CPE和 ACR改性 UPVC管材的性能对比

对实际应用中CPE改性UPVC管材遇到的问题从改性机理上进行了探讨，并对CPE、ACR改性的UPVC管材性能进行了比较。     

CPE在改性UPVC抗冲性能中的应用与选择

本文从CPE改性UPVC抗冲改性原理及应用入手，阐述如何选择CPE抗冲改性剂。     

CPE树脂特性对UPVC管材质量的影响

介绍了CPE树脂含氯量、树脂平均粒径、残余结晶度以及合成CPE用的HDPE分子质量对UPVC管材质量的影响情况     

纳米CaCO_3粒子填充UPVC的性能与影响因素研究

研究了硬脂酸包覆的纳米CaCO3填充UPVC的力学性能与影响因素。研究结果表明,增加CaCO3的用量可提高UPVC的杨氏模量和缺口抗冲强度而屈服强度降低。与填充亚微米CaCO3不同,采用较低的塑炼温度有益于获得较高的材料韧性。在纳米CaCO3填充的UPVC中,使用少量的CPE型改性剂可获得超韧的UPVC。     

弱界面无机刚性粒子改性UPVC力学性能的研究

考察了硬脂酸包覆沉淀CaCO3的粒径、用量及塑炼温度对UPVC力学性能的影响。研究结果表明:减少CaCO3用量或CaCO3的粒径均有利于获得较高的屈服强度;增加CaCO3的用量或减少所用CaCO3的粒径均有利于UPVC弹性模量提高;适当增加亚微米或纳米CaCO3的用量可提高PVC的缺口冲击强度,亚微米CaCO3的最佳用量为15份,纳米CaCO3的最佳用量为40份。为了获得力学性能优化的UPVC,填充亚微米CaCO3的UPVC宜于较高温度加工,填充纳米CaCO3的UPVC宜于较低温度加工。在纳米CaCO3填充的UPVC中,仅用少量CPE即可得到超韧的UPVC材料。     

建筑用高抗冲低烟阻燃UPVC专用料的研制

采用CPVC、CPE与PVC共混抗冲改性,并通过添加Al(OH)3、Sb2O3、DBDPO三种复配阻燃剂,制得了建筑用高抗冲、低烟、阻燃UPVC专用料,并探讨了CPVC、CPE对PVC的共混抗冲击、耐热性能以及复配阻燃剂对体系的阻燃、消烟性能和力学性能的影响。     

高抗冲UPVC（PVC／CPE）天然气管线网在荷兰的使用介绍

荷兰在已住的18年中敷设了二万多公里的UPVC天然气管线网，自1966年起又有3200公罢的高抗冲PVC（PVC／CPE）天然气管线得到应用。管线的使用压力不超过0．2巴。     

PVC窗框异型材及专用料

据“European Plastics News 1996,23(9):44”报道:德国Kmmerling公司开发了用于窗框异型材生产的硬聚氯乙烯(UPVC)掺混料,产品商标为Kmalit Z,据称可以在-15～35℃温度下使用。Kmalit Z是氯化聚乙烯(CPE)改性硬聚氯乙烯掺混料,已被证明使用寿命可达28年,而在极端环境下的加速老化试验表明其寿命可超过60年。实验室测试还表明,在低达-40℃下     

无机刚性卡粒子增韧UPVC研究进展

概述了无机刚性粒子增韧改性UPVC的研究及发展的现状,阐述了无机刚性粒子增韧UPVC的机理及影响因素,总结目前国内增韧UPVC的无机刚性粒子的种类、方法、特点以及UPVC/无机刚性粒子复合材料的应用.     

无机刚性粒子增韧UPVC研究进展

概述了无机刚性粒子增韧改性UPVC的研究及发展的现状,阐述了无机刚性粒子增韧UPVC的机理及影响因素,总结目前国内增韧UPVC的无机刚性粒子的种类、方法、特点以及UPVC/无机刚性粒子复合材料的应用。     

Thermal,mechanical, and acoustic properties of silica‐aerogel/UPVC composites

The properties of silica‐aerogel/UPVC composites have been investigated with emphasis on sound and heat insulation. UPVC is a material of construction for window profiles and drainage pipes. Hydrophobic silica aerogels were synthesized using silicate sodium as a precursor through a two‐step sol–gel process. The physical and textural properties of the synthesized silica aerogels such as density, surface area, and particle size were analyzed using SEM and BET analysis. Then, the synthesized aerogels were mixed with Unplastisized Polyvinyl Chloride (UPVC) compound at five different weight ratios in an internal mixer to find out the effects of silica aerogels on the thermal, mechanical, and acoustical characteristics. The prepared UPVC/aerogel composites were characterized for tensile properties, impact strength, hardness, Vicat softening temperature, thermal conductivity, sound absorption, and sound transmission loss. The results revealed that adding silica aerogel in to the matrix of UPVC increases its hardness and softening temperature while decreases impact strength. The thermal conductivity of UPVC was decreased by up to 50% using silica aerogel. The sound absorption property of UPVC was increased up to three times by using silica aerogels due to its high porosity. Silica aerogel increased the maximum sound transmission loss of UPVC in the low frequency range. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134, 44685.     

