软质聚氯乙烯材料配方气味改善研究

PVC材料的气味来源主要在于原料,本文从配方的PVC树脂聚合度、热稳定剂、增塑剂、填料、抗氧剂、除味剂等各个方面,对软质PVC材料的配方进行气味改善研究,总结软质PVC材料配方气味改善规律。结果表明,PVC材料的最终气味等级与原料的气味等级成正比;在具体选择上,应该选择聚合度较低的PVC树脂粉、钙锌类热稳定剂、DINP或DOTP等增塑剂等;此外,合理使用抗氧剂和除味剂,可以帮助得到最低气味配方组合。     

PVC透明软管的配方及生产工艺

选用折光率与PVC树脂相近的原料加工PVC透明软管,介绍了管的生产配方：PVC树脂（PVC－SG4或PVC－SG5）100份、增塑剂40－55份、热稳定剂1.5－3.5份、润滑剂0.1-1.0份及消色剂适量,针对透明度的要求,列举了具体配方实例,阐述了生产工艺流程及工艺条件的控制,并对生产过程中的异常现象进行了分析、解决。     

钙锌复合稳定剂在70℃绝缘级环保型软PVC塑料上的应用

简述了PVC树脂、软PVC塑料、钙锌复合稳定剂与PVC电缆料的特点,通过试验选择了PVC树脂与钙锌复合稳定剂型号,确定了优化配方,检测了粒料性能,申报了发明专利并获授权。结果表明:选用适宜型号的钙锌复合稳定剂能生产出符合ROHS与J-70要求的软PVC塑料     

亚磷酸酯对聚氯乙烯的稳定作用

聚氯乙烯(PVC)树脂在加工应用过程中常常要添加稳定剂、润滑剂、增塑剂及各种充填料等。这些添加剂是成型工艺的需要或制品性能的要求。PVC树脂在加工过程中受到热、光、氧作用会变色,甚至分解,合理设计配方很重要。加入少量亚磷酸酯将大大提高稳定效果。1 亚磷酸酯在PVC及其共聚物中的稳定机理亚磷酸酯可用作各种PVC配方的稳定剂是由于其中磷原子有未共用电子对和未     

提高PVC树脂热稳定性的研究

通过采用缓冲剂对聚合体系的pH值进行控制、在聚合配方中添加热稳定剂、控制聚合转化率等措施提高了PVC树脂的热稳定性能。结果表明：聚合开始添加用量为0．14％(或0．12％)(以VCM质量分数计)的碳酸氢铵pH值缓冲剂与聚合1．5h后流加用量为0．13％的氢氧化钠能有效地控制聚合体系pH值呈中性状态;采用加料方式2添加0．06％的PVC树脂改进剂或添加0．04％液体锌热稳定剂(或0．04％液体锌与新型耐热终止剂SPJ-KHZ复合使用)能有效提高PVC树脂的热稳定性能。     

用高聚合度PVC树脂研制耐热120℃等级PVC电缆料

用聚合度为2500的P-2500型PVC树脂作主要原料,辅之耐高温增塑剂、高效热稳定剂及防老化体系,经过系列配方试验,可达到耐热120℃等级绝缘料的要求。     

第6届全国PVC塑料与树脂技术年会会议通知

由全田聚氯乙烯信息站、《聚氯乙烯》编辑部举办的“第6届全国PVC塑料与树脂技术年会”定于2007年9月17日至19日在广东省肇庆市湖滨大酒店召开。本次会议邀请了国内PVC塑料加工行业的专家分析PVC塑料加工行业的新形势，介绍新技术、新材料、新产品；同时诚挚地邀请PVC树脂生产企业的技术人员参会，与PVC塑料加工企业的技术人员共同探讨、解决生产中出现的技术难题。此次会议特别邀请了重庆顾地塑胶电器有限公司的赵劲松专家作报告，报告题目为《聚氯乙烯热稳定剂配方设计》和《塑竹门窗的开发与研究》。在《聚氯乙烯热稳定剂配方设》…     

