工程塑料应用
工程塑料應用
공정소료응용
ENGINEERING PLASTICS APPLICATION
2014年
1期
44-50
,共7页
聚苯乙烯%PS/PE共混体系%PS/nano-CaCO3复合体系%超临界CO2%发泡
聚苯乙烯%PS/PE共混體繫%PS/nano-CaCO3複閤體繫%超臨界CO2%髮泡
취분을희%PS/PE공혼체계%PS/nano-CaCO3복합체계%초림계CO2%발포
polystyrene%PS/PE blend system%PS/nano-CaCO3 composite system%supercritical CO2%foaming
以聚苯乙烯(PS)，PS/聚乙烯(PS/PE)共混体系和PS/纳米CaCO3(PS/nano-CaCO3)复合体系为研究对象，以超临界CO2为发泡剂，选择典型工艺条件开展了发泡实验，采用扫描电子显微镜(SEM)观察泡孔结构，比较分析了不同工艺条件下的发泡行为，为利用PS，PS/PE共混体系和PS/nano-CaCO3复合体系提供研究基础。研究结果表明，PS具有较好的成孔性能，在发泡压力为22 MPa、发泡温度为80℃和饱和时间为2 h时，可制得泡孔孔径为(11.19±2.12)μm、泡孔密度为5.31×107个/cm3、发泡倍率2.64的微孔发泡材料。与PS相比，在相同工艺条件下，当添加PE的质量分数为10%时，PS/PE共混体系的泡孔孔径显著减小，泡孔密度有所提高，可通过调节工艺条件调整泡孔形貌；添加质量分数为5%经硅烷偶联剂表面改性的nano-CaCO3，可促进PS/nano-CaCO3复合体系的泡孔成核，改善其泡孔形态，增加泡孔密度，减小泡孔孔径。
以聚苯乙烯(PS)，PS/聚乙烯(PS/PE)共混體繫和PS/納米CaCO3(PS/nano-CaCO3)複閤體繫為研究對象，以超臨界CO2為髮泡劑，選擇典型工藝條件開展瞭髮泡實驗，採用掃描電子顯微鏡(SEM)觀察泡孔結構，比較分析瞭不同工藝條件下的髮泡行為，為利用PS，PS/PE共混體繫和PS/nano-CaCO3複閤體繫提供研究基礎。研究結果錶明，PS具有較好的成孔性能，在髮泡壓力為22 MPa、髮泡溫度為80℃和飽和時間為2 h時，可製得泡孔孔徑為(11.19±2.12)μm、泡孔密度為5.31×107箇/cm3、髮泡倍率2.64的微孔髮泡材料。與PS相比，在相同工藝條件下，噹添加PE的質量分數為10%時，PS/PE共混體繫的泡孔孔徑顯著減小，泡孔密度有所提高，可通過調節工藝條件調整泡孔形貌；添加質量分數為5%經硅烷偶聯劑錶麵改性的nano-CaCO3，可促進PS/nano-CaCO3複閤體繫的泡孔成覈，改善其泡孔形態，增加泡孔密度，減小泡孔孔徑。
이취분을희(PS)，PS/취을희(PS/PE)공혼체계화PS/납미CaCO3(PS/nano-CaCO3)복합체계위연구대상，이초림계CO2위발포제，선택전형공예조건개전료발포실험，채용소묘전자현미경(SEM)관찰포공결구，비교분석료불동공예조건하적발포행위，위이용PS，PS/PE공혼체계화PS/nano-CaCO3복합체계제공연구기출。연구결과표명，PS구유교호적성공성능，재발포압력위22 MPa、발포온도위80℃화포화시간위2 h시，가제득포공공경위(11.19±2.12)μm、포공밀도위5.31×107개/cm3、발포배솔2.64적미공발포재료。여PS상비，재상동공예조건하，당첨가PE적질량분수위10%시，PS/PE공혼체계적포공공경현저감소，포공밀도유소제고，가통과조절공예조건조정포공형모；첨가질량분수위5%경규완우련제표면개성적nano-CaCO3，가촉진PS/nano-CaCO3복합체계적포공성핵，개선기포공형태，증가포공밀도，감소포공공경。
Foaming of polystyrene(PS),PS/polyethylene(PE) blend systems and PS/nano-CaCO3 composite systems by using supercritical CO2 as foaming agent at different foaming conditions were studied. The microcellular structure was observed by scanning electron microscopy. The foaming behaviors of them were compared. It can provide research basis for preparing PS,PS/PE blend systems and PS/nano-CaCO3 composite systems microcellular materials. Results show that PS has good foamability. When saturation pressure is 22 MPa,forming temperature is 80℃and saturation time is 2 h,the cell diameter,the cell density and volume expansion ratio of microcellular PS is (11.19± 2.12) μm,5.31×107 cells/cm3 and 2.64 respectively. Compared with PS,PS/PE blend systems show better foamability with much smaller cell diameter and higher cell density at same foaming conditions when mass fraction of PE is 10%. The cell characteristics of foamed PS/PE blend systems could be tailored by altering the processing conditions. When mass fraction of surface modified nano-CaCO3 by silane coupling agent is 5%,pore nucleation is promoted and the pore morphology is improved,the cell size is decreased and cell density is increased in PS/nano-CaCO3 composite systems.
