ABS树脂的共混改性

简要介绍了通过共混改性ABS树脂的方法以及改性ABS树脂的性能与应用。ABS树脂可与PVC、热塑性聚酯、PC及亲水性聚合物进行共混 ,讨论了影响ABS树脂与PVC、PC共混的因素     

BMI/DBA/PC改性树脂体系的制备与性能研究

采用熔融预聚法制备N, N'-4, 4' -二苯甲烷双马来酰亚胺（BMI）/二烯丙基双酚A(DBA)/聚碳酸酯（PC） (BMI/DBA/PC) 改性树脂体系,研究了含有不同含量PC的改性树脂的力学性能、热稳定性及界面结构。结果表明,PC的加入能明显提高树脂的韧性和强度;当PC含量为8 %（质量分数,下同）时,相比BMI/DBA树脂浇铸体,BMI/DBA/PC树脂浇铸体的拉伸强度提高36.3 %,冲击强度提高109.1 %;改性树脂体系保持了优异的热稳定性和较高的热变形温度;改性树脂体系的相界面结构为PC相以微球状分散于BMI/DBA中,相界面较厚,界面作用较好。     

双丁香酚封端聚硅氧烷与PC熔融共混及性能研究

以聚碳酸酯(PC)为基体树脂,加入双丁香酚封端聚硅氧烷(EMDnME),在双螺杆挤出机进行熔融共混,制备改性PC。采用核磁共振氢谱、扫描电子显微镜、熔融指数仪、热重分析仪、差示扫描量热仪对上述改性PC进行分析。结果表明,上述两种物质发生了脱水反应,EMDnME和PC以醚键连接;生成的改性PC在其他力学性能几乎没有变化的情况下,低温抗冲击性能、熔体质量流动速率、热分解温度均大幅提升,PC的加工性能和热稳定性得以有效提高。     

无卤阻燃PC树脂制备及性能

以ACS为改性树脂,固体磷酸酯为阻燃剂制备无卤阻燃PC树脂,研究了PC/ACS配比、阻燃剂及相容剂用量等因素对树脂综合性能的影响。试验结果表明,当PC/ACS配比为50∶50时综合性能最优;相容剂ACS-g-MAH可以改善产品的力学性能;磷酸酯与ACS树脂存在协同增效作用,相对无卤阻燃PC/ABS,阻燃剂用量大幅下降。     

ASA树脂的合成及PC/ASA合金的研究现状

概述了丙烯腈-苯乙烯-丙烯酸丁酯的三元共聚物(ASA)树脂的合成方法以及改性研究,阐述了聚碳酸酯(PC)/ASA合金的改性研究,包括导电和阻燃PC/ASA合金的研究现状,探讨了不同添加剂对合金性能的影响。最后概括了ASA树脂及其合金在不同领域的应用进展并展望了其发展前景。     

活性聚氨酯单体改性环氧-有机硅树脂性能的研究

研究了活性聚氨酯单体TDI改性环氧－有机硅树脂（ES）的化学反应,并对改性产物的结构和性能进行了研究,结果表明：改性后的树脂其成膜性以及成膜后的附着力,耐腐蚀性等性能得到明显改善。     

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N—苯基马来酰亚胺的合成研究进展及应用

介绍了N-苯基马亚酰亚胺的几种制备方法,并论述了其作为新一代改进树脂耐热性的共聚单体在ABS树脂、PVC树脂改性以及其他方面的应用。     

BMI树脂增韧改性的方法及新进展

综述了双马来酰亚胺树脂(BMI)增韧改性的主要方法及最新研究进展,主要包括胺类化合物改性、烯丙基化合物改性、橡胶改性、石墨烯改性、热塑性树脂改性、热固性树脂改性等方法。并对BMI树脂未来的发展趋势进行了分析。     

双马来酰亚胺树脂的研究进展

综述了近年有关双马来酰亚胺(BMI)树脂的改性现状和研究进展,主要包括胺类化合物改性、烯丙基类化合物改性、热塑性树脂改性、热固性树脂改性、无机功能材料改性、微胶囊改性、纳米金属氧化物改性、含磷氧化物改性、生物改性等,并对BMI树脂今后的发展趋势进行了分析和展望。     

