马来酸酐熔融接枝氯化聚乙烯

以过氧化二异丙苯、过氧化二苯甲酰、偶氮二异丁腈为引发剂,研究了引发剂及马来酸酐用量对熔融接枝氯化聚乙烯的接枝率、硫化工艺性及力学性能的影响,并用红外光谱表征研究了接枝结构及机理。制备了马来酸酐接枝氯化聚乙烯/聚乙烯共混物,通过共混物的性能考察了马来酸酐接枝氯化聚乙烯的自黏性,并采用差示扫描量热法、热重分析法和扫描电镜对共混物进行了热行为和形态的分析。结果表明,过氧化二苯甲酰引发马来酸酐接枝氯化聚乙烯的效果较好,组分最优配伍时(过氧化二苯甲酰1.6份,马来酸酐8份)接枝物的硫化工艺性、力学性能和热性能明显改善,硫化出现了典型的平坦区,拉伸强度达到16.7 MPa。共混物的力学性能和耐热性能均有所提高,接枝后氯化聚乙烯的自黏性有较大程度的改善。     

硅橡胶/氯化聚乙烯共混体系的制备及性能研究

采用机械共混法制备了硅橡胶/氯化聚乙烯共混体系。研究了氯化聚乙烯用量对共混体系力学性能、热稳定性、阻尼性能和相态结构的影响。结果表明:随氯化聚乙烯用量的增加,共混体系的力学性能和热稳定性出现降低的现象,但阻尼性能和材料之间的相容性有明显提高。当氯化聚乙烯用量为100份时,与纯硅橡胶相比,共混体系的有效阻尼温域从15℃拓宽到近50℃,最大损耗因子从0.11提高到0.43,玻璃化转变温度向高温偏移了30℃左右;硅橡胶和氯化聚乙烯也呈现出较好的相容性。     

氯化聚乙烯与天然橡胶的共混性能试验

叙述了氯化聚乙烯与天然椽胶的共混过程和共混胶的物理机械性能。     

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。     

氯化聚乙烯的性能及在橡胶制品中的应用

介绍氯化聚乙烯(CPE)的性能,氯化聚乙烯的性能取决于氯含量,同时与合成工艺有关。阐述氯化聚乙烯在橡胶制品中的应用,及与天然橡胶(NR)、丁腈橡胶(NBR)、三元乙丙橡胶(EPDM)共混胶的性能和应用。     

浅议氯化聚乙烯的开发

1 前言 氯化聚乙烯简称CPE,是由聚乙烯与氯气进行氯化反应后制得的一种新型高分子材料,外观为白色粉末。按其应用领域的不同可分为两大系列:一种是热塑性树脂,另一种是弹性体橡胶。由于氯化聚乙烯具有优良的抗冲性、阻燃性、耐老化性和耐寒性以及耐油、耐热等特性,极广泛应用于塑料共混改性加工、软制品的增塑、橡胶加工及电缆工业中,     

硅橡胶/氯化聚乙烯泡沫合金材料的阻尼性能研究

采用机械共混法制备了硅橡胶/氯化聚乙烯泡沫合金材料,研究了硅橡胶/氯化聚乙烯共混胶相容性及热处理时间对泡沫合金材料密度、泡孔结构及阻尼性能的影响。结果表明,硅橡胶/氯化聚乙烯共混胶具有较好的相容性;与实心共混胶相比,泡沫合金材料的阻尼性能显著提高,损耗因子从0.43提高到0.68,损耗因子大于0.3的有效阻尼温域从16℃拓宽到45℃,玻璃化转变温度向高温偏移了13℃左右;当受到热处理之后,泡沫合金材料的阻尼性能降低。     

氯化聚乙烯的应用

介绍了氯化聚乙烯（ＣＰＥ）作为高分子改性剂在改性聚氯乙烯（ＰＶＣ）、聚乙烯（ＰＥ）、丙烯腈－丁二烯－苯乙烯共聚物（ＡＢＳ）、乙烯－醋酸乙烯共聚物（ＥＶＡ）、ＰＥ／ＰＶＣ共混体系和橡胶等方面的应用情况。     

