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什么是PVC聚氯乙烯？

相關標簽：比利時索爾維 PVC、法國SIDIAC PVC、寧波臺塑 PVC塑膠顆粒、光學性能 PVC、專用粒料 PVC、良好的抗熱震性 PVC塑膠顆粒

什么是PVC聚氯乙烯？
PVC是最早工業化生產的塑料品種之一，也是乙烯基聚合物中最重要的一類，其產量僅次于PE，為第二大類塑料品種，在工業上生產PVC的方法有四種：懸浮聚合、乳液聚合、本體聚合和溶液聚合。其中以懸浮聚合的PVC質量好、成本低，是目前生產PVC的最主要方法。
(1)PVC的常用特性
PVC為白色粉狀顆粒，密度為1.351.45g/cm3,由于在結構中含有較高的氯，故具有耐燃自熄的特性；PVC的大分子鏈含有極性的氯原子，分子間的作用力比PE大，故強度和硬度都比PE稍大；PVC的相對分子量為310萬，呈線性無定形結構。它的分子量對加工和塑件性能有很大影響，分子量越大，加工時就要用更高的壓力和溫度，才能使熔料的流動性達到加工要求，使得加工難度變大，但制品的機械強度得以提高。
PVC的熱穩定性和耐光性較差，軟化溫度接近于分解溫度，因此在加工時要加人各種穩定劑和增塑劑。PVC在70-80℃時軟化，℃時呈熔融態，190℃以上分解并放出有毒的氣化氫。由于增塑劑加人的量不同，可制得硬質PVC和軟質PVC.PVC的電絕緣性能良好，有較好的消振性，成本低廉。但是，PVC的熱穩定性差，受熱會引起不同程度的分解，而軟質PVC制品中的增塑劑還有外遷之弊，它對應變較敏感，變形后不能完全復原，且在低溫時會變硬。
(2)PVC的主要用途
PVC被廣泛用于腐蝕性強的化工設備中，或制成各種耐化學藥品的容器、管道，用在貯存和輸送腐蝕性的氣體、液體中。硬PVC中加入合適的穩定劑和選用恰當的制作工藝，可制作耐候性良好的下水道水管，防火或阻火的窗框及裝飾材料。軟PVC制造出的人造革，有很好的耐蝕性和耐折性，可以制作沙發、箱子、旅行袋、旅行包、椅子。軟PVC還可制作軟管、薄膜、日用品、電線絕緣包皮等。 。以上文獻若需轉載請備注出處：PBT樹脂 //shanglikaiguan.cn/

延伸閱讀—PVC 南通吉匯 S-101應用案列
其它 醫用,食品 其它 澄明無色
參考數據
性能項目 試驗條件[狀態] 測試方法 測試數據
拉伸強度 MT｜≥13.0 MPa
拉伸強度 MD｜≥13.0 MPa
拉伸強度 檢驗結果｜12 MPa
邵氏硬度 MT｜≤80
邵氏硬度 MD｜>80
邵氏硬度 檢驗結果｜52
斷裂伸長率 MT｜≥250 %
斷裂伸長率 MD｜≥250 %
斷裂伸長率 檢驗結果｜400 %
180℃熱穩定時間 MT｜≥40 min
180℃熱穩定時間 MD｜≥40 min
180℃熱穩定時間 檢驗結果｜60 min
灰分 MT｜≤1 mg/g
灰分 MD｜≤1 mg/g
灰分 檢驗結果｜0.5 mg/g
溶血 MT｜溶血率≤5%
溶血 MD｜溶血率≤5%
溶血 檢驗結果｜合格
過敏 MT｜過敏率不大于2級,過敏率不大于28%
過敏 MD｜過敏率不大于2級,過敏率不大于28%
過敏 檢驗結果｜合格
酸堿度 MT｜≤1.0 PH
酸堿度 MD｜≤1.0 PH
酸堿度 檢驗結果｜0.6 PH
鋅 MT｜≤0.4 u/ml
鋅 MD｜≤0.4 u/ml
鋅 檢驗結果｜0.3 u/ml
熱原 MT｜無致熱原
熱原 MD｜無致熱原
熱原 檢驗結果｜合格
還原物質 MT｜≤0.3
還原物質 MD｜≤0.3
還原物質 檢驗結果｜0.2
重金屬 MT｜≤0.3 ug/ml
重金屬 MD｜≤0.3 ug/ml
重金屬 檢驗結果｜0.2 ug/ml
紫外線吸收 230-360mm MT｜≤0.3
紫外線吸收 230-360mm MD｜≤0.3
紫外線吸收 230-360mm 檢驗結果｜0.2
急性全身毒性 MT｜不產生急性全身毒性
急性全身毒性 MD｜不產生急性全身毒性
急性全身毒性 檢驗結果｜合格
聚乙烯單體 MT｜≤1 ug/g
聚乙烯單體 MD｜≤1 ug/g
聚乙烯單體 檢驗結果｜0.5 ug/g
不揮發物 MT｜≤2.0 mg/100l
不揮發物 MD｜≤2.0 mg/100l
不揮發物 檢驗結果｜0.8 mg/100l
色澤 MT｜澄明無色
色澤 MD｜澄明無色
色澤 檢驗結果｜合格
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