聚碳酸酯工艺与市场

简述了聚碳酸酯生产工艺,对国内外聚碳酸酯生产厂家做了简要介绍,并介绍了国内外聚碳酸酯的市场需求情况。     

聚碳酸酯的市场前景及技术进展

简述了国内外聚碳酸酯的生产和市场情况,并对聚碳酸酯的市场发展趋势进行了分析和预测。介绍了聚碳酸酯的生产工艺技术及发展趋势,并详细介绍了各大公司的非光气工艺特点,并对我国聚碳酸酯工业的发展提出了建议。     

聚碳酸酯热降解与稳定性的研究进展

综述了聚碳酸酯(PC)热稳定性影响因素;阐述了聚碳酸酯热降解产物和热降解机理;介绍了聚碳酸酯端基、摩尔质量及其分布、添加剂等对聚碳酸酯热稳定性的影响;并讨论了提高聚碳酸酯热稳定性的途径及方法.     

我国聚碳酸酯市场前景分析

阐述了聚碳酸酯的结构、性能特点和应用领域,介绍了我国聚碳酸酯的消费市场,同时指出了聚碳酸酯工业未来的开发前景。     

聚碳酸酯的生产及市场

介绍了聚碳酸酯生产工艺技术的进展，综述了国内外聚碳酸酯的生产及市场情况，对我国聚碳酸酯的市场发展趋势进行了分析和预测，并对我国聚碳酸酯工业的发展提出了几点建议。     

国内外聚碳酸酯的生产状况比较分析

介绍了聚碳酸酯生产工艺技术的进展,综述了国内外聚碳酸酯的生产情况.对我国聚碳酸酯的生产和消费发展趋势进行了分析和预测.并对我国聚碳酸酯工业的发展提出了几点建议.     

聚碳酸酯生产及市场分析

简述了国内外聚碳酸酯的生产和市场情况,并对聚碳酸酯的市场发展趋势进行了分析和预测。介绍了聚碳酸酯的生产工艺技术及发展趋势,并对我国聚碳酸酯工业的发展提出了建议。     

国内外聚碳酸酯的生产状况比较分析

介绍了聚碳酸酯生产工艺技术的进展,综述了国内外聚碳酸酯的生产情况.对我国聚碳酸酯的生产和消费发展趋势进行了分析和预测.并对我国聚碳酸酯工业的发展提出了几点建议.     

国内外聚碳酸酯的生产现状分析

介绍了聚碳酸酯的生产工艺技术进展，综述了国内外聚碳酸酯的生产能力及未来的发展趋势，最后提出了加快发展我国聚碳酸酯技术的几点意见。     

脂肪族聚碳酸酯生产技术和市场应用现状及发展前景

介绍了脂肪族聚碳酸酯在国内外的技术发展情况,分析了脂肪族聚碳酸酯的市场和应用现状,展望了脂肪族聚碳酸酯的未来发展前景.     

Boiling water aging of polycarbonate and polycarbonate/acrylonitrile–butadiene–styrene resin and polycarbonate/low‐density polyester blends

The effects of boiling water on the mechanical and thermal properties and morphologies of polycarbonate (PC), PC/acrylonitrile–butadiene–styrene resin (PC/ABS), and PC/low‐density polyester (PC/LDPE) blends (compositions of PC/ABS and PC/LDPE blends were 80/20) were studied. PC and the PC/ABS blend had a transition from ductile to brittle materials after boiling water aging. The PC/LDPE blend was more resistant to boiling water aging than PC and the PC/ABS blend. The thermal properties of glass‐transition temperature (T_g) and melting temperature (T_m) in PC and the blends were measured by DSC. The T_g of PC and PC in the PC/ABS and PC/LDPE blends decreased after aging. The T_g of the ABS component in the PC/ABS blend did not change after aging. The supersaturated water in PC clustered around impurities or air bubbles leading to the formation of microcracks, which was the primary reason for the ductile–brittle transition in PC, and the microcracks could not recover after PC was treated at 160°C for 6 h. The PC/ABS blend showed slightly higher resistance to boiling water than did PC. The highest resistance to boiling water of the PC/LDPE blend may be attributed to its special structural morphology. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 589–595, 2003     

Preparation and characterization of melt‐processed polycarbonate/multiwalled carbon nanotube composites

This study describes the preparation of polycarbonate (PC)/multiwalled carbon nanotube (MWCNT) composites by melt processing the PC and PC/MWCNT master batch at 260°C. The PC/MWCNT master batch was prepared using ultrasonic mixing the carboxylic acid containing MWCNT and PC in a tetrahydrofuran (THF) solution. The HRTEM images of PC/MWCNT master batch and PC/MWCNT nanocomposites show that the MWCNT is well separated and uniformly distributed in the PC matrices. Mechanical properties of the fabricated nanocomposites measured by dynamic mechanical analysis indicate significant improvements in the storage modulus when compared with that of pure PC matrix. The conductivities of 2 and 5 wt% PC/MWCNT nanocomposites are more than four and seven orders in magnitude higher than that of PC without MWCNT, respectively. POLYM. ENG. SCI., 2008. © 2008 Society of Plastics Engineers     

Effect of polycarbonate molecular weight on polymer blends of polycarbonate and ABS

The melt viscosity of polycarbonate/acrylonitrile-butadiene-styrene (PC/ABS) blends relative to PC is significantly lower, even lower than that of pure ABS in some compositions. Annealing above the T_g of PC coalesces and coarsens phase structure in core and skin regions. Increase in the molecular weight of PC in PC/ABS blends results in low-temperature fracture toughness improvement but suffers from the disadvantage of higher melt viscosity. The selection of PC in PC/ABS blends must be a compromise between the toughness advantages of higher PC molecular weight and the disadvantage of higher melt viscosity. © 1993 John Wiley & Sons, Inc.     