固相法氯化聚乙烯增韧聚氯乙烯的研究──氯化聚乙烯的氯含量、制备条件与增韧聚乙烯性能的关系

本文研究了固相氯化法制备的氯化聚乙烯（ＣＰＥ）和ＰＶＣ／ＣＰＥ共混物的机械特性。氏考察了ＣＰＥ氯含量、氯化条件如聚乙烯晶区与非晶区氯化程度比、氯化过程中热处理条件、氯化温度等对聚氯乙烯（ＰＶＣ）增韧效果的影响。共混前后的物理力学性能变化表明，不仅氯含量、而且氯化聚乙烯的制备条件对ＰＶＧ的增韧效果有着很大的影响，而分子量对性能影响不大。因相法ＣＰＥ与悬浮法ＣＰＥ对ＰＶＣ的增韧效果相当，ＣＰＥ用量为７—１５ｐｈｒ时，增韧效果尤为突出。形态结构的表征结果说明共混物是微观上的相分离，具有优良增韧效果的体系为ＣＰＥ是均匀连续同分布于ＰＶＣ粒子表面。     

废农用聚乙烯薄膜固相氯化制备氯化聚乙烯的研究

本文研究了以废农用聚乙烯薄膜(WPE)为原料,固相氯化法制备氯化聚乙烯(CWPE)的工艺。研究了氯化温度、氯含量、引发剂、分散剂等因素对CWPE性能的影响。并通过红外光谱的研究阐述了CWPE结构与性能的关系。对CWPE的开发应用泎了简要的介绍。以固相法对废聚乙烯薄膜进行氯化制备氯化聚乙烯的研究,国内外至今尚未见报道。     

PC改性高氯聚乙烯防腐蚀涂料的研制

采用酯化型环氧树脂（ＰＣ）与高氯聚乙烯（ＨＣＰＥ）共混,制得ＰＣ改性ＨＣＰＥ防腐蚀涂料,可作为氯磺化聚乙烯（ＣＳＭ）防腐蚀涂料的替代品种。介绍了ＰＣ改性ＨＣＰＥ防腐蚀底漆、面漆的配方及生产工艺。列举了该涂料与ＣＳＭ防腐蚀涂料的性能对比。讨论了溶剂、改性树脂、颜填料对涂料性能的影响。     

A study on poly(vinyl chloride) blends with chlorinated polyethylene and polyethylene

By means of a twin-roll masticator and Brabender rheometer, the effect of chlorinated polyethylene (CPE) and polyethylene (PE) on the impact strength and processability of poly(vinyl chloride) (PVC) was studied. The experimental results show that CPE can promote the plasticity of PVC and the effect increases with the amount of CPE. Addition of a small amount of PE in PVC/CPE (100/12) makes an impressive improvement in the impact strength of the mixture. The impact strength of PVC/CPE/PE (100/ 12/2.5) at 20°C is 30.0 kJ/m² higher than that of PVC/CPE (100/12). The dynamic viscoelastic spectra, tensile strength, and elongation test reveal that CPE is incompatible with PVC but may act as a compatibilizer for PVC/PE. The disperse state of the polyblend was studied by differential scanning calorimetry (DSC); it was found that the mixing sequence has an influence on the impact strength of the blend.     

高透低摩擦CPE薄膜的制备及性能研究

采用三层共混挤出流延工艺,以聚乙烯树脂为原料,添加开口爽滑双功能母粒(PE-014S)制备高透低摩擦流延聚乙烯(CPE)薄膜.通过对薄膜光学性能、力学性能及摩擦性能测试,当PE-014S添加量为3份时,CPE薄膜透光率为92.8％,雾度为1.5％,光泽度为93.2 GU,纵向拉伸强度为21.3 MPa,横向拉伸强度为2...     

改性高氯化聚乙烯材料的合成与应用

叙述了高氯化聚乙烯(HCPE)的研究进展,介绍了HCPE常见的合成方法、常用的改性添加剂和改性方法,阐述了各添加剂在改性HCPE时的作用,分析了HCPE的应用领域及其在应用中存在的问题和解决方法.     

