羧基丁腈胶粉／聚氯乙烯共混型热塑性弹性体的制备

采用羧基丁腈胶粉（CNBRP）与聚氯乙烯（PVC）高温机械共混,制备共混型热塑性弹性体。红外光谱分析表明,在与聚氯乙烯共混时,羧基丁腈胶粉的羧基基团之间发生反应。选择PVC100,CNBRP40及其助剂,可以制备具有良好力学性能,耐油性、耐溶剂性的热塑性弹性体。扫描电镜显示CNBRP/PVC共混体系具有较好的相容性。     

聚氯乙烯/废胶粉热塑性弹性体的性能研究

利用反应加工技术制备了聚氯乙烯／废胶粉热塑性弹性体，并就实验工艺，增容剂种类及用量，增塑剂DOP用量，废胶粉粒径及用量对材料性能的影响进行了研究，对增容机理进行了初步探讨。结果表明，反应加工时间存在一个最佳值；NBR，CPE均可作为该热塑性弹性体的增容剂，两者并用时其增容效果较好，含有硫黄的NBR混炼胶效果更好，聚氯乙烯／废胶粉质量比为40／60－60／40时材料的综合性能最佳。     

聚氯乙烯／粉末丁腈胶共混型热塑性弹性体的研究

本文将粉末丁腈胶Chemigum P83与聚氯乙烯共混,研究了橡胶为主时体系的物理机械性能,并与动态硫化的聚氯乙烯/丁腈胶共混物进行了比较。结果表明,用粉末丁腈胶与聚氯乙烯共混可方便地制得性能优良的热塑性弹性体。     

羧基丁腈胶粉改性热塑性聚酯弹性体的性能

采用熔融共混工艺制备了热塑性聚酯弹性体(TPEE)/羧基丁腈胶粉(XNBR)共混物,研究了共混物的相态结构、拉伸性能及动态流变性能。扫描电子显微镜(SEM)观察表明,羧基丁腈胶粉用量不超过5%(质量分数)时能在TPEE基体中分散成纳米尺寸,含量高时则出现团聚现象。少量羧基丁腈胶粉可以实现对TPEE的增强增韧,强度可提高13.6%。动态流变性能测试表明,加有羧基丁腈胶粉的共混体系复数黏度都比纯TPEE有大幅提高;低含量羧基丁腈胶粉的共混体系储能模量和损耗模量同纯TPEE相差不大。     

PVC／胶粉热塑性弹性体的制备与性能研究

以聚氯乙烯(PVC)和胶粉为主要原料,采用共混的方法制备了PVC／胶粉热塑性弹性体,研究了胶粉的改性剂、PVC的改性剂和胶粉的用量等对PVC／胶粉热塑性弹性体性能的影响,并与国标GB／T 18173.1–2012所要求的性能进行比对。研究结果表明,使用橡胶再生剂RV改性胶粉所制得的PVC／胶粉热塑性弹性体综合性能最优;使用乙烯–乙酸乙烯酯塑料(EVAC)、苯乙烯–丁二烯–苯乙烯塑料(SBS)改性PVC时,EVAC的改性效果优于SBS,使用15份EVAC所制得的PVC／胶粉热塑性弹性体具有更佳的力学性能、耐老化性能,且满足国标要求;随着胶粉用量的增加,PVC／胶粉热塑性弹性体的综合力学性能下降,耐老化性能提高,使用30份改性胶粉时性价比最高,同时满足国标GB／T 18173.1–2012要求。     

羧基丁腈胶粉改性聚氨酯弹性体的性能研究

采用熔融共混工艺制备了热塑性聚氨酯弹性体(TPU)/羧基丁腈胶粉(XNBR)共混物,研究了共混物的相态结构、力学性能及动态流变性能。透射电子显微镜(TEM)观察表明,羧基丁腈胶粉用量不超过5%时能在TPU基体中分散成纳米尺寸,高含量时则存在大量聚集体。少量羧基丁腈胶粉可以实现对TPU的增强增韧,使TPU强度提高10%,低温冲击强度提高56%。动态流变性能研究表明,加入羧基丁腈胶粉,体系的复数黏度、储能模量和损耗模量均增大。     

CR/HPVC热塑性弹性体的性能研究

选用氯丁橡胶（CR）和高聚合度聚氯乙烯（HPVC）为主体材料，用动态硫化法制备了一类性能优异的材料－CR／HPVC共混型热塑性弹性体（TPE）。研究了共混方法、硫化温度、硫化体系、硫化剂用量及硫化时间等因素对动态硫化CR／HPVC热塑性弹性体力学性能的影响。     

