CaCO3增韧R—PVC材料的性能研究

用ＣａＣＯ３增韧Ｒ－ＰＶＣ复合材料，探讨了ＣａＣＯ３粒径，偶联剂种类对Ｒ－ＰＶＣ材料性能的影响。对冲击试样断口进行了ＳＥＭ分析。     

软聚氯乙烯的阻燃抑烟研究

本文借助氧指数法，差热分析，热重分析研究了Ａｌ（ＯＨ）３，Ｍｇ（ＯＨ）２，Ｓｂ２Ｏ３对软质ＰＶＣ的阻燃作用和锌化合物对软ＰＶＣ的抑烟作用。结果表明，Ｓｂ２Ｏ３对软ＰＶＣ的阻燃效果优于Ａｌ（ＯＨ）３和Ｍｇ（ＯＨ）２的；由Ｓｂ２Ｏ３，ＣａＣＯ３和锌化合物组成的阻燃抑烟体系，对软ＰＶＣ具有良好的阻燃抑烟效果。     

纳米级CaCO3填弃PVC／CPE复合材料研究

探讨了内米级ＣａＣＯ３粒子增韧增强ＰＶＣ／ＣＰＥ基理,研究了纳米级ＣａＣＯ３与轻质ＣａＣＯ３用量对ＰＶＣ／ＣＰＥ体系力学性能的影响。结果表明：纳粘级ＣａＣＯ３用量为５％～１２％时体产伸强主菩工都有明显提高,起到了增韧、增强的双重效果。轻质ＣａＣＯ３填充ＰＶＣ／ＣＰＥ体系基本未见地韧效果,同时,随着轻质ＣａＣＯ３用量的增加,体系的拉伸强度和断裂伸长率明显降低。     

纳米级CaCO3填充PVC/CPE复合材料研究

探讨了纳米级ＣａＣＯ３ 粒子增韧增强ＰＶＣ／ＣＰＥ 基理,研究了纳米级ＣａＣＯ３ 与轻质ＣａＣＯ３ 用量对ＰＶＣ／ＣＰＥ 体系力学性能的影响。结果表明：纳米级ＣａＣＯ３ 用量为５ ％ ～１２ ％ 时体系拉伸强度,冲击强度都有明显提高,起到了增韧、增强的双重效果。轻质ＣａＣＯ３ 填充ＰＶＣ／ＣＰＥ 体系基本未见增韧效果,同时,随着轻质ＣａＣＯ３ 用量的增加,体系的拉伸强度和断裂伸长率明显降低。     

偶联剂处理透闪石在硬质PVC中的应用

介绍了把经过偶联剂处理的透闪石填充到硬质ＰＶＣ中去，通过与重质ＣａＣＯ３、轻质ＣａＣＯ３填充硬质ＰＶＣ进行各种性能对比，基本性能均优于ＣａＣＯ３填充材料，从而证实了透闪石填充硬质ＰＶＣ的可行性。     

透闪石在硬质PVC中的应用研究

介绍了把经过偶联剂处理的透闪石填充到硬质ＰＶＣ中去，通过与重质ＣａＣＯ３、轻质ＣａＣＯ２填充硬质ＰＶＣ进行各种性能对比，基本性能均优于ＣａＣＯ３填充材料，从而证实了透闪石填充硬质ＰＶＣ的可行性。     

纳米级CaCO3粒子对PVC增韧增强研究

根据非弹性体增韧改性观点,研究了粒径为１μｍＣａＣＯ３及３０ｎｍＣａＣＯ３粒子填充ＰＶＣ,ＰＶＣ／ＡＣＲ体系的性质,并对其断口进行了电镜观察。结果表明,粒径为１μｍ ＣａＣＯ３对ＰＶＣ,ＰＶＣ／ＡＣＲ增韧增强效果不如粒径为３０ｎｍ ＣａＣＯ３。同时,ＡＣＲ的加入使体系加工性能变好。     

PVC／NBR再生胶共混型热塑性弹性体的研究

用ＰＶＣ与ＮＢＲ再生胶高温机械共混,制备了具有交联结构的、Ｔｇ约１０℃的热塑性弹性体。讨论了共混比、第三组分改性剂合成橡胶（ＮＢＲ,ＰＵ,ＣＲ,ＣＰＥ）、５种硫化体系、填充剂（炭黑、白炭黑、重质ＣａＣＯ３）、增塑剂邻苯二甲酸二辛酯等因素对性能的影响。结果表明：ＰＶＣ６０份,ＮＢＲ再生胶４０份,ＮＢＲ３６０４２０份,硫磺０．５份,促进剂ＴＭＴＤ和促进剂ＣＺ各０．６￣０．９份及适量重质ＣａＣＯ３和增塑     