热氧老化对聚碳酸酯结构和性能的影响

分别在90～120℃环境下,对聚碳酸酯(PC)进行人工热氧加速老化实验.研究PC老化后的结构性能变化和热氧老化机理.结果表明:在低于120℃温度条件下,老化120 h后,PC仍显示强而韧的性能,但断裂伸长减小;在120℃温度条件下,老化24 h后,PC拉伸断裂伸长消失;PC的热氧降解过程主要是以热诱导氧化降解反应,降解反应引起端基、侧基从主链断裂脱落,导致内部缺陷,力学性能随之下降.     

聚烯烃弹性体增韧改性聚碳酸酯的研究

用四种聚烯烃弹性体对聚碳酸酯（PC）进行了增韧改性。探讨了不同种类和用量的增韧剂对聚合物共混物力学性能的影响。结果表明，EVA的加入使共混物韧性改善最明显，当其用量为15％时，材料的缺口冲击强度提高至38．7kJ／m^2，为纯PC的25倍，但材料的拉伸强度急剧下降。POE—g—MAH对PC的增韧效果仅次于EVA，但共混物的拉伸强度降低程度比EVA小，且共混物的断裂伸长率提高很多。其它两种共混体系PC／EAA、PC／LLDPE-g—MAH的性能介于EVA和POE—g—MAH之间。综合考虑材料的各种机械性能，添加20％的POE—g—MAH的PC共混物的性能较佳。     

聚碳酸酯合金的研究现状

概述了PC／ABS、PC／PE、PC／PS、PC／PET、PC／PA等合金的增容方法、增容后合金的结构与性能、不同PC合金性能的优缺点，讨论了PC合金化研究中存在的问题以及可能的解决方法。     

聚碳酸酯在轻型防弹玻璃上的应用研究

研究单层PC、层合PC、PC与有机玻璃层合（AC／PC）、PC与无机玻璃层合（G／PC）以及PC与有机玻璃和无机玻璃混合层合（G／AC／PC）结构的防弹性能，对各种结构的减重效果和应用前景进行了分析和比较。结果表明，所有含PC的层合结构都有减重效果，但层合PC或AC／PC之类的有机结构减重效果的防弹能力远不如G／AC／PC或G／PC结构，G／AC／PC和G／PC结构最适合于轻型防弹玻璃。     

The study of char forming on OPS/PC and DOPO‐POSS/PC composites

Polyhedral oligomeric octaphenyl silsesquioxane (OPS) and polyhedral oligomeric silsesquioxane containing 9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide (DOPO‐POSS) with polycarbonate (PC) were each prepared by twin screw extrusion. Their flammability was studied by cone calorimetry under different heat fluxes (35 and 50 kW/m²). In the cone calorimeter testing, thermocouples were used to measure the temperature at the top and bottom of the composites. Compared to the DOPO‐POSS/PC composite, the char layer of the OPS/PC composite is better for preventing heat transfer, the temperature change indicates that OPS/PC composite has a longer period of char formation, and the organization of their char materials are different. The DOPO‐POSS/PC composite has a harder char layer than the OPS/PC composite, but the OPS/PC composite char layer is more compact. The char layer macrostructure was studied with scanning electron microscopy (SEM) and EDS, which indicated that there are many bubbles and pores in the DOPO‐POSS/PC composite. EDS showed that there was some Si content in the exterior and interior char for the DOPO‐POSS/PC composite; there is a greater Si content in the exterior OPS/PC char residue than in the interior. The storage modulus of OPS/PC composite was higher than the PC control and DOPO‐POSS/PC composite at low frequencies. The values of η* of the OPS/PC composite were higher than the PC control and DOPO‐POSS/PC composite at low frequencies; also, the PC control exhibits a quasi‐Newtonian regime, but the OPS/PC and DOPO‐POSS/PC composites exhibit typical shear‐thinning behavior. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 39892.     

聚碳酸酯合金的研究现状及发展趋势

概述了PC／PO、PC／ABS、PC／LCP、PC／PET等合金的增容方法、增容机理、增容前后合金的结构与性能、不同PC合金性能的优缺点,讨论了PC合金化研究中存在的问题,指出了PC合金的发展趋势。     

Morphology and electrical resistivity of melt mixed blends of polyethylene and carbon nanotube filled polycarbonate

Blends were prepared from a high density polyethylene (PE) material and a conductive polycarbonate (PC) composite containing multiwalled carbon nanotubes (MWNT). The PC composite contained 2 wt% MWNT and was prepared by diluting a PC masterbatch consisting of 15 wt% MWNT by melt mixing in an extruder. The aim of blending a conductive PC composite with PE was to obtain a conductive blend at lower amounts of MWNT than required for the pure PC component. The blend morphology was found to be co-continuous over a broad composition range of 30–80 vol.% of the filled PC phase as verified by selective extraction of PC and morphological investigations. The co-continuous structure is very fine with ligaments in the range of 1 μm. Significantly reduced volume resistivity values, i.e. in the range of 10⁷ Ω cm, could be achieved in the same composition range of that of the continuous PC phase, i.e. starting at compositions of 30 vol.% filled PC. Here, the total MWNT content in the blend was only 0.41 vol.%. Interestingly, even if the MWNT had been incorporated in the PC phase, the tubes are still visible in the blends after selective extraction of PC. Scanning electron microscopy investigations revealed that the MWNT bridge the PC and PE phases, at least with their ends. This can be understood by the length dimensions of the tubes, which is higher than the phase sizes in the blends.