化工进展
化工進展
화공진전
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2010年
1期
67-70,75
,共5页
聚碳酸酯%熔融酯交换%有机胺
聚碳痠酯%鎔融酯交換%有機胺
취탄산지%용융지교환%유궤알
polycarbonate%melt transesterification%organic amine
研究了以碳酸二苯酯(DPC)和双酚A(BPA)为原料,氢氧化四乙基铵(TEAH)为催化剂,熔融酯交换合成聚碳酸酯的工艺.其催化剂用量、原料配比,反应时间等工艺条件对产物分子量等参数有较大的影响.与以氢氧化钠作催化剂相比,在所得的较优条件下以TEAH为催化剂,可得到分子量较高、分子量分散指数低、熔体流动性好、支化重排产物少、基本无色的聚碳酸酯树脂.
研究瞭以碳痠二苯酯(DPC)和雙酚A(BPA)為原料,氫氧化四乙基銨(TEAH)為催化劑,鎔融酯交換閤成聚碳痠酯的工藝.其催化劑用量、原料配比,反應時間等工藝條件對產物分子量等參數有較大的影響.與以氫氧化鈉作催化劑相比,在所得的較優條件下以TEAH為催化劑,可得到分子量較高、分子量分散指數低、鎔體流動性好、支化重排產物少、基本無色的聚碳痠酯樹脂.
연구료이탄산이분지(DPC)화쌍분A(BPA)위원료,경양화사을기안(TEAH)위최화제,용융지교환합성취탄산지적공예.기최화제용량、원료배비,반응시간등공예조건대산물분자량등삼수유교대적영향.여이경양화납작최화제상비,재소득적교우조건하이TEAH위최화제,가득도분자량교고、분자량분산지수저、용체류동성호、지화중배산물소、기본무색적취탄산지수지.
The synthesis of polycarbonate (PC) by melt transesterification from diphenol carbonate (DPC) with 4,4'-dihydroxy-diphenyl-2,2-propane (BPA) using tetraethyl ammonium hydroxide (TEAH) as catalyst was experimentally studied. The properties of the resulting polymer was influenced markedly by the operating conditions including the concentration of catalyst, the ratio of DPC/BPA and reaction times in different processing stages. Compared with NaOH, using TEAH as catalyst under the optimized process conditions, an almost colorless PC was obtained with relatively higher molecular weight, narrower molecular weight distribution and less branching and rearranging side-products.