动态硫化了腈橡胶／酚醛树脂共混型热塑性弹性体性能的研究

用动态硫化法制备了丁腈（ＮＢＲ）／酚醛树脂（ＰＦ）共混型热塑性弹性体。研究了ＮＢＲ中丙烯腈含量、ＰＦ品种、橡塑并用比和硫化体系对共混物性能的影响。研究结果表明：随ＮＢＲ中丙烯腈含量的增加，共混物的强度有所提高；随ＰＦ用量的增加，共混物的拉伸强度显著提高，耐油性能和老化性能均得到明显提高：硫磺硫化体系可使ＮＢＲ／ＰＦ并用体系硫化胶有较好的物理机械性能。     

废胶粉/聚丙烯热塑性弹性体的界面增容研究

采取多种相容剂和反应加工手段，设计轮胎胎面废胶粉（WRP）与聚丙烯（PP）体系的不同界面，旨在制备出性能优异的热塑性弹性体（TPE）。研究了纯WRP／纯PP、三元乙丙橡胶（EPDM）包覆WRP／纯PP、丁苯吡橡胶（BSPR）包覆WRP／接枝马来酸酐聚丙烯（MPP）／PP、特殊高分子相容剂（SMC）包覆WRP／纯PP、原位接枝胺基WRP／MPP／PP、动态接枝纯WRP／纯PP等六种体系制备的TPE的性能，WRP／树脂质量比为70／30。结果表明，采用后三种体系制备的TPE性能优良，已经接近天然橡胶／聚丙烯TPE的性能水准，但WRP必须用酚醛树脂进行改性。据此，提出强界面和合适的界面模量过渡是制备废胶粉／树脂热塑性弹性体的关键。TEM的相态研究表明：胶粉的分散粒径在几到十几个微米之间，较原始粒径有很大的细化。     

橡胶改性聚氯乙烯的研究

本文以过氧化二异丙苯为交联剂将聚氯乙烯/丁腈胶共混物进行动态硫化,探讨了交联剂用量对制品的凝胶含量和性能的影响。研究表明,聚氯乙烯和丁腈胶均参与了交联并形成整体网络,制品具有热塑性弹性体的良好性能     

Blends of plasticized poly(vinyl chloride) and waste flexible poly(vinyl chloride) with waste nitrile rubber powder

Blends of poly(vinyl chloride) (PVC) with varying contents of plasticizer and finely ground powder of waste nitrile rubber rollers were prepared over a wide range of rubber contents through high‐temperature blending. The effects of rubber and plasticizer (dioctyl phthalate) content on the tensile strength, percentage elongation, impact properties, hardness, abrasion resistance, flexural crack resistance, limiting oxygen index (LOI), electrical properties, and breakdown voltage were studied. The percentage elongation, flexural crack resistance, and impact strength of blends increased considerably over those of PVC. The waste rubber had a plasticizing effect. Blends of waste plasticized PVC and waste nitrile rubber showed promising properties. The electrical properties and LOI decreased with increasing rubber and plasticizer content. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 91: 1552–1558, 2004     

软质PVC／NBR共混材料改善电冰箱门封的低温弹性

研究了丁腈橡胶（ＮＢＲ）弹性体对软质聚氯乙烯低温弹性及力学性能的影响,并探讨了该共混竽电冰箱门封的加工工艺性及其优点。     

氢化丁腈橡胶与聚氯乙烯或聚乙烯共混

研究氢化丁腈橡胶（HNBR）与聚氯乙烯（PVC）或聚乙烯（PE）的共混，该HNBR是用偶氨法常压氢化丁腈胶乳制得的。共混物的力学性能表明，在HNBR质量分数为40％以上时，2种共混物均呈现热性橡胶性能。HNBR／PVC共混物在拉伸强度方面呈现加和关系。热老化后HNBR／PE共混物的力学性能比NBR／PE共混物的好得多。用扫描电镜观察HNBR／PE 混物的断面形态。并用DSC曲线研究了HNBR／PE共混物的结晶变化。     

Studies on morphology,mechanical properties and failure mode of blends of plasticized poly(vinyl chloride) and thermoplastic copolyester elastomer

Morphology and mechanical properties of blends of plasticized poly(vinyl chloride) (PVC) and thermoplastic copolyester elastomer (Hytrel 40D) have been studied with special reference to the effect of blend ratios. Morphology of the blends indicates that the Hytrel phase is dispersed as domains in the continuous PVC phase up to 75 percent of its concentration. Dynamic mechanical analysis of the blends shows marginal level of compatibility between the two phases. The mechanical properties depend on the proportion of thermoplastic rubber in the blend. Attempts have been made to correlate the blend morphology with properties. Failure surfaces were examined by scanning electron microscope and it was found that the fractographs depend on the type of failure (tensile or tear) and on the blend composition.     