Blends of bisphenol A polycarbonate and rubber‐toughened styrene–maleic anhydride copolymers

The morphology and mechanical properties of polycarbonate (PC) blends with rubber‐toughened styrene–maleic anhydride copolymer materials (TSMA) were investigated and compared with the properties of blends of PC with acrylonitrile–butadiene–styrene (ABS) materials. The PC/TSMA blends showed similar composition dependence of properties as the comparable PC/ABS blends. Polycarbonate blends with TSMA exhibited higher notched Izod impact toughness than pure PC under sharp‐notched conditions but the improvements are somewhat less than observed for similar blends with ABS. Since PC is known for its impact toughness except under sharp‐notched conditions, this represents a significant advantage of the rubber‐modified blends. PC blends with styrene–maleic anhydride copolymer (SMA) were compared to those with a styrene–acrylonitrile copolymer (SAN). The trends in blend morphology and mechanical properties were found to be qualitatively similar for the two types of copolymers. PC/SMA blends are nearly transparent or slightly pearlescent. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 74: 1508–1515, 1999     

弹性体改性聚碳酸酯研究

在聚碳酸酯（ＰＣ）中，加入不同份数的弹性体型甲基丙烯酸甲酯类共聚物Ｒ，进行了熔融共混挤出，并测试了共混物的各种力学性能，用扫描电镜和动态力学测量研究了材料的形态和结构。结果表明，Ｒ和ＰＣ有部分相容性。它是ＰＣ非常有效的增韧剂，同时，可以改善ＰＣ的加工流动性，二者共混可望开发出有重要实际意义的塑料合金。     

Effects of reactive compatibilizer on the core-shell structured modifiers toughening of poly(trimethylene terephthalate)

Poly(trimethylene terephthalate)/polybutadiene grafted polymetyl methacrylate (PB-g-PMMA, MB) blends were prepared by melt processing with varying weight ratios (0-5 wt%) of diglycidyl ether of bisphenol-A (DGEBA) epoxy resin as a reactive compatibilizer. DMA result showed PTT was partially miscible with MB particles in the presence of the compatibilizer. Fourier transform infrared (FTIR) and rheological measurements further identified the reactions between PTT and DGEBA epoxy resin. Scanning electron microscopy (SEM) displayed that the core-shell structured modifiers exhibit a smaller dispersed domain size with the addition of DGEBA epoxy resin. Mechanical tests showed the impact and tensile properties of PTT blends are improved by the introduction of DGEBA epoxy resin to the blends. SEM and TEM results showed shear yielding of PTT matrix and cavitation of rubber particles were the major toughening mechanisms.     

Effect of compatibilizer in acrylonitrile‐butadiene‐styrene toughened nylon 6 blends: Ductile–brittle transition temperature

The ductile–brittle transition temperatures were determined for compatibilized nylon 6/acrylonitrile‐butadiene‐styrene (PA6/ABS) copolymer blends. The compatibilizers used for those blends were methyl methacrylate‐co‐maleic anhydride (MMA‐MAH) and MMA‐co‐glycidyl methacrylate (MMA‐GMA). The ductile–brittle transition temperatures were found to be lower for blends compatibilized through maleate modified acrylic polymers. At room temperature, the PA6/ABS binary blend was essentially brittle whereas the ternary blends with MMA‐MAH compatibilizer were supertough and showed a ductile–brittle transition temperature at ?10°C. The blends compatibilized with maleated copolymer exhibited impact strengths of up to 800 J/m. However, the blends compatibilized with MMA‐GMA showed poor toughness at room temperature and failed in a brittle manner at subambient temperatures. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 2643–2647, 2003     

