新型耐热级SMA/ABS工程塑料合金

介绍耐热级ＳＭＡ／ＡＢＳ工程塑料合金的制备和性能,研究了ＳＭＡ、ＡＢＳ配比、增韧剂对合金性能的影响。结果表明,ＳＭＡ的加入使冲击强度下降,但加入增韧剂可提高合金的冲击强度达到或超过ＡＢＳ水平,当ＳＭＡ∶增韧剂∶ＡＢＳ＝５０∶２５∶２５时,缺口冲击强度可达２００Ｊ／ｍ。已推出通用级Ｅ－２２０用于ＰＣ改性、耐热级Ｈ２５１用于耐热要求的家电、玻纤增强级２５１Ｇ用于汽车零部件     

PC/ABS合金及其阻燃性能

为了提高机械性能和阻燃性能,将ＭＢＳ作为第三组分加入到ＰＣ／ＡＢＳ合金及其阻燃合金中。对不同配比合金的性能进行测试。发现ＭＢＳ加入到ＰＣ／ＡＢＳ合金中,可以提高ＰＣ／ＡＢＳ的冲击性能;ＭＢＳ加入到ＰＣ／ＡＢＳ阻燃合金中,既可以提高合金的冲击性能,又可以提高合金的阻燃性能,所得合金的综合性能优异。     

SMPAH在PA6／ABS合金中的相容化作用研究

采用（苯乙烯／马来酸酐）共聚物（ＳＭＡＨ）作相容剂，通过熔融共混制备了ＰＡ６／ＡＢＳ合金。对三种牌号ＡＢＳ树脂进行了选择，通过不同ＳＭＡＨ含量的ＰＡ６／ＡＢＳ合金的力学性能、熔体流动速度、动态力学性能，以及微观结构剖析，分析了ＳＭＡＨ的相容化机理。     

马来酸酐,苯乙双单体接枝ABS及其应用

采用熔融法了马来酸酐（ＭＡＨ）和苯乙烯（Ｓｔ）接枝ＡＢＳ。结果表明，只用ＭＡＨ单体时，ＭＡＨ接枝率随ＭＡＨ添加量增中而提高，接枝效率一般不超过６０％；用Ｓｔ和ＭＡＨ两种单体时，在ＭＡＨ添加量保持不变时，ＭＡＨ接枝率随Ｓｔ添国量的增加而提高，但达到一定量后开始下降。用ＭＡＨ和Ｓｔ双单体接枝改性的ＡＢＳ树脂增容的ＡＢＳ／ＰＣ合金与未增容的相比，制品缺口冲击强度提高１．５倍。     

HDP—PVC／ABS合金材料的研究

研究了高聚合度聚氯乙烯（ＨＤＰ－ＰＶＣ）／ＡＢＳ二元体系力学性能以及添加第三组分对合金材料力学性能的影响。结果表明：ＨＤＰ－ＰＶＣ／ＡＢＳ配比为１００／２５时,共混物的综合性能好,体系能形成较完善的海岛结构;ＨＤＰ－ＰＶＣ／ＡＢＳ／ＭＢＳ体系中,ＭＢＳ能改善多元体系的界面性能,提高合金材料的综合性能;ＨＤＰ－ＰＶＣ／ＡＢＳ／ＣＰＥ体系中,ＣＰＥ能使形成网状结构和海岛结构共存的合金体系,提高合金材料     

马来酸酐接枝ABS及其应用

采用熔融法研究了马来酸酐（ＭＡＨ）接枝ＡＢＳ。结果表明：马来酸酐接枝率随ＭＡＨ添加量或引发剂过氧化二异丙苯（ＤＣＰ）的添加量垢增加而提高，但是添加量过多时，接枝率增加速率变慢；ＡＢＳ接枝马来酸酐后，冲击性能明显下降，但拉伸性能变化不大；马来酸酐接枝改性ＡＢＳ，增容ＡＢＳ／ＰＣ合金共湿物，可提高合金的缺口抗冲击强度大１．５～２．５倍。     

