马来酸酐接枝SBR增容改性PVC／SBR共混体的研究

采用化学接枝法和力化学接枝法制得马来酸酐（ＭＡＨ）接枝ＳＢＲ（ＳＢＲ－ＭＡＨ）作为ＰＶＣ／ＳＢＲ共混物的增容剂,并对不同方式的接枝物的增容效果进行了对比。     

表面活性剂增容PVC／SBR共混体系相容性研究

本文通过ＤＳＣ、振簧仪研究了聚氧化乙烯类表面活性剂作为增容剂对ＰＶＣ／ＳＢＲ共混物相容性的影响，并用扫描电镜（ＳＥＭ）观察了ＰＶＣ／ＳＢＲ共混物中橡胶分散相的形态结构和尺寸变化。结果表明，在ＰＶＣ／ＳＢＲ共混物中加入适量的表面活性剂可明显改善两相的相容性，橡胶分散相尺寸随表面活性剂用量、液体石蜡用量的变化而变化。     

表面活性剂增容PVC／SBR共混体系力学性能研究

通过冲击试验，应力－应变试验研究了表面活性剂用量，液体石蜡用量，注体石蜡用量，橡胶含量对ＰＶＣ／ＳＢＲ共混材料力学性能的影响。同时对表面活性剂增容ＰＶＣ／ＳＢＲ共混材料的形变机理进行了初步探讨。     

NBR／PVC共混胶在燃油胶管中的应用

探讨了德国拜耳公司乳液共沉法生产的NBR/PVC共混胶料填充各种常用配合剂后的物理性能的变化,介绍了NBR/PVC共混胶在耐燃油胶管中的应用配方和制造工艺。     

CPVC/PVC共混物性能研究

采用CPVC与PVC共混,研究共混物的力学性能和耐热性,并考察纳米CaCO3对其性能的影响.结果表明:随着CPVC含量的增加,共混物的拉伸强度、弯曲强度和耐热性能都有明显的提高,冲击强度则先增后减;随着CaCO3含量增加,共混物的冲击强度和耐热性能都逐渐提高,但拉伸强度和弯曲强度则呈下降趋势.     

Compatibilization of SBR/NBR Blends Using Poly Acrylonitrile as Compatibilizer

Blends of styrene-co-butadiene rubber (SBR) and acrylonitrile-co-butadiene rubber (NBR) were prepared and their rheological and mechanical properties were examined. The effect of the addition of 5 phr of poly acrylonitrile as compatibilizer on the compatibility of the rubber blend was studied. Ultrasonic and scanning electron microscopy (SEM) techniques were used to assess the degree of compatibility of the blend. The results revealed that the use of the prepared compatibilizer has significantly resulted in the clear stability of the cure rate index (CRI) of the blends and that the tensile strength was improved at (50/50) SBR/NBR blend. The degree of compatibility was enhanced to a great extent.     

附聚SBR制备ABS改性剂及其增韧PVC的性能研究

研究了不同粒径SBR制备的ABS改性剂对PVC增韧的影响，发现随着SBR粒径的增大合金的光学性能降低，而缺口冲击强度呈先上升后下降趋势，当SBR粒径为225nm时达到最大值。考察了NaCl与NaOH体系对SBR附聚的影响，发现相同浓度NaOH的条件下，随着5wt％NaCl用量提高，SBR附聚后粒径显著增加。比较了扩径前后SBR制得的ABS／PVC性能发现：扩径后的SBR制得的ABS／PVC冲击强度上升显著，同时与扩径前小粒径SBR制备的ABS／PVC相比较，其光学性能没有明显下降。     

CPE/纳米SiO_2增容SBR/PVC热塑性弹性体的研究

研究了氯化聚乙烯（CPE）、CPE／纳米Si02增容丁苯橡胶／聚氯乙烯（SBR／PVC）共混型热塑性弹性体（TPV）的力学性能、耐溶剂性能和耐热变形性能,并用扫描电镜（SEM）分析了TPV的断面微观形态结构。结果表明,CPE／纳米SiO2的加入,细化了交联SBR分散相,改善了SBR在PVC中的分散性,有效提高了SBR与PVC的相容性;当CPE和纳米SiO2的质量分数分别为5％和9％时,增容效果好,与未增容TPV相比,增容TPV的断裂拉伸强度和撕裂强度分别增加了165．7％和108．8％,耐溶剂性能和耐热变形性能也明显提高。     

The Compatibilization of EPDM/SBR Blends by EPDM-Graft-Styrene Copolymer

Abstract

Ethylene propylene diene rubber (EPDM) and styrene butadiene rubber (SBR) blends were compatibilized by a graft copolymer EPDM-graft-styrene. This compatibilizer was prepared by gamma radiation induced grafting of EPDM with styrene monomer. The compatibilized blends were evaluated by scanning electron microscope and dielectric properties. The obtained results reveal that the addition of a small percentage of graft copolymer to EPDM/SBR blends improves the physico-mechanical properties of the blend vulcanizates, and this can be related to the enhancement of the blend compatibility.     

