用磷酸氢二钠（SPDD）和／或柠檬酸配制了不同pH值的固化液，在1300℃煅烧β-磷酸三钙制备了α-磷酸三钙（α—TCP），在1420℃煅烧等摩尔混合的二水磷酸氢钙和碳酸钙制备了磷酸四钙（TeCP）．制备骨水泥样品时固化液与固相的比（L／P）为0．25～0．45mL／g．测量了骨水泥的抗压强度和孔隙率，考察了L／P和固化液组成对水泥抗压强度的影响．结果表明：抗压强度随固化液pH值降低而增大，抗压强度达到最大值有一个最优的L／P．在L／P=0．30mL／g and pH=5的条件下，抗压强度达到21．69MP．
Poly（propylene fumarate-co-propylene sebacate） （P（PF-co-PS）） was crosslinked with Nvinyl pyrrolidone （N-VP） to form networks. It was investigated as biodegradable bone cement. In this paper, P（PF-co-PS） was synthesized and characterized by ^1H-NMR, FTIR and GPC. The effects of the amount of sebacate segments in P（PF-co-PS） main chains and the quantity of N-vinyl pyrrolidone on the in vitro degradation of the polymer networks were examined. Cylindrical specimens were submerged in phosphate buffered saline （PBS） at 37 ℃ and the pH value of PBS is 7.4 for 10 weeks. The gravimetry and compressive mechanical properties were tested over the degradation period. Networks formed by P（PF-oo-PS）8020/N-VP exhibited higher weight loss and better mechanical properties when compared with poly（propylene fumarate）/N-VP networks. The mechanical properties of P（PF-co-PS）/N-VP can be maintained for a very long time, even for 70 days, the yield strength, fracture strength and compressive modulus are （51.78 ± 2.01） MPa, （52.331 ± 1.84） MPa and （957.78 ± 24.40） MPa, respectively. The results demonstrate that the compressive mechanical properties and degradation velocity can be modulated by the amount of crosslinking agents and sebacate segments along the main chains of copolymers.