配方对吉化ABS性能的影响

以吉化产ＡＢＳ粉料和ＳＡＮ树脂为基础原料，通过调整各组分及其用量，考察内润滑剂、外润滑剂、粉料的含量及不同分子量ＳＡＮ对吉化ＡＢＳ性能的影响。结果表明：当ＡＢＳ粉料粉料／ＳＡＮ质量比为３６／６４、内润滑剂ＥＢＡ含量为１％，外润滑剂硬脂酸镁含量为０．０９％时，ＡＢＳ有较好的综合性能和加工性。     

国内ABS合金研究的最新进展

叙述了我国近几年对ＡＢＳ合金的研究状况,特别是ＡＢＳ／ＰＶＣ、ＡＢＳ／ＴＰＵ、ＡＢＳ／ＰＣ、ＡＢＳ／ＰＡ等重要的ＡＢＳ合金种类的研究进展,对其性能及应用进行了介绍。     

PC/PET/PE-g-MAM三元共混体系流动性的研究

以ＰＥｇＭＡＨ 和ＰＥｇＭＡＮａ 、ＰＥｇＭＡＺｎ 马来酸盐离聚物为相容剂组成ＰＣ／ＰＥＴ／ＰＥｇＭＡＭ 三元共混体系。用毛细管流变仪研究了不同ＰＥｇＭＡＭ 的接枝率及用量对共混物流动性的影响,结果表明：马来酸盐离聚物增强了ＰＣ 和ＰＥＴ 间的相容性,当其含量或接枝率较大时,可以显著降低ＰＣ／ＰＥＴ 共混物的表观粘度,提高体系的流动性,相同接枝率的ＰＥｇＭＡＮａ 对共混体系表观粘度的影响更为显著。     

PVC/ABS/弹性体三元共混合金组成与力学性能研究

本文研究了ＰＶＣ／ＡＮＳ／弹性体三元共混合金的组成与性能的关系。研究表明，弹性体与ＰＶＣ／ＡＢＳ合金共混，能显著改变ＰＶＣ／ＡＢＳ合金的各项性能。     

ABS树脂中胶含量对PC/ABS合金性能及微观结构的影响

采用胶含量(质量分数,下同)为60％的丙烯腈-丁二烯-苯乙烯接枝共聚物(ABS)接枝粉料与苯乙烯-丙烯腈共聚物(SAN)以不同比例进行共混,制备了胶含量范围为10％～55％的ABS树脂.将胶含量不同的ABS树脂与聚碳酸酯(PC)以30/70、50/50、70/30的质量比利用熔融共混技术,制备了组成不同的PC/ABS共混物,考察了ABS树脂胶含量对不同组成的PC/ABS合金性能的影响.研究结果表明:随着ABS树脂中胶含量的增加,ABS树脂的冲击强度不断提高,屈服强度、模量及熔体流动速率逐渐降低.随着PC/ABS合金中ABS胶含量的增加,合金的冲击强度显著提高,ABS树脂中胶含量大于30％以后,合金的冲击强度变化不大,且3种组成的PC/ABS合金的冲击强度相差不大.合金的屈服强度、模量及熔体流动速率却随着ABS中胶含量的增加不断降低,其中组成为30/70的PC/ABS合金最低.利用扫描电镜观察了PC/ABS组成为70/30合金的微观结构,研究表明,ABS树脂形成连续相,PC为分散相,随ABS树脂胶含量的增加,合金的相形态变得更精细.     

Migration of MWCNTs during melt preparation of ABS/PC/MWCNT conductive composites via PC/MWCNT masterbatch approach

The migration of multi-walled carbon nanotubes (MWCNTs) from the thermodynamically favored polycarbonate (PC) phase to the acrylonitrile-butadiene-styrene (ABS) phase is observed when PC/MWCNT masterbatch is diluted with PC and ABS by melt mixing for 5 min with 70% of ABS having relatively high rubber content. The migration is explained by a combination of the morphology evolution, high rubber content and higher affinity of MWCNTs to polybutadiene (PB) than to PC. The high rubber content increases the probability of the contact between MWCNTs and elongated rubber particles during the morphology evolution, most MWCNTs are dragged out of the PC phase to the ABS phase by the surrounding rubber particles because of the better affinity of MWCNTs to PB than to PC. As a result of the selective localization of most MWCNTs in the continuous ABS phase, the resulting ABS/PC/MWCNT composites are conductive. However, with a long mixing time of 60 min, most MWCNTs come back to the PC phase due to the change in the structure of PB chains which decreases the interaction between MWCNTs and rubber particles, resulting in non-conductive materials.     

