ABS/PC回收再造过程中形成孔洞规律的研究

以初级形态的ABS/PC树脂为原料模拟进行了熔融，加压，挤出造粒等回收再造的过程，并对再造粒进行了ES-EM表征和熔体质量流动速率的测定。研究了ABS/PC共混树脂回收再造后，粒子断面产生孔洞的规律。结果表明；ABS/PC回收再造后粒子断面出现的孔洞系ABS/PC中PC在高温条件下水解所致，且回收再造的次数越多，树脂的含水量越大，则孔洞数量越多，尺寸越大。这对出入境检验检疫部门和海关的执法检验及企业的日常检修人有实际应用价值。     

PA6/ABS/PC合金的研制

以PA6，ABS，PC为基础树脂，ABS-g-MAH为增容剂，二叔丁基过氧化物为引发剂，并加入改性剂等助剂，制备了PA6／ABS／PC合金，研究了增容剂的种类及含量，引发剂的种类，PA6的粘度，ABS的牌号及改性剂的含量对PA6／ABS／PC合金性能的影响。结果表明，采用1．0％－1．2％的ABS-g-MAH,30%的相对粘度2．8－3．0的PA6，40％的1300型PC，28％的ABS及0．5％的改性剂制得的PA6／ABS／PC合金优于日本孟山都公司的PA6／ABS合金。     

尼龙1212/EPDM-g-MAH共混体系的制备及性能研究

制备了尼龙（PA）1212／EPDM－g-MAH共混物，并对其力学性能、热性能及共混形态进行了研究，结果表明，增韧剂的加入使共混物的缺口冲击强度显著增大，当增韧剂含量为20％时，缺口冲击强度为74．98kJ/m^3，是纯PA1212的13．5倍；用二甲苯处理过的共混物试样断面很不平坦，有很多孔洞和类纤维体，说明弹性体粒子以球状分散于基体树脂中。     

PC／ABS合金研究进展

介绍了PC／ABS合金在国内外的发展状况及其应用，详述了制备PC／ABS合金所采用的增容技术及影响其性能的因素。     

PC/ABS合金的力学性能研究

应用双螺杆挤出机，将聚碳酸酯(PC)分别与2种具有不同粘度的ABS(丙烯腈／丁二烯／苯乙烯共聚物)树脂(ABS 747和ABS 757)进行熔融共混，制备出二元合金体系。在室温下测量了2种合金的拉伸性能和Izod冲击性能。结果表明，2种合金的拉伸性能对PC含量的依赖性截然不同，而冲击性能则较为相似。在相同条件下，PC／ABS 757的拉伸性能和冲击性能均优于PC／ABS 747，且前者在拉伸性能方面显示出一定的协同效应。     

光盘级聚碳酸酯的增韧研究

研究了马来酸酐接枝聚乙烯（PE－g-MAH)，核－壳共聚物（甲基丙烯酸甲酯／丁二烯／苯乙烯）共聚物（MBS）和（甲基丙烯酸甲酯／甲基丙烯酸丁酯）共聚物（ACR）对光盘级聚碳酸酯（PC）的增韧作用。结果表明，MBS，ACR能很好地分散在PC中，对PC的增韧效果显著。对PC合金损伤机理的研究表明，核－壳共聚物增韧PC的增韧机理为共聚的粒子的空洞化引发基体的剪切屈服。     

新型增容剂在PC/ABS合金中的应用

介绍了三种不同类型的新型增容剂并与传统的增容剂（PE-g-MAH)对比了在PC／ABS合金体系中的改性效果，试验表明，这三种增容剂对PC／ABS合金的增韧比PE－g-MAH效果都要好，其中，增容剂E3比E1，E2具有更好的增韧效果，同时还有增强作用，而且E3在PC／线性饱和聚酯合金体系中也有非常好的增韧效果，这种新型增容剂用量少，成本可接受，为PC合金的性能提高提供了一个较好的选择。     

PC／ABS合金研究进展

介绍了PC／ABS合金在国内外的发展状况及其应用，详述了制备PC／ABS合金所采用的增容技术及影响其性能的因素。     

ABS阻燃性能测试中差热/热重-红外光谱技术的应用

分别采用氧指数和差热、热重－红外光谱技术对常用的ABS材料进行测试。结果表明，试验样品差热数据和氧指数数据有对应关系。差热／热重－红外光谱联用可以观测到ABS热分解过程和分解产物，纯ABS和阻燃ABS的分解过程明显不同。通过差热／热重－红外光谱数据可以获取更多的材料在高温下的变化信息，从而有利于对材料阻燃性能和阻燃危寄性进行预测和判断。     

聚碳酸酯和乙烯-1-辛烯共聚物合金的结构与性能研究

研究了聚碳酯酯（PC）与乙烯－1－辛烯共聚物（POD）的便金（PC／POE）的结构与性能。结果表明，合金的冲击强度，拉伸强度和断裂伸长率均随POE用量的增加而降低，POE可有效地提高合金的低温（－30℃以下）冲击强度；扫描电镜观察表明PC与POE是不相容体系，两相存在明显的界面。PC／POE比例极大地影响合金的微观结构。POE质量分数为5％时，分散相为规则的球形；POE质量分数为20％时，分散相形状不规则。在23℃时，PC及PC／POE（90／10）冲击断面均表现为韧性断裂的特征，表面上分布有大量的剪切带；在－30℃时，PC表现为脆性断裂，而在PC／POE（90／10）的断裂表面上仍有耗能的较大形变。     