钙锌稳定剂在RoHS型90℃绝缘级软PVC塑料上的应用

简述了PVC电缆料与钙锌稳定剂的特点,通过试验选择了PVC树脂、增塑剂体系与钙锌稳定剂,确定了生产配方,检测了粒料性能。结果表明:选用钙锌稳定剂YC131E能生产出符合Ro HS与J-90要求的软PVC塑料。     

高压管PVC护套耐磨性的改进

考察了PVC树脂聚合度、耐磨剂对高压管PVC护套耐磨性的影响,得出的优化配方为:聚合度1 300的PVC树脂,100份;增塑剂,48份;稳定剂,1份;润滑剂,适量;炭黑,0.2份;助剂A,1.6份。     

硬质PVC发泡制品的配方设计

阐述了硬质PVC发泡制品配方中PVC树脂和热稳定剂、发泡剂、优泡剂、冲击改性剂、加工改性剂、填充剂、润滑剂及成核剂等助剂的选用原则,介绍了生产优质硬质PVC发泡制品的基础配方。     

甘油锌用作PVC热稳定剂的研究

运用刚果红试纸法、热烘箱老化实验法和流变仪试验,以硬脂酸锌作对比,对甘油锌配合物(简称甘油锌)用作聚氯乙烯(PVC)热稳定剂的热稳定作用进行了研究,并对甘油锌的复配进行了研究;还研究了稳定剂对 PVC 耐候性的影响。结果表明,甘油锌与硬脂酸钙在质量比为1.0/1.5时具有较好的协同作用,甘油锌/硬脂酸钙与环氧大豆油和亚磷酸三苯酯质量比为1.0/1.5/0.2/0.2时有较好的协同效应;所研究的甘油锌/硬脂酸钙复合热稳定剂对PVC 具有较好的热稳定作用,PVC 与复合热稳定剂质量比为100.0/2.9时,PVC 的刚果红试验热稳定时间达25 min、热烘老化试验热稳定时间达130 min。另外,研究发现环氧大豆油和亚磷酸三苯酯对硬脂酸锌/硬脂酸钙复合热稳定剂也有较好的协同效应。     

Development of a PVC Waterproofing Sheet

Stabilizer and plasticizer systems were studied for a PVC waterproofing sheet formulation to be processed by calendering. Combinations of stabilizer-lubricant systems that contained (Ba, Cd, Zn), dibasic lead phosphite, epoxidized soybean oil, barium stearate, calcium stearate, and stearic acid were evaluated. Oven aging tests showed that the system that contained 2 phr (Ba, Cd, Zn) stabilizer, 0.5 phr barium stearate, 5 phr epoxidized soybean oil, and 0.25 phr stearic acid was satisfactory. Combinations of diisodecylphthalate (DIIP), tricresyl phosphate (TCP), polybutylene adipate (PBA), and NBR were evaluated as the plasticizer system. Tensile properties in the machine and the transverse directions, cold flex temperature, loss of volatile matter content, and aging properties were studied as functions of the DIIP and PBA contents. A plasticizer system of 35 phr DIIP and 18 phr PBA was found to be satisfactory. The final formulation was processed at industrial scale and the product was characterized for its tensile properties, cold flex temperature, tear resistance, weldability, permeability to water, shrinkage, and its resistance to heat, light, acid, and water.     

熔融挤出制备PVC-g-MAH接枝物的研究

采用同向平行双螺杆挤出机熔融挤出制备了聚氯乙烯接枝马来酸酐(PVC-g-MAH)共聚物,通过正交实验考察了单体马来酸酐(MAH)用量、引发剂过氧化二异丙苯(DCP)用量、稳定剂用量以及氧化镁(MgO)用量对接枝率的影响,同时对聚合物的力学性能和耐热性进行了测试分析。傅里叶变换红外光谱(FTIR)分析表明MAH成功接枝到PVC上;四种因素对接枝率的影响主次顺序是:MgO>稳定剂>MAH>DCP;熔融接枝聚合反应的最佳配方为:MAH用量为7.5 phr、DCP用量为0.2phr、稳定剂用量为4.0 phr、M gO用量为7 phr;PVC-g-M AH共聚物的弯曲强度和冲击强度得到提升;维卡软化温度、热失重(TG)和差示扫描量热仪(DSC)分析表明PVC-g-MAH接枝物的热稳定性优于PVC。     