偶联剂处理石英在硬质PVC中的应用

介绍了把偶联剂处理的石英填充到硬质ＰＶＣ中去，通过与ＣａＣＯ３填充硬质ＰＶＣ进行各种性能对比，基本性能均优于ＣａＣＯ３填充材料，从而证实了石英填充硬质ＰＶＣ的可行性。     

CaCO3在PVC电缆粒料中的应用

在ＰＶＣ电缆粒料的生产与开发中，通过对填充不同ＣａＣＯ３的对比试验，证证分析了填充料ＣａＣＯ３在ＰＶＣ电缆粒料中所起的作用和经济效应。     

SBS及Elvaloy741用于PVC共混改性体系的研究

研究了PVC/SBS/Elvaloy741(Elvaloy 741为乙烯-醋酸乙烯酯-一氧化碳的三元共聚物)、PVC/SBS和PVC/Elvaloy 741共混体系。对不同配比的共混物的物理机械性能进行了测试,分析讨论了弹性体SBS、Elvaloy 741和SBS/Elvaloy741对PVC的增韧效果和机理。     

苯乙烯和甲基丙烯酸甲酯梯度共聚物的应用

将用原子转移自由基聚合及连续补加甲基丙烯酸甲酯（MMA）的方法制备的苯乙烯（St）/MMA梯度聚合物P（Pt-t-MMA）作为增容剂应用于聚氯乙烯/苯乙烯-丁二烯-苯乙烯嵌段共聚物（PVC/SBS）和PS/PMMA聚合物合金的增容和改性。扫描电镜结果表明,P（St-t-MMA）可以改善PVC/SBS和PMMA/PS合金的相容性。PVC/SBS合金中加入少量P（St-t-MMA)后,冲击强度从6.0kJ/m^2提高到12.1kJ/m^2,加工流变性能得到了改善。SBS用量也影响PVC/SBS合金的冲击强度。     

马来酸酐接枝SBS增容PVC／SBS的研究

马来酸酐接枝苯乙烯－丁二烯＝苯乙嵌段共聚物（ＳＢＳ）用ＭＳＢＳ代表,以它为增容剂,研究了ＳＢＳ对聚氯乙烯（ＰＶＣ０的共混增韧改性。结果表明：ＭＳＢＳ能明显改善ＳＢＳ与ＰＶＣ的相容必 分散相ＳＢＳ相区尺寸明显减小,分布更均匀,共混物的玻璃化转变温度内移,常温和低温下缺口冲击强度增大。当ＰＶＣ／ＳＢＳ／ＭＳＢＳ为７５：２５：４时,共混物的常温缺口冲击强度为５８．３ｋＪ／ｍ＾２,低温（－２０℃）缺口冲击     

PVC/SBS/MBS三元共混体系的力学性能及光学透明性研究

采用冲击实验、拉伸实验、超景深三维显微镜、扫描电镜和分光光度计等手段，对PVC／SBS／MBS三元共混体系的冲击强度、拉伸强度、形态结构以及光学透明性等进行了研究。实验结果表明，MBS能有效改善PVC／SBS共混体系的界面相容性。当SBS和MBS的总量不变时，随着MBS相对含量的增加，共混体系的缺口冲击强度逐渐增加，透光率在m（MBS）／m（SBS）=28／80时达到最大值，光学透明性能最好。     

Study of the phase morphology and toughness in poly (vinyl chloride)/acrylonitrile–styrene-acrylic/styrene–butadiene–styrene ternary blends influenced by interfacial/surface tension

The effect of interfacial interaction on the phase morphology and toughness of poly (vinyl chloride) (PVC)/acrylonitrile–styrene-acrylic (ASA) terpolymer/styrene–butadiene–styrene (SBS) block copolymer ternary blends has been investigated. Water and diiodomethane liquids were used for static contact angle measurements to get surface tension and calculate interfacial tension. A dispersed phase morphology of ASA and SBS in the PVC matrix was predicted by the spreading coefficient theory, which was calculated through interfacial tensions between different polymer pairs. Extraction experiment and scanning electron microscopy were combined to verify this morphology. When the volume fraction of SBS was small, SBS was dispersed in the matrix as droplets and the strong PVC/styrene–acrylonitrile interfacial interaction made up for the poor interfacial adhesion between SBS and PVC. Herein, SBS showed an effective toughening effect on PVC/ASA blends. With the addition of 2.5- and 5-phr SBS, the blends had the highest impact strength of 88.75 kJ/m² at 23 °C and 9.98 kJ/m² at 0 °C, respectively. With the further increase of the SBS content, the diameter of the SBS drops increased largely and the poor interfacial adhesion between SBS and PVC played a leading role, resulting in a sharp decrease in toughness and a sharp ductile–brittle transition. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 47721.     