PC／Epoxy／LCP共混体的相容性与力学性能

研究了ＰＣ／Ｅｐｏｘｙ／ＬＣＰ三元混体的相容性与力学性能，将少量的小分子环氧树脂加入到ＰＣ／ＬＣＰ二元共混体中来改善共混体的相容性，进而改进ＬＣＰ的成纤维力，从而提高共混体的力学性能。     

In‐line analysis of the influence of monomeric and oligomeric hindered amine on the hydrolysis of polycarbonate in a PC/ABS blend

The polycarbonate/polyacrylonitrile butadiene styrene (PC/ABS) blends lose mechanical properties when exposed to outdoor conditions. This is due to the ultraviolet (UV) induced photo‐oxidation of the PC phase and the polybutadiene portion of the ABS. It is known that ABS can be stabilised against terrestrial light by the use of hindered amine in combination with a UV absorber. However, such hindered amine cannot be used when PC is present in a multi component polymer blend. The hydrolysis of PC is accelerated when a small amount of hindered amine light stabilisers (HALS) is incorporated in the resin and is exposed to elevated temperature. In this article the effect of monomeric and oligomeric hindered amine on the hydrolysis of PC during the compounding of PC/ABS blend in a twin screw extruder at 240°C is observed by means of in‐line UV‐vis spectroscopy. Tinuvin 765 was used as monomeric hindered amine and Tinuvin 622 as oligomeric hindered amine. The molecular weight of the compounded sample was determined by gel permeation chromatography (GPC) and the rheological properties were observed using an online viscometer. It was found that the extent of hydrolysis induced by the oligomeric hindered amine is less compared to monomeric amine. It was also observed that polymeric hindered amine imparts better dispersion of the ABS phase into the polymer blend. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010     

增韧PC/聚酯合金研究

对增韧聚碳酸酯(PC)/聚酯[聚对苯二甲酸乙二醇酯(PET)和聚对苯二甲酸丁二醇酯(PBT)]合金进行了研究,结合合金的相形貌结果,分别选择PC和聚酯是连续相的合金进行了研究,同时对比了相同树脂比例下PC/PET和PC/PBT之间性能的差别。增韧剂选择甲基丙烯酸甲酯-丁二烯-苯乙烯共聚物(MBS)或MBS和接枝环氧基团的丙烯酸酯类增韧剂(X-GM A)复配物。结果表明,使用相同的增韧剂,PC是连续相的情况下,冲击强度更高,相同树脂比例情况下,PC/PET合金冲击强度比PC/PBT的差,拉伸和弯曲强度相差不大,PC/PET合金的熔体稳定性能比PC/PBT的差,PC是连续相合金的熔体稳定性比聚酯是连续相的要好,含有X-GMA的合金熔体稳定性能更好,这些结果和酯基的热分解、PET分子链运动活性比PBT的差以及酯交换程度的差异等有直接的关联。     

PC／SMA共混体系的流变性能

PC/SMA共混体系的流变学实验表明,共混体系的流动行为指数n值小于1,PC树脂的加工性得到改善。SMA树脂与PC在熔融共混时有接枝共聚反应发生,SEM观察表明SMA树脂的加入量及其中MA含量的提高都可以使得合金中粒子尺寸减小,分布均匀。     

阻燃PC/ABS共混体系动态流变性能的研究

通过熔融共混法制备了阻燃PC/ABS复合材料,研究了其流变特性,探讨相容剂、剪切频率等因素对复合材料的动态储能模量、剪切损耗模量、损耗因子和复合黏度等动态流变参数的影响。结果表明:使用由丙烯酸树脂和苯乙烯-马来酸酐无规共聚物组成的复合相容剂,在加工条件下即角频率(ω)为12.6rad/s时,体系的复合黏度(η*)远小于PC的η*。     

新型增韧剂对PBT/PC合金增韧的研究

以双烯烃、苯乙烯、甲基丙烯酸甲酯为单体,采用种子聚合技术,合成了具有核-壳结构的接枝共聚物(MIS树脂),并与PBT/PC合金共混.结果表明,MIS树脂为15～18份时,PBT/PC合金的冲击强度最大.加入MIS树脂后,PBT/PC合金的断层明星,而且出现了很多小空洞,提高了PBT/PC合金的力学性能.MIS树脂可以用...     

酚醛树脂/氯磺化聚乙烯共混物的研究

用一般方法制备了固性配醛树脂（ＰＦ）／氯磺化聚乙烯（ＣＳＭ）共混物。测定了共混物制涂膜的物理机械性能、浇铸体的冲击性和耐蚀性。通过扫描电镜分析昆物浇铸体断面的形态。实验结果表明,共混物形成了ＩＰＮ结构。共混物的耐氧化性优于热固酚醛树脂,并改善了酚醛树脂的吸水性一和脆性。     

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     

A new supertough epoxy formulation with high crosslinking density

A highly crosslinked thermosetting epoxy resin was modified by a reactive blending process carried out in the presence of bisphenol-A polycarbonate (PC). FTIR spectroscopy investigations demonstrated that the presence of PC in the blend decreases the reactants conversion after the curing and postcuring processes. Moreover, it was found that the fracture toughness of this blend system increases markedly by increasing the PC content in the blend. No evidence of phase separation of the minor component during the crosslinking reaction steps was observed.