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     

相容剂对CF/PA6共混物结构与性能的影响

通过挤出共混法制备了CF/PA6/PP-g-MAH和CF/PA6/SMA复合材料。采用SEM、DSC、DMA及力学性能测试,研究了PP-g-MAH和SMA对CF/PA6(5/95)共混物的微观形态、结晶行为及力学性能的影响。结果表明:2种相容剂对CF/PA6共混物都有明显的增容作用,其中SMA的增容效果较好;共混物的拉伸强度、冲击强度、弯曲性能及储存模量显著提高,玻璃化转变温度向高温区移动;SMA和PP-g-MAH均能促进CF对PA6基体的异相成核作用。     

超细碳酸钙/粉末丁苯橡胶的制备及在PVC中的应用

本文用超细碳酸钙（CaCO3）作为隔离剂和不同的包覆剂,通过凝聚法制备粉末丁苯橡胶（PBSR）.当超细CaCO3与PBSR质量比为50/100,包覆剂Coron树脂结构组成中马来酸酐和苯乙烯质量比为7/3,用量占PSBR质量的9%时,所得的超细CaCO3/PSBR粒径小于1mm,比未加超细CaCO3的PSBR小一倍左右.当PSBR/PVC的质量比为15/100,CaCO3/PSBR与PVC混合制得复合材料的拉伸强度比PSBR与PVC制得复合材料提高了约15%,缺口冲击强度提高了60%左右.     

Application of Taguchi method in determining optimum level of curing system of NBR/PVC blend

Taguchi method is applied in this study to determine the optimum level of curing system (sulfur, MBTS, and CBS) in a NBR/PVC blend. By considering physicomechanical properties of cured NBR/PVC blend, optimum level of curing system is determined. A fixed master batch formulation of NBR/PVC is used, and the effect of curing system is studied on the physicomechanical properties of NBR/PVC blend, such as tensile strength (TS) and elongation‐at‐break (EB) before and after aging and also hardness and abrasion. The L9 orthogonal array that includes nine rows and four columns is applied. In this matrix, rows show the experiments and three columns show the amount of three factors (sulfur, MBTS, and CBS) and one column is left arbitrarily as an empty column. In this array, the columns are mutually orthogonal. The optimum physicomechanical properties of cured NBR/PVC blend are at 2 phr sulfur, 2 phr MBTS, and 0.5 phr CBS of curing system. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 5358–5362, 2006     

重质芳烃油在PVC/SBR共混型热塑性弹性体中的应用研究

用重质芳烃油代替部分ＤＯＰ作增塑剂，通过动态全硫化法制成了ＰＶＣ／ＳＢＲ共混型热塑性弹性体（ＴＰＥ）。试验了不同增塑剂的品种和用量对共混物性能的影响，结果表明：当ＰＶＣ／ＳＢＲ的配比为５５／４５、重质芳烃油与ＤＯＰ的并用比为３／２时，共混物的力学性能和工艺性能均可满足使用要求。     

Dielectric Properties of PVC Plasticized with Dioctyl Sebacate (DOS)

Abstract

The dielectric properties of PVC plasticized with dioctyl sebacate (DOS) was studied. The dielectric loss tangent was found to decrease for the plasticized samples which interpreted according to the increase in the intermolecular interactions upon plasticization. The plasticizer contribute to the dielectric strength not only via its own polarity but also by markedly changing the nature of the relaxation process. The calculated Frohlich-Kirwood “g” factor indicates that there is a strong interaction between the C-Cl group (of the polymer) and the C = O group (of the plasticizer).     

纳米SiO2改性NR/SBR共混胶的结构与性能研究

研究了纳米SiO2加入方式及用量对NR/SBR共混胶的正硫化时间、力学性能的影响,并研究了纳米SiO2改性前后共混胶的耐热分解性能、耐热空气老化性能及微观形态结构.结果表明:纳米SiO2的加入对共混胶的正硫化时间、力学性能及耐热稳定性能有较大影响;当纳米SiO2加入量为7％(质量分数)并采用NR/SBR共混均匀后先加入纳米SiO2,再加入小料、硫磺的方式制备NR/SBR共混胶时,纳米SiO2通过使NR/SBR共混胶的分散相细化并使共混胶的整体交联密度提高,有效地提高了NR/SBR共混胶的综合力学性能和耐热稳定性能,达到了对NR/SBR共混胶良好的补强改性效果.     

纳米碳酸钙在NR/BR/SBR并用胶中的应用研究

采用带有酚醛基的反应性有机改性剂对纳米碳酸钙CCR进行改性制得M-CCR,并制备了NR/BR/SBR/CCR和NR/BR/SBR/M-CCR复合材料,研究了两种复合材料的微观形态以及力学性能和加工性能。结果表明,M-CCR在并用胶中的分散性优于CCR,对并用胶力学性能的提高更显著;两种填料都能改善并用胶的加工性能,并且不影响并用胶的抗湿滑性和滚动阻力。     

影响PVC/PNBR热塑性弹性体力学性能的因素

以PVC聚合物为主的条件下制得PVC/PNBR热塑性弹性体,研究了PNBR、填料、第三组分以及增塑剂DOP的质量分数对热塑性弹性体力学性能的影响。     

PVC/SMAH共混物的研究

研究了聚氯乙烯（PVC）与（苯乙烯／马来酸酐）共聚物（SMAH）的共混改性,测定了共混物的冲击强度、熔体流动速率和维卡软化点。SMAH可以显著地提高PVC的熔体流动速率和维卡软化点,但共混物的制品冲击强度降低。加入第三组分（乙烯／乙酸乙烯酯）共聚物（E／VAC）后,PVC／SMAH共混物的制品冲击强度提高。结构分析表明,PVC／SMAH共混物体系是典型的两相体系。     

PVC木塑复合材料成型技术

介绍了废旧塑料再利用技术,探讨了PVC木塑复合材料的配方、工艺、制备及木粉的处理方法。结果表明:经处理的木粉,在PVC和木粉之间形成了较高强度的界面层,使木粉与基体树脂粘接力强,改善了材料的力学性能。