氯化聚氯乙烯合金的制备

利用ACR、CPE和EVA作为加工助剂和抗冲改性剂与CPVC共混。对合金的性能作了测试。并对CPVC加工用的配方和工艺条件进行了探讨。结果表明：ACR(最佳用量为5份)能够改善CPVC的加工性能；CPE(最佳用量为9份)和EVA(最佳用量为5份)能提高合金的韧性。     

CPVC对PVC性能的影响

研究了在PVC中添加不同量的CPVC共混体系的加工性能、耐热性能、力学性能。实验结果表明:随着CPVC含量的增加,共混体系的加工性能变的较为困难,但拉伸强度和维卡软化点温度有明显提高,缺口冲击强度和断裂伸长率有所下降。当CPVC用量为20份时,是实际生产及实际应用的一个较为理想的比例。     

ACR改性CPVC凝胶化测试及力学性能的研究

采用差示扫描量热法(DSC)和HAAKE流变仪研究了不同用量的抗冲型丙烯酸酯橡胶(ACR)改性氯化聚氯乙烯(CPVC)的凝胶化性能及流变性能,综合力学件能、耐热性能、微观形貌对ACR改性CPVC进行系统研究.结果表明,ACR的加入能极大地提高CPVC的凝胶化度,促进塑化,改善CPVC加工性能,ACR用量6～9份为宜,对CPVC的增韧效果较好.     

MBS对CPVC凝胶化的影响及CPVC/MBS共混物性能的研究

采用差示扫描量热仪和HAAKE流变仪研究了甲基丙烯酸甲酯-丁二烯-苯乙烯共聚物(MBS)对氯化聚氯乙烯（CPVC）凝胶化性能及流变性能的影响,并对CPVC/MBS共混物的力学性能、耐热性能、微观形貌进行了系统研究。结果表明,MBS能改善CPVC的加工性能。随着MBS含量的增加,共混物的凝胶化度得到极大的提高,塑化时间明显缩短,平衡扭矩不断上升,平衡温度大幅上升。MBS用量为6份时,CPVC/MBS共混物的综合性能最佳。     

高性能CPVC填料共混料的研制

试验通过在CPVC树脂中添加有机锡热稳定剂、环氧大豆油、PE蜡等加工助剂,制备了各项性能指标优异的高性能CPVC填料共混料,探讨了原料PVC聚合度、CPVC树脂氯含量和环氧大豆油用量对共混料物理性能和加工性能的影响。     

润滑剂对ABS树脂性能的影响

采用HAAKE-9000型扭矩流变仪,在一定转速和温度下,测定了添加不同润滑剂时ABS体系的塑性形变曲线,对各种曲线进行分析,并研究了润滑剂的种类和用量对ABS力学性能和热性能的影响。结果表明：选熔融流动助剂1为ABS的加工助剂较理想,适宜用量为1.0～1.5份。     

CPVC增韧改性的研究

研究了苯乙烯-丁二烯-丙烯腈共聚物（ABS）、甲基丙烯酸甲酯-丁二烯-丙烯腈共聚物（MBS）、氯化聚乙烯（CPE）、聚氯乙烯和邻苯二甲酸二辛酯增韧氯化聚氯乙烯（CPVC）的冲击性能。结果表明，MBS、CPE和ABS能有效提高CPVC的冲击强度，其中MBS对CPVC体系增韧效果最为明显，添加10份（质量份数）MBS的CPVC的冲击强度较未添加增韧剂的提高了48.8%。增韧剂的加入使体系的拉伸强度、维卡软化点均有不同程度的下降，其中MBS维卡软化点降低得最少,为118.7 ℃,较未添加增韧剂的CPVC体系只降低了1.9 ℃。增韧剂的加入对CPVC体系的加工性能有影响。添加MBS后加工性能较好，优于其他增韧剂。当加入10份MBS的时候，材料的综合性能较好。     

新型加工助剂DF在ACM胶料中的应用研究

研究了自制的新型加工助剂DF对聚丙烯酸酯橡胶（ACM）加工性能和物理性能的影响。并与常规加工助剂硬脂酸和进口加工助剂WB进行了对比分析。试验结果表明，加工助剂DF用量为1份即可有效地改善ACM胶料的加工性能，如防止混炼胶粘辊、降低门尼粘度和混炼功耗，同时ACM硫化胶仍可保持良好的力学性能、耐热空气和耐热油老化性能以及压缩永久变形性能，透镜电镜分析结果表明，加工助剂DF可以改善炭黑在ACM胶料中的分散性。动态粘弹谱分析结果表明，加入1份加工助剂DF的ACM硫化胶的玻璃化转变温度比无加工助剂的硫化胶降低7.2℃，可有效地提高ACM硫化胶的耐寒性。     

CPVC型材的配方设计及性能研究

考察了CPVC/PVC的共混比、稳定剂、润滑剂、加工改性剂和填料对CPVC型材密度、力学性能、加工性能和耐热性能的影响。试验得出的最佳配方为:CPVC,50份;PVC,50份;有机锡稳定剂,2份;硬脂酸钙,1.0～1.5份;58号精炼石蜡,1份;PA20,1～2份;活性轻质碳酸钙,20份。     

Mg(OH)_2对PVC加工流变性能和热稳定性能的影响

以钙-锌-水滑石复合热稳定剂或铅盐复合热稳定剂作为热稳定剂,加入丙烯酸酯共聚物(ACR)KM 310,ACR 401及聚乙烯(PE)蜡、硬脂酸等助剂,探讨阻燃助剂Mg(OH)2用量对PVC加工流变性能和热稳定性能的影响。固定热稳定剂及ACR KM 310,ACR 401,PE蜡和硬脂酸等助剂用量,随着Mg(OH)2用量的增加,PVC最小扭矩、最大扭矩及平衡扭矩增大,加工能耗增大,加工热稳定性能降低。当Mg(OH)2用量小于10份时,最大扭矩小于38.3 N·m,热稳定时间大于20 min;当Mg(OH)2用量大于20份时,最大扭矩大于40 N·m,热稳定时间小于14 min;以钙-锌-水滑石复合热稳定剂或铅盐复合热稳定剂作为热稳定助剂,Mg(OH)2用量不宜超过20份。     