少量PS对H-PVC/CPE/PE共混体系性能的影响

本文研究了在H-PVC/CPE/PE共混体系中添加少量刚性有机粒子PS对体系性能的影响。在PVC/CPE/未交联PE的配比为100/6/5时,添加少量(1～3份)PS粒子,能使体系的冲击强度成倍增加,拉伸强度基本不变。在PVC/CPE/动态微交联PE的配比为100/6/5时,添加少量PS粒子,出现与PS改性PVC/CPE/未交联PE体系类同的规律性,并且效果更好,冲击强度可高达86kJ/m~2,拉伸强度最高达48MPa。共混方式对PVC/CPE/PE/PS体系的性能影响较大,其中以四步法的效果最佳,不仅冲击强度提高幅度最大,拉伸强度也达到了最大值。     

废旧塑料回收中的共混技术应用

通过对废旧塑料回收方法的分析 ,提出了在物理回收中应用共混技术 ,可以提高产品性能和产品附加值 ,降低成本。并着重探讨了塑料回收中PVC/CPE、PS/SBS、PP/LDPE、PVC/PE/CPE等体系的共混方法。     

PE氯化接枝St/AN共聚共混物研究

采用固相法对聚乙烯(PE)进行氯化接枝苯乙烯/丙烯腈(St/AN)单体,制得了改性氯化聚乙烯(CPE)材料。探讨了氯化反应温度、氯含量、引发剂过氧化苯甲酰(BPO)用量和单体配比对聚合物力学性能的影响,实验中还对PE接枝了不同单体,结果表明,采用二段温度(70℃,120℃)法,氯质量分数为35%,BPO加入质量为0.24g,m(St)/m(AN)为1:1时,可制得力学性能较好的CPE材料。极性单体MA、AN及St的加入提高了CPE材料的拉伸强度。     

Graft‐modified HCPE with methyl methacrylate by the mechanochemistry reaction. II. Physical‐mechanical properties and processability

In this article, the physical‐mechanical properties and processability of graft‐modified highly chlorinated polyethylene (HCPE; chlorine contents: ≥ 60%) with methyl methacrylate (MMA) by mechanochemistry reaction were studied. The results showed that the HCPE‐g‐MMA system is superior to unmodified HCPE in physical‐mechanical properties, particularly in processability. In addition, the HCPE‐g‐MMA system, with about 62% chlorine content, was the same as PVC in its physical‐mechanical properties. The HCPE‐g‐MMA system, with about 65.5% chlorine content, is the same as chlorinated poly(vinyl chloride) (CPVC) in its physical‐mechanical properties, except that the Vicat softening temperature and processability of HCPE‐g‐MMA system are superior to PVC and CPVC. Compared with PVC and CPVC, the HCPE‐g‐MMA system proves better due to its lack of a toxic monomer. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 91: 282–287, 2004     

In situ reactive compatibilization in polymer blends: Effects of functional group concentrations

Polystyrene (PS) and polyethylene (PE), along with their reactive counterparts, i.e., polystyrene having oxazoline reactive groups (OPS) and polyethylene with carboxylic acid groups (CPE), were melt blended in a Rheomix mixer. These blends were prepared by mixing these polymers in various proportions under a variety of conditions. In an alternate procedure the OPS, CPE graft polymer (OPS-g-CPE) was prepared by melt blending these two polymers beforehand, and subsequently this grafted polymer was used as a compatibilizer for PS–PE blends. The effects of the addition of OPS and CPE, on the one hand, and OPS-g-CPE, on the other hand, on the compatibility of PS–PE blends were investigated. The morphology of these blends was examined with a scanning electron microscope (SEM) and related to their tensile properties. The PS–PE blends are found to have the typical coarse morphology of incompatible blends and poor tensile properties while their reactive counterparts, OPS-CPE blends, have fine grain microstructure and show improved tensile strength throughout the range and improved elongation in the PE-rich blends. Relatively low concentrations of the reactive pair, oxazoline and carboxylic acid, are shown to be necessary to produce improved compatibility. The preblended graft copolymer OPS-g-CPE imparts compatibility to PS–PE blends also but not as effectively. This suggests that the addition of OPS and CPE during melt mixing of PS and PE forms OPS-g-CPE polymer at the interface and that these ingredients act as “in situ reactive compatibilizers” which improve physical properties.     

固相氯化法与水相悬浮法制备CPE可行性比较

本文对固相氯化法（下简称固相法）与水相悬浮法（下简称水相法）制备ＣＰＥ的工艺、产品性能、设备的使用情况等方面进行比较。比较结果表明，固相法工艺简单，设备投资省、使用寿命大幅度提高，无三废、见效快，所得ＣＰＥ性能与水相法相当，是一种简单、经济、有效的制备ＣＰＥ的方法。