An epoxy-based precursor polymer was prepared from the diglycidyl ether of Bisphenol A and aniline.The precursor polymer was doped with a certain amount of cross-linking agent M20S to obtain a thermal-curable polymeri...An epoxy-based precursor polymer was prepared from the diglycidyl ether of Bisphenol A and aniline.The precursor polymer was doped with a certain amount of cross-linking agent M20S to obtain a thermal-curable polymeric system BPAN+M20S.The thermal curing behavior of BPAN+M20S was studied by means of in-situ infrared spectroscopy and it was found that BPAN+M20S showed significant thermal-curability and had the similar curing dynamics at both 120℃ and 180℃.The curing degree can reach 70 7% at 120℃ and 81 8% at 180℃ within 20 min,respectively.When a two-layer film was prepared with the cured polymer BPAN+M20S as the bottom cladding and an E.O.polymer BPAN-1A-NT as the upper layer,SEM studies showed a perfect interface between the bottom and the upper layers of the two-layer film and the surface of the upper layer was quite smooth.A polymeric planar prototype waveguide,which was fabricated based on the above two-layer film and covered by another layer of UV photoresist,showed good wave-guide performance.展开更多
Calcium carbonate,which is widely employed as a filler added into the polymer matrix,has large numbers of applications owing to the excellent properties such as low cost,non-toxicity,high natural reserves and biocompa...Calcium carbonate,which is widely employed as a filler added into the polymer matrix,has large numbers of applications owing to the excellent properties such as low cost,non-toxicity,high natural reserves and biocompatibility.Nevertheless,in order to obtain the good filling effect,calcium carbonate needs to be surface modified by organic molecules so as to enhance the dispersion and compatibility within the composites.This review paper systematically introduces the theory,methods,and applications progress of calcium carbonate with surface modification.Additionally,the key factors that affect the properties of the composites as well as the current difficulties and challenges are highlighted.The current research progress and potential application prospects of calcium carbonate in the fields of plastics,rubber,paper,medicine and environmental protection are discussed as well.Generally,this review can provide valuable reference for the modification and comprehensive utilization of calcium carbonate.展开更多
文摘An epoxy-based precursor polymer was prepared from the diglycidyl ether of Bisphenol A and aniline.The precursor polymer was doped with a certain amount of cross-linking agent M20S to obtain a thermal-curable polymeric system BPAN+M20S.The thermal curing behavior of BPAN+M20S was studied by means of in-situ infrared spectroscopy and it was found that BPAN+M20S showed significant thermal-curability and had the similar curing dynamics at both 120℃ and 180℃.The curing degree can reach 70 7% at 120℃ and 81 8% at 180℃ within 20 min,respectively.When a two-layer film was prepared with the cured polymer BPAN+M20S as the bottom cladding and an E.O.polymer BPAN-1A-NT as the upper layer,SEM studies showed a perfect interface between the bottom and the upper layers of the two-layer film and the surface of the upper layer was quite smooth.A polymeric planar prototype waveguide,which was fabricated based on the above two-layer film and covered by another layer of UV photoresist,showed good wave-guide performance.
基金Project(AA18242008)supported by the Guangxi Science&Technology Major Project,ChinaProject(HZXYKFKT201904)supported by the Opening Project of Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization,China。
文摘Calcium carbonate,which is widely employed as a filler added into the polymer matrix,has large numbers of applications owing to the excellent properties such as low cost,non-toxicity,high natural reserves and biocompatibility.Nevertheless,in order to obtain the good filling effect,calcium carbonate needs to be surface modified by organic molecules so as to enhance the dispersion and compatibility within the composites.This review paper systematically introduces the theory,methods,and applications progress of calcium carbonate with surface modification.Additionally,the key factors that affect the properties of the composites as well as the current difficulties and challenges are highlighted.The current research progress and potential application prospects of calcium carbonate in the fields of plastics,rubber,paper,medicine and environmental protection are discussed as well.Generally,this review can provide valuable reference for the modification and comprehensive utilization of calcium carbonate.