改性矿物填料增强橡胶/聚氯乙烯共混体系

研究了橡胶、增塑剂、矿物填料和表面处理剂对橡胶／聚氯乙烯(PVC)共混物力学性能的影响，用扫描电镜分析了有机胺类表面处理剂改性高岭土／丁腈橡胶(NBR)／PVC的界面结合状况。结果表明，当NBR用量为30份，邻苯二甲酸二辛酯用量为60份，有机胺类表面处理剂质量分数为3％，填充60份的超细碳酸钙或高岭土或牌号为SMF的蒙脱土时，可得到力学性能较佳的NBR／PVC共混物；不同矿物填料对NBR／PVC共混物的增强作用不同，经有机胺类表面处理剂改性后，以超细碳酸钙、高岭土和蒙脱土SMF的增强效果最为明显。     

Polyblends. I. Mechanical properties of polyblends of butadiene–acrylonitrile elastomers and copolymers of vinyl stearate and vinyl chloride

Several nitrile rubber elastomers were polyblended, across the composition range, with selected polymeric compositions containing vinyl chloride. The compositions incorporated were (a) bulk poly(vinyl chloride) (PVC); (b) copolymers of vinyl stearate and vinyl chloride containing, respectively, 0.21, 0.36, and 0.47 weight fraction of the vinyl ester; and (c) mixtures containing the same weight fractions of di-2-ethylhexyl phthalate (DOP) with PVC. Mechanical, viscoelastic, optical, and volatility properties were studied on all blends in this first paper. To accurately compare the mechanical properties of polyblends of different systems, a criterion of mechanical equivalence was taken as the observance of similar stresses at break for compositions selected to have identical 100% moduli. Optimum mechanical equivalence, therefore, occurred at the largest ratios of 100% modulus to break stress for all systems compared. Optimum mechanical property equivalence was observed for NBR blends with PVC and for similar blends of both internally and externally plasticized systems containing 0.21 weight fraction of plasticizer. However, considerably more nitrile rubber was needed for PVC blends to acquire the properties of the plasticized systems. Mechanical equivalence was observed, but was not optimum for systems having more plasticizer because tensile strengths were lower. Polyblending with NBR improved the toughness and low-temperature properties of starting vinyl stearate copolymers. Improved toughness was indicated by the expansion of areas under stress–strain curves. Refractive index matching appeared to explain the transparency of the best films and their relative freedom from haze. On heating at 85°C, poly(vinyl chloride) and the copolymer polyblends suffered no volatility loss. Volatility of DOP from the blends was 1.5 times greater than for PVC–DOP mixtures. Because modulus–temperature curves and mechanical T_g values of the filler component shifted with composition, the mechanical behavior of these blends was in harmony with an accepted standard of interdomain compatibility.     

新型粉末丁腈橡胶对PVC的改性作用

研究了具有包藏结构的新型改性剂粉末丁腈Ｐ－６５对聚氯乙烯（ＰＶＣ）性能的影响。结果表明。当Ｐ－６５的加入量为２０份时，材料的断理解伸长率和拉伸哟度均达到最大值。其断裂伸率长率为加Ｐ－６５体系的２倍。光学分析法对共混体系作的初步探讨认为。Ｐ－６５能够比较均匀地分散在ＰＶＣ树脂中，ＰＶＣＫ中的氯原子与Ｐ－６５中的腈基可能存在特殊相互作用。同时，对加工方式的影响进行了研究。发现塑炼比挤出对增强材料的性能     

铅盐稳定剂对低卤阻燃PVC/PNBR热稳定性的影响

采用刚果红法研究了铅盐热稳定剂对低卤阻燃聚氯乙烯/粉末丁腈橡胶热塑性弹性体脱氯化氢热降解性的影响。结果表明:铅盐类热稳定剂在低卤阻燃PVC/PNBR热塑性弹性体中单独使用时,热稳定效果总体是三盐基硫酸铅>二盐基亚磷酸铅。当二盐基亚磷酸铅、三盐基硫酸铅并用时可提高体系的初始变色温度。     

阻燃,抗静电NBR／PVC热塑性弹性体的制备

用动态硫化法制备了具有阻燃、抗静电性能的丁腈橡胶／聚氯乙烯热塑性弹性体,研究了橡塑共混比、导电炭黑、阻燃剂、硫化剂用量以及返炼等对ＴＰＥ的导电性、阻燃性及力学性能的影响。结果表明,为得到综合性能较好的热塑性弹性体,较适宜的制备条件为ＮＢＲ／ＰＶＣ配比为６０／４０、导电炭黑用量为３０、氢氧化铝用量为４０、硫黄用量为１．３。