无卤阻燃PC/ABS合金性能及应用

通过非等温热失重方法对无卤阻燃剂双酚A双磷酸二苯酯(BDP)和Sb2O3及其复配体系,以及采用该类阻燃剂的聚碳酸酯(PC)/(丙烯腈/丁二烯/笨乙烯)共聚物(ABS)合金的热分解行为进行了研究;同时,对采用该类阻燃剂的PC/ABS合金的力学性能、阻燃性能进行了研究,并通过扫描电镜对加入BDP的PC/ABS合金的微观结构进行了研究.结果表明,BDP/Sb2O3为7/3、质量分数为10%时,合金的综合性能优良,氧指数达到29.5%,缺口冲击强度达到84.23 kJ/m2>;BDP对PC/ABS合金具有一定的增容效果.合金可用于汽车行业、电子电器等行业.     

Influence of rubber content in ABS in wide range on the mechanical properties and morphology of PC/ABS blends with different composition

A series of acrylonitrile–butadiene–styrene (ABS) with different rubber content were prepared by diluting ABS grafting copolymer containing 60% rubber with a styrene–acrylonitrile copolymer. ABS prepared were blended with bisphenol‐A‐polycarbonate (PC) at the ratio of 70/30, 50/50, and 30/70 to prepare PC/ABS blends. Influence of rubber content in ABS on the properties of ABS and PC/ABS blends were investigated. PC/ABS blends with different compositions got good toughness when the rubber in ABS increased to the level that ABS itself got good toughness. The tensile properties and processability of PC/ABS blends decreased with the increase of the total rubber content introduced into the blends. ABS with the rubber content of 30 wt% is most suitable to be used to prepare PC/ABS blends. The rubber content in ABS affected the viscosity of ABS, and subsequently the viscosity ratio of PC to ABS. As a result, the morphology of PC/ABS blends varied. The increase of rubber content in ABS results in finer structure of PC/ABS blends. POLYM. ENG. SCI. 46:1476–1484, 2006. © 2006 Society of Plastics Engineers.     

六苯氧基环三磷腈阻燃PC/ABS合金及其高性能化研究

采用熔融挤出法制备了阻燃聚碳酸酯/丙烯腈丁二烯苯乙烯共聚物（PC/ABS）合金材料。利用热失重分析仪、氧指数测试仪、垂直燃烧仪、锥形量热仪、电子万能试验机和冲击试验机研究了相容剂马来酸酐接枝聚乙烯共聚物（PE-g-MAH）以及阻燃剂六苯氧基环三磷腈（HPCTP）的加入对PC/ABS合金材料的热稳定性、阻燃性能和力学性能的影响,并采用扫描电子显微镜对材料的残炭形貌进行分析。结果表明,当PC/ABS的质量比为7/3,以PE-g-MAH为相容剂,且HPCTP添加量为15 %时,阻燃PC/ABS合金材料的综合性能最好,其极限氧指数为26.4 %,热释放速率峰值及热释放总量达到最小值,且能够达到UL 94 V-0级,拉伸强度和缺口冲击强度分别为55 MPa和32.9 kJ/m2。     

Polyblends based on vinyl chloride/propylene copolymer

Blends of vinyl chloride/propylene copolymer (VCM–P) with aromatic polycarbonate (PC) and with ABS terpolymer were studied. Particular emphasis was on characteristics of deflection temperature under load (DTUL), simply referred to as heat deflection temperature (HDT). In a binary system which contained PC and VCM–P, the HDT–composition plot exhibited an S-shaped curve, suggesting incompatibility. In contrast, a straight-line correlation, indicating compatibility, was found for VCM–P/ABS blends. These observations are consistent with dynamic measurements by viscoelastometer (Vibron Model DDV-II). Compatibility of the VCM–P/PC system was improved through incorporation of ABS copolymer, as indicated by the broadening of tan δ peak. Electron photomicrographs revealed that, in a 50% VCM–P binary blend, polycarbonate existed in a string-like morphology which differed from the compatible ABS system where the ABS copolymer was dispersed in a form of discrete particles.     