UPVC门窗型材用复合稳定剂的对比研究

选择未增塑聚氯乙烯（UPVC）门窗型材市场上常用的铅盐复合稳定剂、稀土复合稳定剂和新近推出的钙锌复合稳定剂，在配方相同或相近的条件下，采用刚果红试验、吉尔加速热老化试验、转矩流变试验、耐候性试验比较加入不同复合稳定剂的未增塑聚氯乙烯材料的热稳定性、流变性和耐候性，反推其对应复合稳定剂的热稳定剂、内外润滑匹配和光稳定剂的差异。结果显示：传统的铅盐类复合稳定剂在UPVC材料的热稳定性上占优势，新推出的钙锌类复合稳定剂在UPVC材料的耐候性上占优势，而不同复合稳定剂的内外润滑匹配的差异性导致UPVC材料的流变行为不一致。     

UPVC/纳米CaCO_3复合型材的研究

分别研究了纳米CaCO3粉体与纳米CaCO3母料作为改性剂,对UPVC型材性能的影响。结果表明:填充8份纳米CaCO3粉体的UPVC型材拉伸强度与冲击强度都显著提高。纳米CaCO3母料填充体系力学性能要比粉体直接填充的低,但冲击强度在高填充时保持稳定,挤出扭矩较低,并初步推导了机理。     

Effects of carbon‐coated titanium dioxide nanoparticles as a photostabilizer on the photodegradation of rigid poly(vinyl chloride)

In this study, nanocomposites of rigid poly(vinyl chloride) (UPVC) using the synthesized carbon‐coated titanium dioxide (TiO₂) nanoparticles and commercial powder of titanium dioxide (with rutile structure) were prepared by melt blending. The presence of carbon‐coated TiO₂ nanoparticles with rutile structure in UPVC matrix led to an improvement in photo stability of UPVC nanocomposites in comparison with commercial UPVC. The photocatalytic degradation behavior of nanocomposites was investigated by measuring their structural changes, surface tension, and mechanical and morphological properties before and after UV exposure for 700 h. It was found that mechanical and physical properties of UPVC nanocomposites are not considerably reduced after UV exposure in the presence of carbon‐coated TiO₂ nanoparticles even in small percentage of nanoparticles in comparison with the presence of commercial TiO₂ particles. Therefore, it can be concluded that UPVC/TiO₂ nanocomposite with low content of carbon‐coated TiO₂ nanoparticles(0.25 wt %) illustrated high stability under light exposure. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40228.     

海泡石填充硬质聚氯乙烯的研究

探讨了海泡石的结构及海泡石对聚氯乙烯的补强机理，研究了国产海泡石填充硬质聚氯乙烯（UPVC）的性能。结果表明，在100份UPVC中添加10份海泡石可获得综合性能较好的复合材料，从而为开发利用海泡石提供了一条新途径。     

新型PVC粉料直接成型单螺杆挤出机及应用

从硬质聚氯乙烯(UPVC)型材、管材的特殊成型规律入手讨论了单螺杆挤出机在UPVC粉料直接成型时所面临的各种问题,提出了特殊设计的IKV系统、功能螺杆、可控的排气机筒、计量喂料、螺杆控温等五个有关UPVC干混粉料直接成型的关键。同时介绍了这种单螺杆挤出机在生产中的应用情况。     

稀土稳定剂在UPVC异型材中的应用

分析研究了稀土稳定剂在UPVC异型材生产中的应用。采用3种稳定体系(铅盐单体、复合铅盐稳定剂、稀土稳定剂)所作的对比实验结果表明，在UPVC异型材中使用稀土稳定剂，其产品性能明显优于铅盐稳定剂。     

影响硬质聚氯乙烯型材塑化质量的关键因素分析

在硬质聚氯乙烯(UPVC)型材的生产过程中,通过系列实验,对影响PVC塑化质量的关键因素如原材料、配方、混料工艺、挤出工艺及挤出系统等进行分析并提出了相应的控制措施,以提高UPVC型材的质量。