氰尿酸钙/锌的制备及其在PVC制品中的应用

以氰尿酸、氢氧化钙和氧化锌为原料,去离子水为溶剂,分别合成了聚氯乙烯(PVC)用热稳定剂氰尿酸钙、氰尿酸锌。采用元素分析仪(EA)、傅里叶变换红外光谱仪(FTIR)、热失重分析仪(TG)以及扫描电镜(FESEM)对氰尿酸钙/锌进行了表征分析。通过烘箱热老化和刚果红测试考察了氰尿酸钙/锌对PVC制品热稳定性能的影响,并对热稳定机理进行了探究。结果表明,单独加入PVC质量1%的氰尿酸钙或氰尿酸锌,PVC制品的热稳定性要优于加入等量的硬脂酸钙或硬脂酸锌;氰尿酸钙/锌复配后表现出良好的协调作用,氰尿酸钙/锌最佳质量比为3∶1,热稳定时间达28 min,PVC试片在70 min完全锌烧;并且,环氧大豆油(ESBO)是一种非常适合氰尿酸钙/锌体系的辅助稳定剂,能够进一步提高PVC体系的热稳定性能。     

Influence of nano‐CeO2 as Co‐stabilizer on the thermal stabilization efficiency of novel calcium/Zinc soap stabilizers for poly(vinyl chloride)

The novel organic calcium (Ca)/zinc (Zn) stabilizer of poly(vinyl chloride) (PVC) was synthesized from poly (zinc methylacrylate) and Ca adipate. The influences of Zn/Ca soap weight ratios and nano‐CeO₂ as co‐stabilizer on the thermal stability of PVC were investigated. Congo red testing, thermogravimetric analysis, dynamic rheology, and dynamic mechanical analysis of the mixtures were performed. The results show that the novel stabilizer has good stabilization efficiency on PVC. When 5 phr (parts by weight per hundred parts of resin) of novel stabilizer (weight ratio of Zn/Ca soap is 6/4) in 100 phr of PVC is used as stabilizer, the Congo red time can reach 192 min, which is 131 min longer than 5 phr of the mixture of 3 phr of Zn stearate and 2 phr of Ca stearate as stabilizer. If 3 phr of mixture of Zn methylacrylate with Ca adipate (weight ratio of Zn/Ca soap is 4/6) and 2 phr of nano‐CeO₂ are used as co‐stabilizers, the Congo red time is 205 min. The combination of nano‐CeO₂ with Ca/Zn soap stabilizer shows an obvious improvement for the thermal stability of the PVC. J. VINYL ADDIT. TECHNOL., 20:243–249, 2014. © 2014 Society of Plastics Engineers     

环氧大豆油对软PVC性能影响的研究

研究了环氧大豆油对软聚氯乙烯(PVC)性能的影响。实验表明,铅盐和有机锡的热稳定性较好,单独使用硬脂酸钙、硬脂酸锌、环氧大豆油或不足量的有机锡热稳定剂时,PVC样品很快变色。环氧大豆油与硬脂酸钙、硬脂酸锌、有机锡热稳定剂并用时,环氧大豆油具有很好的协同效应;但环氧大豆油和硬脂酸钙、硬脂酸锌不能简单替代有机锡稳定剂。热重分析证明了不同热稳定剂的效果。作为辅助增塑剂,环氧大豆油用量应低于5份。     

Effect of epoxy resin on thermal,dynamic, and mechanical properties of rigid poly(vinyl chloride)

