the deformation of SCC under high temperature. An empirical constitutive formula for the thermal stress–strain of SCC is developed on the basis of the deformation characteristics of PP fiber‐modified SCC. Copyright © 2012 John Wiley & Sons, Ltd.     

降低间歇本体法PP装置丙烯单耗的工艺研究

分析了造成间歇本体法聚丙烯(PP)生产过程中丙烯单耗高的原因,提出了用变压吸附工艺回收不凝气,用连续氮气汽提置换闪蒸釜的工艺设想,初步研究和实践证明,采用连续汽提置换工艺可将闪蒸釜氮气置换过程排出的气体全部排入气柜回收处理,变压吸附工艺处理后的净化氮气中丙烯体积分数约1%,该技术预计可使间歇本体法PP装置每吨PP的丙烯...     

13C-NMR和近红外光谱研究PP序列结构

利用核磁共振碳谱和近红餐光谱法研究了聚丙烯（PP）微观序列结构，建立了精确测定PP立构规整度的近红外数学模型，该方法简便、快速、准确、重复性好，两者之间的相关性很好，尤其适用于工业生产的中间控制分析。     

Classification of volatile products evolved during temperature-programmed co-pyrolysis of low-density polyethylene (LDPE) with polypropylene (PP)

Temperature programmed co-pyrolysis of low-density polyethylene (LDPE) with polypropylene (PP) was investigated. The aim of this research was to determine the volatile product distribution and product evolution rate of co-processing of LDPE with PP. A series co-pyrolysis operation was performed with LDPE and PP using a 1:3, 1:1, 3:1 total carbon ratio of LDPE to PP. A fixed bed reactor was used to pyrolyse small sample of LDPE and PP mixture under an inert gas flow (argon). A special sampling technique was used for collecting organic products eluted from the reactor at different temperature and time intervals. The co-pyrolysis products were analyzed by capillary gas chromatography and the total product evolution rate was investigated as a function of temperature and time. n-paraffins and 1-olefins in aliphatic fraction of co-pyrolysis products were classified as a carbon number. In addition, the recovery of total organic carbon as an organic volatile product was determined. The assessments were based on incorporating the results on temperature-programmed pyrolysis of LDPE and PP. The effect of co-processing of LDPE with PP was determined by calculating the difference between the experimental and the hypothetical mean value of conversion of total organic carbon into volatile products. Conversion into volatile hydrocarbons was found to be higher, with the increasing PP ratio in the co-pyrolysis operation.     

Polypropylene‐dispersed domain as potential nucleating agent in PS and PMMA solid‐state foaming

The potential of using dispersive domains in a polymer blend as a bubble nucleating agent was investigated by exploiting its high dispersibility in a matrix polymer in the molten state and its immiscibility in the solid state. In this experiments, polypropylene (PP) was used as the nucleating agent in polystyrene (PS) and poly(methyl methacrylate) (PMMA) foams at the weight fraction of 10, 20, and 30 wt %. PP creates highly dispersed domains in PS and PMMA matrices during the extrusion processing. The high diffusivity of the physical foaming agent, i.e., CO₂ in PP, and the high interfacial tension of PP with PS and PMMA could be beneficial for providing preferential bubble nucleation sites. The experimental results of the pressure quench solid‐state foaming of PS/PP and PMMA/PP blends verified that the dispersed PP could successfully increase the cell density over 10⁶ cells/cm³ for PS/PP and 10⁷ cells/cm³ for PMMA/PP blend and reduce the cell size to 24 μm for PS/PP and 9 μm for PMMA/PP blends foams. The higher interfacial tension between PP and the matrix polymer created a unique cell morphology where dispersed PP particles were trapped inside cells in the foam. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

汽车用聚丙烯树脂的开发及国内应用现状

介绍了汽车用聚丙烯（PP）基础树脂的开发现状,简述了国内汽车用改性PP材料的应用概况,并展望了其未来的发展趋势。高模量、高抗冲、高流动PP是汽车用PP的主要品种,汽车用改性PP主要包括无机填料和弹性体增强增韧改性PP、玻璃纤维改性PP、低气味改性PP、耐刮擦PP等;汽车用改性PP的回收利用也变得越来越重要。     

发泡用高熔体强度聚丙烯的研究

以过氧化苯甲酰(BPO)为引发剂,在同向双螺杆挤出机上对聚丙烯(PP)进行硅烷交联,制备了高熔体强度聚丙烯(HMSPP),然后制得高发泡倍率的PP制品.实验对改性PP的熔体强度、力学性能、热性能和发泡性能进行了表征.结果表明:自制HMSPP的熔体强度是纯PP的5.01倍,力学性能和耐热性与纯PP相比均有较大提高,可用于成型高发泡倍率制品.