Thermal degradation of poly(vinyl chloride) blends

Poly(vinyl chloride) was mixed with various poly(methacrylate)s and polycarbonates by combined precipitation from common solutions. The thermal stability of the samples was measured at 180°C under nitrogen, the HCl evolved was detected by conductometry. UV-Vis-spectra of degraded samples were measured to investigate the influence of the poly(methacrylate)s on the lengths of polyenes formed during the degradation of poly(vinyl chloride). The experiments show that the nature of the ester group is the dominating factor for the thermal stability of poly(vinyl chloride) in these blends. Poly(n-butylmethacrylate) exhibits the best stabilization for poly(vinyl chloride) in this series. Polycarbonates with a higher glass transition temperature than the temperature of degradation destabilize poly(vinyl chloride). Stabilization experiments with dibutyltin-bis(isooctylthioglycolate) show a costabilizing effect of the poly(methacrylate)s and polycarbonates.     

AS/NBR/HSB三元共混体系的动态硫化

采用动态硫化方法制备了丙烯腈-丁二烯共聚物/丁腈橡胶/高苯乙烯树脂（AS/NBR/HSB）三元共混热塑性弹性体，研究了NBR中丙烯腈质量分数，橡塑比和硫化剂对共混体系性能的影响。结果表明，动态硫化显著提高了共混材料的拉伸强度和扯断伸长率，酚醛树脂是AS/NBR，HSB共混体系比较理想的动态硫化交联剂；采用HSB，NBR，AS三元共混，共混材料的拉伸强度和扯断伸长率得到良好的平衡；差示扫描量热分析表明，该三元共混材料具有NBR和AS两相的玻璃化转变温度，说明该体系是典型的不相容体系。     

橡胶相结构特征对ABS树脂力学性能的影响

采用乳液聚合法合成了具有橡胶结构特征的丙烯腈丁二烯苯乙烯共聚物（ABS）,将其与苯乙烯丙烯腈共聚物（SAN）共混,制备了ABS/SAN共混物,并系统地研究了橡胶相结构特征的影响因素及其对共混物力学性能及其形变机理的影响。结果表明,随着聚丁二烯（PB）橡胶粒子粒径的增大,共混物的冲击强度提高,拉伸强度降低;随着橡胶粒子粒径的增大,共混物形变机理从单一的银纹向橡胶粒子空洞化诱发基体剪切屈服转变。     

Polyester resin as a compatibilizing agent for some polymeric blends

Dielectric and viscosity techniques were used to determine the degree of the compatibility of poly(methyl methacrylate)/polycarbonate, poly(methyl methacrylate)/ polystyrene, and polycarbonate/polystyrene blends in different ratios (25/75, 50/50, and 75/25 w/w). The effect of the addition of 5, 10, and 20% concentrations of the prepared polyester resin [poly(butylene terephthalate adipate)] on the compatibility of these blends was studied. The dielectric properties were measured over a frequency range (from 100 Hz to 100 kHz) at various temperatures covering the glass‐transition temperatures of the polymers used (from 30 to 170°C). It was found from the dielectric and viscosity measurements that the addition of 10% polyester to poly(methyl methacrylate)/polycarbonate, 20% polyester to poly(methyl methacrylate)/polystyrene, and 5% polyester to polycarbonate/polystyrene blends enhanced the degree of compatibility of such blends. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

PGMA／Al2O3填充环氧树脂灌封材料性能的研究

采用“Grafting from”的方法,制备了接枝微粒聚甲基丙烯酸缩水甘油酯／Al2O3（PGMA／Al2O3）。研究了PGMA/Al2O3及固化剂用量对环氧灌封材料的性能影响。利用扫描电镜观察了PGMA/Al2O3填充的环氧灌封材料的冲击断面的形貌。结果表明,对氧化铝粒子进行接枝改性后,复合粒子在环氧树脂灌封中得到良好的分散、增韧效果明显优于未改性的Al2O3,且在用量较少时就可明显提高环氧灌封材料的冲击强度。     

MBS树脂核壳结构的改善对其性能的影响

通过改进甲基丙烯酸酯-丁二烯-苯乙烯（MBS）共聚物的核壳结构,制备了新型MBS树脂,提高了MBS/聚氯乙烯（PVC）共混物的抗冲击性能、耐老化性能及加工塑化性能。