This work is concerned with the effect of an epoxy resin on the properties of rigid poly(vinyl chloride) (PVC). The epoxy resin concentrations of 0, 1, 2, 4, and 6 phr were used to prepare PVC/epoxy polymer blends and the viscoelastic behavior of the blends was investigated by dynamic mechanical thermal analysis and rheometry test. The results revealed that the low molecular weight epoxy resin did not greatly affect the viscoelastic properties of PVC. From the morphological point of view, the smallest droplet size of epoxy dispersed in the polymer blends was found in the sample with 1 phr epoxy resin, and the largest one was for the sample with 6 phr epoxy. The thermal properties of PVC/epoxy blends were investigated using differential scanning calorimetry and thermogravimetric analysis, as well. According to our research, the initial decomposition temperature of PVC was increased about 6°C by the incorporation of epoxy resin. The results of tensile test showed that the addition of epoxy resin decreased the elongation‐at‐break of PVC about 50% in the samples without calcium carbonate and about 25% in the samples containing calcium carbonate. Moreover, the failure mode of PVC was changed from a ductile fracture mode to a brittle fracture mode with the addition of epoxy resin. J. VINYL ADDIT. TECHNOL., 25:E72–E79, 2019. © 2018 Society of Plastics Engineers     

90℃环保PVC护套料的研制

通过研究基础树脂、复合稳定剂、增塑剂、填充剂等对电线电缆用环保聚氯乙烯(PVC)护套料性能的影响,确定了电线电缆用环保PVC护套料配方:PVC为100.0 phr,Ca/Zn复合稳定剂为8.0 phr,邻苯二甲酸二异癸酯为40.0 phr,对苯二甲酸二辛酯为10.0 phr,重质CaCO3为35.0 phr.对产物性能的表征表明,整个配方体系不含对人和环境有害的Pb、Cd、Hg、Cr6 等重金属及多溴联苯及其醚类,护套料性能完全满足90℃环保PVC护套料的标准性能要求,挤出工艺性能优良.     

Preparation and performance of PVC long-term heat stabilizer based on the synergistic effect of uracil and metal complexes

In order to improve the deficiency of traditional polyvinyl chloride (PVC) heat stabilizer, triazole-based zinc-containing complex (abbreviated as [Zn(ttr)(OAc)]) with good compatibility with PVC and a strong ability to absorb HCl was prepared in this paper, which was characterized by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscope (SEM) and thermogravimetric analysis (TGA). PVC sheets were prepared by mixing PVC with composite heat stabilizer (DAJ) composed of [Zn(ttr)(OAc)] and 1,3-dimethyl-6-aminouracil (DAU). Different kinds and amounts of common auxiliary heat stabilizers were selected and added to the DAJ system to study the effect of thermally stable system on PVC by Congo red test, Discoloration test, Dynamic thermal stability test, SEM, TGA and Transmittance test and the relevant mechanism was explored. The PVC sheets with DAJ blended by 1.2 phr DAU and 0.8 phr [Zn(ttr)(OAc)] showed relatively excellent coloring properties, long-term thermal stability, and high light transmittance. Compared with dibenzoylmethane (DBM), 0.5 phr sorbitol and 1.5 phr epoxy soybean oil (ESBO)/Antioxidant 168 showed good synergistic effect with DAJ. Due to the polyhydroxy nature of sorbitol, the thermal stability of PVC was significantly improved, and the transmittance of PVC benefited from the similar miscibility of ESBO long chain. This was also confirmed by TGA and SEM of PVC sheet.     

环氧化菜籽油基PVC增塑剂的制备与性能研究

先将菜籽油用苯甲醇醇解,然后再将所得的苯甲醇酯环氧化,制得环氧菜籽油脂肪酸卞酯增塑剂。研究了该增塑剂对聚氯乙烯(PVC)玻璃化转变温度、热稳定性和力学性能的影响。结果表明:每100份PVC树脂加入80份环氧菜籽油脂肪酸卞酯后,PVC树脂的玻璃化转变温度从80℃下降到-28℃,5%热失重温度由240.1℃提升到272.8℃,10%热失重温度由259.9℃提高到288.4℃;分别用环氧菜籽油脂肪酸苄酯和DOP增塑的PVC树脂在常温下显示出相似的力学性能和耐迁移性能。