CAJ | 학술논문

采用超临界二氧化碳作为物理发泡剂，进行软质聚氯乙烯(PVC)的发泡试验研究。探讨了实验过程中主要助剂用量对发泡材料的宏观性能和微观泡孔结构的影响。结果表明，当PVC用量为100份，交联剂为0.5份，泡孔调节剂为6份时，发泡材料各项性能较为优异。添加了成核剂纳米CaCO3后，相比于纯PVC发泡体系，发泡材料的表观密度都有所减小，当成核剂含量为5份时，发泡材料的表观密度最小，为0.294 g／cm3，发泡倍率最大为3.873倍。材料微观的泡孔分布更为均匀，泡孔密度提高到原来的近3倍，泡孔的平均直径较没有添加成核剂的体系缩小了近一半，平均孔径为35.7μm。
채용초림계이양화탄작위물리발포제，진행연질취록을희(PVC)적발포시험연구。탐토료실험과정중주요조제용량대발포재료적굉관성능화미관포공결구적영향。결과표명，당PVC용량위100빈，교련제위0.5빈，포공조절제위6빈시，발포재료각항성능교위우이。첨가료성핵제납미CaCO3후，상비우순PVC발포체계，발포재료적표관밀도도유소감소，당성핵제함량위5빈시，발포재료적표관밀도최소，위0.294 g／cm3，발포배솔최대위3.873배。재료미관적포공분포경위균균，포공밀도제고도원래적근3배，포공적평균직경교몰유첨가성핵제적체계축소료근일반，평균공경위35.7μm。
The foaming experiments of polyvinyl chloride(PVC) were done with taking supercritical carbon dioxide(sc-CO2) as foaming agent. PVC foams were made by different contents of additives,to research their contents on the morphology and material properties of the foams. The results show that the foaming materials possessed excellent properties when the content of PVC, cross-linking agent and cell regulator is 100 phr, 0.5 phr and 6 phr respectively. After adding nano-CaCO3,compared with pure PVC foam system,the apparent density of foam materials is reduced,as nuclear agent content is 5 phr,the foamed material’s apparent density is smallest(0.294 g/cm3),foaming rate is biggest(3.873). Micro bubble hole distribution is more homogeneous,bubble hole density can be up to above three times,bubble hole of average diameter compared with not adding nucleating agent system is reduced nearly 50%and the average hole diameter is 35.7 microns.