氯化聚乙烯增容剂

叙述了氯化聚乙烯的结构、增容原理及氯含量为35%的氯化聚乙烯弹性体作为不相容聚合物共混物增容剂的应用。着重介绍了氯化聚乙烯在PVC/PE、PVC/PP、PVC/EPDM、PVC/SBS、SBR/HDPE/PVC、丁腈再生胶/SBR等不相容聚合物共混体系中的实际应用。     

Synthesis of amphiphilic graft copolymers of SBS with acrylamide and study of their properties

Graft copolymerization of SBS in the form of sodium ionomer with acrylamide in emulsion using benzoyl peroxide as initiator and sodium ionomer of maleated SBS as a self‐emulsifier, which can form a stable cyclohexane/water emulsion with AM without using any other emulsifier, was carried out. Factors affecting the graft copolymerization were studied. The grafting % can reach about 15%. Emulsifying properties of sodium ionomer of maleated SBS and the graft copolymer, as well as the compatibilizing effect of the graft copolymer in blending polyvinyl chloride (PVC) with SBS, were studied. The sodium ionomer of maleated SBS, the graft copolymers, and the blends were characterized with IR and DSC. The results showed that water absorbency and emulsifying volume increase obviously after graft copolymerization with AM. 0.2 g of the graft copolymer containing 14 wt % PAM grafts can emulsify a mixture of 30 mL toluene and 70 mL water completely. The graft copolymer can be used as an effective compatibilizer in the blending of PVC and SBS, more effective than the sodium ionomer of maleated SBS. Only 2 wt % of the copolymer based on the blend used in blending is enough to raise the tensile strength three times. The blends with weigh ratios of PVC/SBS at 3/7–4/6 in the presence of the graft copolymer behave as thermoplastic elastomers with a tensile strength of 14 MPa, an ultimate elongation of 750%, and a permanent set of 17%. Glass transition temperatures of the blend shifted inward in the presence of the graft copolymer. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97: 1248–1253, 2005     

氯化聚乙烯的研究与应用

综述了溶剂法、水相悬浮法和固相氯化法制备氯化聚乙烯(CPE)的特点。介绍了具有不同氯含量及结构的CPE性能及其在塑料、橡胶等领域的应用。重点阐述了在低密度聚乙烯／聚氯乙烯(PVC)、PVC／苯乙烯-丁二烯嵌段共聚物(SBS)、乙烯,乙烯-乙酸乙烯,炭黑共混体系和氯丁橡胶,甲基丙烯酸甲酯(MMA)、SBS／MMA接枝体系引入CPE对体系的增容、稳定、协同作用：以及CPE作为第三组分在高密度聚乙烯／PVC／CPE、苯乙烯-丙烯腈／CPE共混体系中对共混物形态、机械性能和流变性能的影响。     

BR/PVC/SBS三元橡塑热塑性弹性体的配方设计及工艺研究

介绍了用动态硫化法挤出制备丁腈橡胶／聚氯乙烯／苯乙烯丁二烯苯乙烯共聚物（ＢＲ／ＰＶＣ／ＳＢＳ）三元橡塑热塑性弹性体,并采用ＤＳＣ、ＳＥＭ、布拉本达流变仪和力学方法研究其工艺条件、配方组成与结构、性能的关系。本研究的ＢＲ／ＰＶＣ／ＳＢＳ三元橡塑热塑性弹性体综合了ＰＶＣ、ＳＢＳ、ＢＲ三者的优点,可用于高档鞋料。     

PVC／TPU／SBS—g—MMA共混体系研究

制备了ＳＢＳ－ｇ－ＭＭＡ系列接枝共聚物,并对其进行了表征。以ＳＢＳ－ｇ－ＭＭＡ作为ＰＶＣ／ＴＰＵ共混体系的增容剂,对不同配比的ＰＶＣ／ＴＰＵ／ＳＢＳ－ｇ－ＭＭＡ共混体系的物理力学性能、流变性等进行了研究。结果表明,ＳＢＳ－ｇ－ＭＭＡ接枝共聚物对ＰＶＣ／ＴＰＵ共混体系起到了明显的增容作用。