Influence of ABS type on morphology and mechanical properties of PC/ABS blends

The morphology and the mechanical properties of polycarbonate (PC) blends with different acrylonitrile–butadiene–styrene (ABS) materials were investigated. PC/ABS blends based on a mass-made ABS with 16% rubber and large (0.5–1μm) rubber particles are compared to blends based on an emulsion-made ABS with 50% rubber and small, monodisperse (0.12 μm) rubber particles over the full range of blend compositions. The blends with the bulk ABS showed excellent impact strength for most compositions, and those containing 50 and 70% PC exhibited ductile to brittle transition temperatures below that of PC. The blends with the emulsion ABS showed excellent toughness in sharp notch Izod impact tests at room temperature and in standard notch Izod impact tests at low temperatures near the T_g of the rubber. By melt blending the various ABS materials with a styrene–acrylonitrile (SAN 25) copolymer, materials with lower rubber concentrations were obtained. These materials were used in blends with PC to make comparisons at constant rubber concentration of 5, 10, and 15%. The results of this investigation show that brittle ABS materials can produce tough PC–ABS blends. It is apparent that small rubber particles toughen PC–ABS blends at lower rubber concentrations and at lower temperatures than is possible with large rubber particles. However, additional work is needed to understand the nature of toughening in these PC–ABS blends with different rubber phase morphologies. It is of particular interest to understand the exceptional ductility of some of the blends at low temperatures. © 1994 John Wiley & Sons, Inc.     

ABS树脂中胶含量对PC/ABS合金微观结构的影响

本实验采用胶含量为60%的ABS接枝粉料与SAN树脂以不同比例进行共混,制备了胶含量范围为10%～55%的ABS树脂。将胶含量不同的ABS树脂与PC以30/70、50/50、70/30的比例利用熔融共混技术,制备了组成不同的PC/ABS共混物。利用SEM电镜观察了PC/ABS合金的微观结构。研究表明,ABS树脂含量为30%时,在合金中形成分散相;ABS树脂含量为70%时,形成连续相;ABS树脂含量为50%时与PC形成双连续相结构。在三种结构中,ABS树脂胶含量的增加都使合金的相形态变得更精细。     

Effect of Rubber Content of ABS on Properties of PC/ABS Blends. I. Rheological,Mechanical, and Thermal Properties

ABSTRACT

The effect of rubber content of poly (acrylonitrile butadiene styrene) (ABS) on compatibility and properties of polycarbonate (PC)/ABS blend systems has been investigated. The rheological, mechanical, physical, and thermal properties of PC/ABS blend systems containing ABS of different rubber content were studied. The reduced torque data on Torque Rheocord indicated improved processability of PC by addition of ABS, however, in ABS-rich compositions, higher rubber content reduces the extent of improvement. The tensile strength of PC decreased with addition of ABS to it but PC-rich compositions have a nearly additive response. The deviation form additivity for blends having higher rubber ABS was more pronounced. However, the impact strength of blends having higher rubber ABS were higher than other types and showed a positive deviation from additivity with variation in compositions. The blends containing ABS with lower rubber content showed a single glass-transition temperature (Tg) in differential scanning calorimetry studies (DSC) in the whole composition range indicating miscibility. Although two Tgs, one associated with PC phase and one with ABS phase, were observed for blends containing high rubber ABS, the shift in Tgs with respect to pure component values indicates partial miscibility. The decrease in the extent of shift with increase of ABS in these blends indicates undesirable phase separation due to poor adhesion of higher level of rubber content.     

ABS／PMMA合金性能的研究

制备了不同配比的ABS/PMMA合金,分别研究了PMMA含量、粘度对合金的缺口冲击强度、拉伸强度、热变形温度、熔体流动速率等性能的影响。结果表明：ABS中引入PMMA可以提高耐热性能;ABS与PMMA共混能提高PMMA的力学性能特别是缺口冲击强度,当ABS/PMMA中PMMA为20%时,共混物具有最优的力学性能;一般情况下,ABS/PMMA合金的流动性介于ABS和PMMA的流动性之间,采用高粘度PMMA的合金性能较佳。