CPVC/ABS/CPE三元共混体系的组成与性能关系研究

研究了氯化聚氯乙烯(CPVC)、丙烯腈-丁二烯-苯乙烯共聚物(ABS)和氯化聚乙烯(CPE)三元共混体系的组成与性能之间的关系。结果表明,ABS树脂可以有效降低CPVC/ABS/CPE三元共混体系的平衡扭矩,缩短三元共混体系的塑化时间,改善其流动性;当CPE含量固定、共混体系中CPVC与ABS的质量比为7:3时,共混体系的拉伸强度和缺口冲击强度达到最佳,共混体系具有较好的综合力学性能;随着CPE含量的增加,三元共混体系的缺口冲击强度显著提高,CPE对三元共混体系具有优良的增韧作用,用量以15份为宜。     

Blends of a chlorinated poly(vinyl chloride) compound and a thermotropic liquid crystalline copolyester: Mechanical properties of squeezed flow films

The mechanical properties of squeezed flow films were measured on blends of a chlorinated poly(vinyl chloride) (CPVC) compound and a thermotropic liquid crystalline copolyester of p-hydroxybenzoic acid/poly(ethylene terephthalate) (60/40), hereafter referred to as LCC. CPVC is immiscible with LCC. The most serious and unique problem of liquid crystalline polymers is their tendency to fibrillate when fabricated into films and injection molded parts, primarily because of a high degree of mechanical anisotropy. It has been found that the mechanical anisotropy of LCC and blends could be lessened using nonisothermal squeezing equibiaxial extension flow. The maximum tensile properties of LCC are achieved when processed in the vicinity of 260°C. For blends of CPVC containing LCC, the mechanical properties are dependent on the processing temperature and compositions. Blends with no more than 20 wt% of LCC exhibit significant increases in tensile properties. This is due to the possibility of frozen-in macroscopic biaxial orientation of LCC in the blends during the nonisothermal squeezing flow. Within the range of processable temperatures, the reinforcement of CPVC due to the incorporation of LCC can be achieved at a temperature below the optimum processing temperature of LCC, although the thermal history of blends never reaches that temperature.     

热稳定剂和润滑剂对氯化聚氯乙烯树脂性能的影响

本文重点研究了钙锌复合稳定剂和有机锡稳定剂及辅助稳定剂对氯化聚氯乙烯（CPVC）树脂的动态热稳定效果,确定合理的稳定体系及配比;研究了内外润滑剂对CPVC树脂加工流动性能的影响;此外还提出CPVC管材参考配方及相应的性能指标并与国外同类产品做对比。     

加工温度对氯化聚氯乙烯凝胶化度及力学性能的影响

采用差示扫描量热法测定了不同加工温度时氯化聚氯乙烯(CPVC)的凝胶化度,并对其凝胶化度与材料力学性能的关系进行了研究。结果表明,加工温度从170 ℃升高到180 ℃时,CPVC的凝胶化度由47.2 ％增至76.5 ％,当凝胶化度为61.9 %时,力学性能最优。     

Study of compatibility,morphology structure and mechanical properties of CPVC/ABS blends

Compatibility, morphology structure, and mechanical properties of CPVC/ABS (Chlorinated polyvinyl chloride/acrylonitrile‐butadiene‐styrene) blends were studied. The core‐shell ratios of ABS were set at 40/60 and 70/30. The interface interactions between ABS and CPVC were changed by modifying the acrylonitrile (AN) content of the shell. The compatibility of CPVC with the shell of ABS was studied by the blends of CPVC/SAN with different AN content in SAN. Dynamic mechanical analysis results of CPVC/SAN were in accordance with the morphological properties of CPVC/ABS. The mechanical properties of CPVC/ABS blends in which the polybutadiene content was set to 15 wt % were studied. Results showed, with the change of AN content, the impact strength followed different way for CPVC/ABS blends with different core‐shell ratios of ABS because of the influence of the compatibility. When the core‐shell ratio was 40/60, the CPVC/ABS blends were much ductile in more widely AN range than the blends, whereas the core‐shell ratio of ABS was 70/30. The differences also showed in the SEM micrographs by the investigation of toughening mechanism. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010     

Effects of postchlorination on key product and processing properties of PVC

The behavior of PVC resins has been shown to change dramatically when postchlorinated from 57 to 70 percent chlorine. Many of these changes are beneficial: heat resistance, thermoformability, and combustion properties are improved to an extent that opens new market opportunities for properly formulated chlorinated PVC (CPVC) materials. Sharply increasing melt viscosity also results from increasing chlorine content, creating the need for compounding and processing expertise differing from that for rigid PVC. The fact that such expertise has been developed, and is constantly being improved, is expanding the use of CPVC.     

CPVC工业管道系统在电镀工业中的应用

氯化聚氯乙烯是加工行业管道系统的理想选择。与其他材料比较,CPVC有其卓越的性能;优异的均衡性,耐蚀性、良好的机械性能及较高的性能价格比,CPVC管道系统包括管道、管件、阀门及板材。安装简单,只需用胶水粘接。CPVC可用于电镀、金属处理、纸浆、化学工业、工业废物处理和食品及饮料工业等。同时比较了CPVC与聚丙烯的性能和化学阻抗数据。